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Eco-friendly preparation of chitooligosaccharides with different degrees of deacetylation from shrimp shell waste and their effects on the germination of wheat seeds
Xiaodan Fu, Lin Zhu, Li Li, Tan Zhang, Meng Li, Haijin Mou
2019, 1(1): 95-103.  doi: 10.1007/s42995-019-00012-3
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Recent advances in amino acid sensing and new challenges for protein nutrition in aquaculture
Chengdong Liu, Xuan Wang, Huihui Zhou, Kangsen Mai, Gen He
2019, 1(1): 50-59.  doi: 10.1007/s42995-019-00022-1
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Morphogenesis: a focus on marine invertebrates
Zhiyi Lv, Qiongxuan Lu, Bo Dong
2019, 1(1): 28-40.  doi: 10.1007/s42995-019-00016-z
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Cost-reduction strategies in massive genomics experiments
Haichao Li, Kun Wu, Chenchen Ruan, Jiao Pan, Yujin Wang, Hongan Long
2019, 1(1): 15-21.  doi: 10.1007/s42995-019-00013-2
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Our recent progress in epigenetic research using the model ciliate, Tetrahymena thermophila
Ting Cheng, Yuanyuan Wang, Jie Huang, Xiao Chen, Xiaolu Zhao, Shan Gao, Weibo Song
2019, 1(1): 4-14.  doi: 10.1007/s42995-019-00015-0
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Microbial assembly, interaction, functioning, activity and diversifcation: a review derived from community compositional data
Jiwen Liu, Zhe Meng, Xiaoyue Liu, Xiao-Hua Zhang
2019, 1(1): 112-128.  doi: 10.1007/s42995-019-00004-3
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Protective effect of sulfated polysaccharides from a Celluclast-assisted extract of Hizikia fusiforme against ultraviolet B-induced photoaging in vitro in human keratinocytes and in vivo in zebrafsh
Lei Wang, Jae Young Oh, Hye-Won Yang, Hyun Soo Kim, You-Jin Jeon
2019, 1(1): 104-111.  doi: 10.1007/s42995-019-00006-1
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Metabolites from marine invertebrates and their symbiotic microorganisms: molecular diversity discovery, mining, and application
Lu Liu, Yao-Yao Zheng, Chang-Lun Shao, Chang-Yun Wang
2019, 1(1): 60-94.  doi: 10.1007/s42995-019-00021-2
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Planktonic microbial eukaryotes in polar surface waters: recent advances in high-throughput sequencing
Qian Liu, Qiannan Zhao, Andrew McMinn, Eun Jin Yang, Yong Jiang
Accepted Manuscript  doi: 10.1007/s42995-020-00062-y
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Abstract:
Marine microbial eukaryotes are important primary producers and play critical roles in key biogeochemical cycles. Recent advances in sequencing technology have focused attention on the extent of microbial biodiversity, revealing a huge, previously underestimated phylogenetic diversity with many new lineages. This technology has now become the most important tool to understand the ecological significance of this huge and novel diversity in polar oceans. In particular, high-throughput sequencing technologies have been successfully applied to enumerate and compare marine microbial diversity in polar environments. Here, a brief overview of polar microbial eukaryote diversity, as revealed by in-situ surveys of the high-throughput sequencing on 18S rRNA gene, is presented. Using these ‘omic’ approaches, further attention still needs to be focused on diferences between specific locations and/or entire polar oceans and on bipolar comparisons of diversity and distribution.
The parasitic dinoflagellate Hematodinium infects marine crustaceans
Caiwen Li, Meng Li, Qian Huang
Accepted Manuscript  doi: 10.1007/s42995-020-00061-z
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Hematodinium is a type of parasitic dinoflagellate that infects marine crustaceans globally. The parasite lives mainly in the hemolymph or hemocoels of affected hosts, and results in mortalities due to malfunction or loss of functions of major organs. In recent years, the parasite had developed into an emerging epidemic pathogen not only affecting wild populations of economically valuable marine crustaceans in western countries but also the sustainable yield of aquaculture of major crabs in China. The epidemics of the parasitic diseases expanded recently in the coastal waters of China, and caused frequent outbreaks in aquaculture of major crab species, especially Portunus trituberculatus and Scylla paramamosain. In addition, the pathogen infected two species of co-cultured shrimps and multiple cohabitating wild crabs, implying it is a significant threat to the sustainable culture of commercially valuable marine crustaceans. In particular, the polyculture system that is widely used along the coast of China may facilitate the spread and transmission of the pathogen. Thus, to provide a better understanding of the biological and ecological characteristics of the parasitic dinoflagellate and highlight important directions for future research, we have reviewed the current knowledge on the taxonomy, life cycle, pathogenesis, transmission and epidemiology of Hematodinium spp. Moreover, ecological countermeasures have been proposed for the prevention and control of the emerging infectious disease.
The insect-killing bacterium Photorhabdus luminescens has the lowest mutation rate among bacteria
Jiao Pan, Emily Williams, Way Sung, Michael Lynch, Hongan Long
Accepted Manuscript  doi: 10.1007/s42995-020-00060-0
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Mutation is a primary source of genetic variation that is used to power evolution. Many studies, however, have shown that most mutations are deleterious and, as a result, extremely low mutation rates might be beneicial for survival. Using a mutation accumulation experiment, an unbiased method for mutation study, we found an extremely low base-substitution mutation rate of 5.94×10-11 per nucleotide site per cell division (95% Poisson conidence intervals:4.65×10-11, 7.48×10-11) and indel mutation rate of 8.25×10-12 per site per cell division (95% conidence intervals:3.96×10-12, 1.52×10-11) in the bacterium Photorhabdus luminescens ATCC29999. The mutations are strongly A/T-biased with a mutation bias of 10.28 in the A/T direction. It has been hypothesized that the ability for selection to lower mutation rates is inversely proportional to the effective population size (drift-barrier hypothesis) and we found that the effective population size of this bacterium is significantly greater than most other bacteria. This finding further decreases the lower-bounds of bacterial mutation rates and provides evidence that extreme levels of replication fidelity can evolve within organisms that maintain large effective population sizes.
High abundance and reproductive output of an intertidal limpet (Siphonaria japonica) in environments with high thermal predictability
Jie Wang, Xin Peng, Yun-wei Dong
Accepted Manuscript  doi: 10.1007/s42995-020-00059-7
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Abstract:
The predictability of high temperatures is important for intertidal species for coping with thermal stress. To investigate the roles of high temperature and its predictability on the population abundance and reproductive output of an intertidal rocky shore limpet, Siphonaria japonica, we monitored the operative temperature, recorded the population abundance of egg ribbons and adults, and quantiied the expression of heat shock protein 70 (hsp70) mRNA on two warm-temperate rocky shores with diferent thermal environments. Abundances of limpets and egg ribbons in the hotter but more predictable (HP) habitats were higher than those in the relatively benign and unpredictable (BU) habitats. In the HP habitats, there was a strong positive correlation between habitat temperature and population abundance. For limpets living in the HP habitats, the expression of hsp70 exhibited a smaller increase with rising body temperature than for BU limpets, indicating the existence in HP limpets of a preparatory strategy in cellular stress response against thermal stress. Our results demonstrate that the predictability of operative temperature can afect physiological responses and population dynamics. The importance of predictability should be considered in analyses of the ecological consequences of climate warming.
Metabolic diversiication of anaerobic methanotrophic archaea in a deep-sea cold seep
Wen-Li Li, Yu-Zhi Wu, Guo-wei Zhou, Hui Huang, Yong Wang
Accepted Manuscript  doi: 10.1007/s42995-020-00057-9
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Anaerobic methanotrophic archaea (ANME) can assimilate methane and govern the greenhouse efect of deep-sea cold seeps. In this study, a total of 13 ANME draft genomes representing ive ANME types (ANME-1a, ANME-1b, ANME-2a, ANME-2b and ANME-2c), in size between 0.8 and 1.8 Mbp, were obtained from the Jiaolong cold seep in the South China Sea. The small metagenome-assembled genomes (MAGs) contained all the essential pathways for methane oxidization and carbon dioxide ixation. All genes related to nitrate and sulfate reduction were absent from the MAGs, indicating their syntrophic dependence on partner organisms. Aside from acetate secretion and sugar storage, propanoate synthesis pathway, as an alternative novel carbon low, was identiied in all the MAGs and transcriptionally active. Regarding type-speciic features of the MAGs, the genes encoding archaellum and bacteria-derived chemotaxis were speciic to ANME-2, perhaps for itness under luctuation of methane and sulfate concentration lux. Our genomic and transcriptomic results strongly suggested that ANME could carry out simple carbon metabolism from C1 assimilation to C3 biosynthesis in the SCS cold seep, which casts light on a novel approach for synthetic biology.
Optimal amounts of coconut oil in diets improve the growth, antioxidant capacity and lipid metabolism of large yellow croaker (Larimichthys crocea)
Tao Ding, Ning Xu, Yongtao Liu, Xueshan Li, Xiaojun Xiang, Dan Xu, Chuanwei Yao, Qiangde Liu, Zhaoyang Yin, Kangsen Mai, Qinghui Ai
Accepted Manuscript  doi: 10.1007/s42995-020-00045-z
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Abstract:
The purpose of this study was to investigate the efect of diferent dietary coconut oil (CO) levels on growth, antioxidant capacity and lipid metabolism of juvenile large yellow croaker (Larimichthys crocea). Five iso-nitrogen (45% crude protein) and iso-lipid (13% crude lipid) experimental diets were prepared by replacing 0% (the control), 25%, 50%, 75% and 100% ish oil with coconut oil. The results showed that dietary CO had no signiicant efect on survival rate (SR, P > 0.05). However, the speciic growth rate was increased signiicantly when compared with the control group when ish were fed the diet with 50% CO (P < 0.05). The saturated fatty acids were increased signiicantly with increasing dietary CO in the liver and muscle, whereas the content of n-3 PUFA was decreased signiicantly (P < 0.05). The highest activities of glutathione peroxidase and superoxide dismutase in the liver were recorded in ish-fed diet with 50% CO; conversely, the content of malondialdehyde was signiicantly decreased (P < 0.05). The mRNA expression of peroxisome proliferator-activated receptor α, carnitine palmitoyl transferase 1 and acyl-CoA oxidase reached the highest levels in ish-fed diet with 50% CO. To some extent, this indicated that the rapid oxidation reaction of fatty acids to provide energy may be the reason for the rapid growth of large yellow croaker. In conclusion, ish-fed diet with 50% CO increased the growth rate and antioxidant capacity. Therefore, the timal replacement level of CO to FO in the diet should be 50%
Grazing by microzooplankton and copepods on the microbial food web in spring in the southern Yellow Sea, China
Yuan Zhao, Yi Dong, Haibo Li, Shiquan Lin, Lingfeng Huang, Tian Xiao, Gregori Gerald, Li Zhao, Wuchang Zhang
Corrected proof  doi: 10.1007/s42995-020-00047-x
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Abstract:
Assessment of microzooplankton and copepods grazing pressure on picoplankton is a key requirement for resolving the microbial food web efficiency. Although microzooplankton grazing on picoplankton has been extensively studied, the impact of microzooplankton on different groups of picoplankton, i.e., heterotrophic bacteria, Synechococcus and picoeukaryotes have rarely been compared. Furthermore, in the very few existing studies there is no consistent evidence of an enhancing or restraining effect of copepods on picoplankton. More studies are needed to improve our understanding of the influence of microzooplankton and copepod on picoplankton. Dilution incubations and copepod addition incubations were performed during a cruise to the southern Yellow Sea on May 16–29, 2007. The bulk grazing of microzooplankton and the calanoid copepod Calanus sinicus on phytoplankton, flagellates and picoplankton was estimated. Stations were divided into either eutrophic or oligotrophic according to the nutrient and biological parameters. Picoplankton comprised a large part of the diet of microzooplankton in the central oligotrophic area, while phytoplankton was the main food of microzooplankton in the coastal eutrophic area. In the central oligotrophic area, microzooplankton preferred grazing on Synechococcus. After copepod addition, ciliate abundance decreased while Synechococcus abundance increased (382%, 64% and 64% at three experimental stations, respectively), indicating strong grazing pressure of microzooplankton on Synechococcus. Our results suggest that Synechococcus might be an essential carbon source the planktonic food web in the oligotrophic waters of southern Yellow Sea.
Morphology, taxonomy and molecular phylogeny of three marine peritrich ciliates, including two new species: Zoothamnium apoarbuscula n. sp. and Z. apohentscheli n. sp. (Protozoa, Ciliophora, Peritrichia)
Tong Wu, Yuqing Li, Borong Lu, Zhuo Shen, Weibo Song, Alan Warren
Corrected proof  doi: 10.1007/s42995-020-00046-y
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Zoothamnium is a speciose genus, most species of which have incomplete morphological data based on modern criteria. In the present study, the morphology of three species of Zoothamnium, i.e., Z. apoarbuscula n. sp., Z. apohentscheli n. sp., and Z. alternans, collected in Qingdao, China, was revealed using living observation and silver staining. In addition, the SSU rDNA of each species was sequenced for phylogenetic analyses. Zoothamnium apoarbuscula n. sp. is characterized by its umbellate colony which is up to 900 μm high, dichotomously branched stalk, differentiation of zooids, and infundibular polykinety 3 comprising three equal-length ciliary rows. Zoothamnium apohentscheli n. sp is characterized by its large colony up to 1700 μm high, alternately branched stalk, and infundibular polykinety 3 comprising three equal-length ciliary rows. A population of Z. alternans is described in detail. Phylogenetic analyses based on SSU rDNA sequence data revealed that species with an alternately branched stalk cluster together in gene trees and probably represent an independent lineage within the genus Zoothamnium.
Applications of chitosan-based biomaterials: a focus on dependent antimicrobial properties
Zhenwei Deng, Ting Wang, Xiguang Chen, Ya Liu
Corrected proof  doi: 10.1007/s42995-020-00044-0
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Marine-derived chitosan has been widely examined for its use in developing biomedical materials. Not only is it non-toxic, biocompatible, and degradable, it has also shown unique antimicrobial properties. The antimicrobial properties of chitosan are restricted by neutral and physiological conditions because it is insoluble in water and its pKa values is 6.5. One solution to this problem is to graft chemically modified groups onto the backbone of chitosan. The aim of this paper is to review the mode of antimicrobial action of chitosan and chitosan derivatives. Using chitosan alone may not meet the demands of various applications. However, the introduction of additional polymers and antimicrobial agents is commonly used to enhance the antimicrobial potential of chitosan-based biomaterials. Chitosan-based composite biomaterials have been developed that allow diversified formulations to broaden applications, including nanoparticles, hydrogels, films, sponges, fibers, or even microspheres. These along with recent advances on chitosan-based composite biomaterials used for wound healing, food packaging, textile sector, 3D printing and dental materials, were reviewed in detail.
Heterologous expression and cell membrane localization of dinoflagellate opsins (rhodopsin proteins) in mammalian cells
Minglei Ma, Xinguo Shi, Senjie Lin
Corrected proof  doi: 10.1007/s42995-020-00043-1
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Abstract:
Rhodopsins are now found in all domains of life,and are classified into two large groups: type II,found in animals and type I found in microbes including Bacteria,Archaea,and Eukarya. While type II rhodopsin functions in many photodependent signaling processes including vision,type I among others contains rhodopsins that function as a light-driven proton pump to convert light into ATP as in proteobacteria (named proteorhodopsin). Proteorhodopsin homologs have been documented in dinoflagellates,but their subcellular localizations and functions are still poorly understood. Even though sequence analyses suggest that it is a membrane protein,experimental evidence that dinoflagellate rhodopsins are localized on the plasma membrane or endomembranes is still lacking. As no robust dinoflagellate gene transformation tool was available,we used HEK 293T cells to construct a mammalian expression system for two dinoflagellate rhodopsin genes. The success of expressing these genes in the system shows that this mammalian cell type is suitable for expressing dinoflagellate genes. Immunofluorescence of the expressed protein locates these dinoflagellate rhodopsins on the cell membrane. This result indicates that the protein codons and membrane targeting signal of the dinoflagellate genes are compatible with the mammalian cells,and the proteins' subcellular localization is consistent with proton pump rhodopsins.
Redescription of five tintinnine ciliates (Alveolata: Ciliophora: Oligotrichea) from coastal waters of Qingdao, China
Yang Bai, Rui Wang, Wen Song, Suzuki Toshikazu, Xiaozhong Hu
Corrected proof  doi: 10.1007/s42995-020-00034-2
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Tintinnine ciliates are widely distributed around the world and are characterized by the possession of a lorica that is highly diverse in structure and morphology. In the present study, five tintinnines, namely Tintinnopsis cf. radix, T. everta Kofoid and Campbell, 1929, T. mulctrella Kofoid and Campbell, 1929, Eutintinnus inflatus Marshall, 1969, and Favella ehrenbergii (Claparède and Lachmann, 1858) Jörgensen, 1924, were collected from coastal waters of Qingdao, China. Three are newly recorded from China, i.e., T. everta, T. mulctrella, and E. inflatus. The morphology of the lorica and cell proper of all five species are described and compared with original and subsequent descriptions. The morphology in vivo of the lorica and cell proper of all five species are described and compared with original and subsequent descriptions. In addition, the ciliary patterns of F. ehrenbergii and T. cf. radix are revealed based on protargol-stained specimens.
p-Terphenyl alcohols from a marine sponge-derived fungus, Aspergillus candidus OUCMDZ-1051
Dongyang Wang, Peng Qu, Jiayu Zhou, Yi Wang, Liping Wang, Weiming Zhu
Corrected proof  doi: 10.1007/s42995-020-00039-x
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Abstract:
In order to discover structurally new and bioactive compounds from marine life,we studied the secondary metabolites of the marine-derived fungi associated with a marine sponge (XS-3) from the Xisha islands. As a result,4-O-methylcandidusin A (1),a new p-terphenyl alcohol,along with nine known analogs (2-10),were isolated and identified from the marine sponge-derived fungus Aspergillus candidus OUCMDZ-1051. The structures of these compounds were determined by analyzing spectroscopic data,especially 1D and 2D NMR. The new compound 1 selectively inhibited the growth of the MDA-MB-468,BT474 and A431 human cancer cell lines with the IC50 values of 1.84,6.05 and 0.98 μmol/L,respectively. Compound 1 also displayed a selective antimicrobial activity against Escherichia coli with an MIC value of 27.3 μmol/L. The results indicated 4-O-methylcandidusin A (1) as a potential lead in the new drug discovery for triple negative breast cancer,invasive ductal breast cancer and epidermoid cancer. The antimicrobial metabolites also evidenced a clue for chemical defense of sponges by their associated microorganisms.
Reconsideration of the taxonomy of the marine ciliate Neobakuella aenigmatica Moon et al., 2019 (Protozoa, Ciliophora, Hypotrichia)
Tengyue Zhang, Jingyi Dong, Ting Cheng, Lili Duan, Chen Shao
2020, 2(2): 97-108.   doi: 10.1007/s42995-020-00032-4
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The morphology and divisional morphogenesis in a Chinese population of Neobakuella aenigmatica Moon et al., 2019 are reinvestigated. The body size, number and arrangement of parabuccal cirri and development of nuclear nodules in this population are discussed in comparison with closely related genera. The 18S rRNA gene sequence of the Chinese population is identical to that of a Korean population, supporting a distant relationship between N. aenigmatica and the cluster of N. flava and Apobakuella fusca. We deduce that this may be caused by the differences in the pattern of the parabuccal cirri and the number of parabuccal rows which are important for the phylogeny of Bakuella-like species.
Functional analysis of the methyltransferase SMYD in the single-cell model organism Tetrahymena thermophila
Xiaolu Zhao, Yuan Li, Lili Duan, Xiao Chen, Fengbiao Mao, Mina Juma, Yifan Liu, Weibo Song, Shan Gao
2020, 2(2): 109-122.   doi: 10.1007/s42995-019-00025-y
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Lysine methylation of histones and non-histones plays a pivotal role in diverse cellular processes. The SMYD (SET and MYND domain) family methyltransferases can methylate various histone and non-histone substrates in mammalian systems, implicated in HSP90 methylation, myofilament organization, cancer inhibition, and gene transcription regulation. To resolve controversies concerning SMYD's substrates and functions, we studied SMYD1 (TTHERM_00578660), the only homologue of SMYD in the unicellular eukaryote Tetrahymena thermophila. We epitope-tagged SMYD1, and analyzed its localization and interactome. We also characterized ΔSMYD1 cells, focusing on the replication and transcription phenotype. Our results show that: (1) SMYD1 is present in both cytoplasm and transcriptionally active macronucleus and shuttles between cytoplasm and macronucleus, suggesting its potential association with both histone and non-histone substrates; (2) SMYD1 is involved in DNA replication and regulates transcription of metabolism-related genes; (3) HSP90 is a potential substrate for SMYD1 and it may regulate target selection of HSP90, leading to pleiotropic effects in both the cytoplasm and the nucleus.
High-resolution linkage and quantitative trait locus mapping using an interspecifc cross between Argopecten irradians irradians (♀) and A. purpuratus (♂)
Junxia Mao, Qifan Zeng, Zujing Yang, Haoyuan Pan, Lijie Yao, Zhenmin Bao, Chunde Wang, Shi Wang
2020, 2(2): 123-134.   doi: 10.1007/s42995-020-00029-z
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The bay scallop and Peruvian scallop are economically important species. Interspecific hybrids of these two scallops outperformed both of their parent species in multiple growth traits but exhibited decreased fertility, which provides good models for the study of heterosis and species divergence. Genetic mapping serves as a chromosomal-level framework to investigate the molecular mechanisms of hybridization and introgression. In this study, high-resolution linkage maps were constructed for the bay and Peruvian scallops with an interspecific hybrid family. The linkage map of the bay scallop covered over 98.9% of the whole genome with 2994 mapped markers and the average marker interval of 0.32 cM. For the Peruvian scallop, 1585 markers were mapped with the average maker interval of 0.51 cM, covering 97.7% of the genome. Both the two linkage maps have 16 linkage groups, corresponding to the haploid chromosome number of the two species. Approximately, 54.5% of markers exhibited significant deviation from the expected Mendelian ratio of segregation, lending insights into the intrinsic incompatibility between the two species. QTLs related to growth and shell coloration were detected, which could explain 13.1% and 74.9% of the phenotypic variance, respectively. This represents important information for further evaluation. These findings are an important addition to the genomic resources for scallop genetic studies, and are especially useful for investigations on genomic incompatibility for hybridization, genome evolution of closely related species, and genetic enhancement programs in aquaculture.
Transcriptomic response to ammonia-N stress in the hepatopancreas of swimming crab Portunus trituberculatus
Lingjun Si, Luqing Pan, Hongdan Wang, Xin Zhang
2020, 2(2): 135-145.   doi: 10.1007/s42995-020-00033-3
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The swimming crab Portunus trituberculatus is an important farmed species in China. Ammonia-N represents a major physiological challenge for crab culture and the hepatopancreas plays a major role in physiological adaptation processes. To better understand the molecular mechanism of the crab in response to ammonia-N stress,we performed a transcriptome analysis in the hepatopancreas of P. trituberculatus challenged with ammonia-N stress (5 mg/L),using the high-throughput sequencing technology. In total,52,280 unigenes were obtained from the hepatopancreas of P. trituberculatus,with an average length of 678 bp. Functional categorization and pathways showed some differentially expressed genes were involved in amino acid and nucleobase metabolism,energy metabolism,antioxidation,immune response,reproduction,moulting and material transport. The differential expression patterns of eight randomly selected annotated genes were validated by quantitative real-time PCR (qPCR). Results revealed a substantial number of genes modified by ammonia-N stress and a few significant ammonia acclimation pathways,which will serve as an invaluable resource for revealing the molecular basis of physiological adaptation mechanism in P. trituberculatus.
Effects of latitude gradient and seasonal variation on the community structure and biodiversity of commercially important crustaceans in the Yellow Sea and the northern East China Sea
Qiang Wu, Xiujuan Shan, Xianshi Jin, Yue Jin, Fangqun Dai, Yongqiang Shi, Lisha Gua, Tao Zuo, Jianqiang Sun
2020, 2(2): 146-154.   doi: 10.1007/s42995-020-00026-2
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Abstract:
To evaluate the spatio-temporal variations in the community structure and biodiversity of commercially important crustaceans in the Yellow Sea and the northern East China Sea (NECS), the seasonal and regional changes in species composition, biomass structure, biodiversity and distribution of commercially important species were analyzed using bottom trawl survey data during 2014–2015. The results showed that the latitudinal gradient was obvious in species richness, dominant species and biodiversity. The indices of biodiversity increased with the decreasing latitude. When the sampling sites shifted south by one latitudinal degree, Margalef's richness index (D), Pielou's evenness index (J′) and Shannon–Wiener diversity index (H′) increased by 0.10, 0.03 and 0.09, respectively. The biomass proportion of the cold-temperate species represented by Crangon afnis declined with the decreasing latitude, and the warm-temperate species represented by Ovalipes punctatus and Portunus trituberculatus increased. Because of the growth regulation of crustaceans and the fshing moratorium, the biomass of commercially important crustaceans in the Yellow Sea and NECS was highest in October and August, respectively. Salinity had a more signifcant infuence on H′ of commercially important crustaceans than other environmental factors (including zooplankton density, sea bottom temperature and water depth). Overall, the results of this study contribute to a better understanding of community dynamics of crustaceans in the Yellow Sea and NECS, and provide evidence to verify the latitudinal gradient theory in biodiversity.
Three nitrogen-containing metabolites from an algicolous isolate of Trichoderma asperellum
Yinping Song, Fengping Miao, Xiuli Yin, Naiyun Ji
2020, 2(2): 155-160.   doi: 10.1007/s42995-020-00030-6
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As one of the most productive species,Trichoderma asperellum,especially isolated from marine algae,has contributed a number of new terpenes and nitrogen-bearing compounds,encouraging our continuous efforts to further explore them. Consequently,three new nitrogen-containing secondary metabolites,including cyclo(L-5-MeO-Pro-L-5-MeO-Pro) (1),5′-acetoxy- deoxycyclonerin B (2),and 5′-acetoxy-deoxycyclonerin D (3) were isolated from the marine alga-derived endophytic fungus Trichoderma asperellum A-YMD-9-2. Their structures and relative configurations were fully elucidated through spectroscopic techniques,mainly including 1D/2D NMR and MS. The absolute configurations of 1 and 2 were ascertained on the basis of X-ray diffraction (Cu Kα radiation) and ECD data,respectively. The isolation of these new nitrogen-bearing compounds adds to the structural diversity of marine algicolous Trichoderma spp.,and they display potent inhibition against some marine phytoplankton species.
The differentiation of iron-reducing bacterial community and iron reduction activity between riverine and marine sediments in the Yellow River estuary
Hongxia Zhang, Fanghua Liu, Shiling Zheng, Lei Chen, Xiaoli Zhang, Jun Gong
2020, 2(1): 87-96.   doi: 10.1007/s42995-019-00001-6
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Microbial assembly, interaction, functioning, activity and diversifcation: a review derived from community compositional data
Jiwen Liu, Zhe Meng, Xiaoyue Liu, Xiao-Hua Zhang
2019, 1(1): 112-128.   doi: 10.1007/s42995-019-00004-3
Abstract HTML PDF(28)
Methods for the diagnosis of bacterial fish diseases
Brian Austin
2019, 1(1): 41-49.   doi: 10.1007/s42995-019-00002-5
Abstract HTML PDF(34)
Our recent progress in epigenetic research using the model ciliate, Tetrahymena thermophila
Ting Cheng, Yuanyuan Wang, Jie Huang, Xiao Chen, Xiaolu Zhao, Shan Gao, Weibo Song
2019, 1(1): 4-14.   doi: 10.1007/s42995-019-00015-0
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Vertical variation in Vibrio community composition in Sansha Yongle Blue Hole and its ability to degrade macromolecules
Bei Li, Jiwen Liu, Shun Zhou, Liang Fu, Peng Yao, Lin Chen, Zuosheng Yang, Xiaolei Wang, Xiao-Hua Zhang
2020, 2(1): 60-72.   doi: 10.1007/s42995-019-00003-4
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Effects of Bacillus subtilis on hepatic lipid metabolism and oxidative stress response in grass carp (Ctenopharyngodon idellus) fed a high-fat diet
Hui Zhao, Yan'er Luo, Yongan Zhang, Xiaoxuan Chen, Hui Wang, Daoyuan Guo, Zhixin Wu
2020, 2(1): 50-59.   doi: 10.1007/s42995-019-00005-2
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Recent advances in amino acid sensing and new challenges for protein nutrition in aquaculture
Chengdong Liu, Xuan Wang, Huihui Zhou, Kangsen Mai, Gen He
2019, 1(1): 50-59.   doi: 10.1007/s42995-019-00022-1
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Diversity of culturable heterotrophic bacteria from the Mariana Trench and their ability to degrade macromolecules
Xiuxiu Zhao, Jiwen Liu, Shun Zhou, Yanfen Zheng, Yanhong Wu, Kazuhiro Kogure, Xiao-Hua Zhang
2020, 2(2): 181-193.   doi: 10.1007/s42995-020-00027-1
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Protective effect of sulfated polysaccharides from a Celluclast-assisted extract of Hizikia fusiforme against ultraviolet B-induced photoaging in vitro in human keratinocytes and in vivo in zebrafsh
Lei Wang, Jae Young Oh, Hye-Won Yang, Hyun Soo Kim, You-Jin Jeon
2019, 1(1): 104-111.   doi: 10.1007/s42995-019-00006-1
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Chemical diversity and biological function of indolediketopiperazines from marine-derived fungi
Jin Cao, Bin-Gui Wang
2020, 2(1): 31-40.   doi: 10.1007/s42995-019-00023-0
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Marine Life Science & Technology

(Started in 2019)

  • Editor-in-Chief: Weibo Song
  • Executive Deputy Editor: Xiao-Hua Zhang
  • Frequency of Publication: Quarterly
  • ISSN: 2096-6490
  • eISSN: 2662-1746
  • CN:    37-1519/Q