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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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Identification, expression analysis, and functional characterization of ghrelin and its receptors in spotted sea bass (Lateolabrax maculatus)
Peng Yu, Yangyang Zhou, Xin Qi, Hongying Fan, Kaiqiang Zhang, Xiaoyan Zhang, Yun Li, Haishen Wen
Accepted Manuscript  doi: 10.1007/s42995-020-00055-x
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Abstract:
Ghrelin (Ghrl), an appetite-inducing peptide hormone secreted by the stomach, is the endogenous ligand for the growth hormone secretagogue receptor (Ghs-r). In this study, we identified the preproghrelin gene and its receptors in spotted sea bass (Lateolabrax maculatus). The ghrl gene consisted of an open reading frame (ORF) of 324 nucleotides encoding 107 amino acids, and the premature protein contained a 20-amino-acid mature peptide. Through a syntenic analysis, we also validated the annotation of growth hormone secretagogue receptor 1a (ghs-r1a) and growth hormone secretagogue receptor 1a-like (ghs-r1a-like), which contained seven-transmembrane structures, in spotted sea bass. The ORF of ghs-r1a consisted of 1152 bp that encoded a 383-amino-acid protein, and ghs-r1a-like contained an ORF of 2631 bp and produced a protein with 876 amino acids. A phylogenetic analysis showed that spotted sea bass ghrl and its receptors clustered with those of other ishes and were more distantly related to those of other vertebrates. In situ hybridization revealed that ghrl was highly expressed in the stomach and localized in the mucosa and submucosa. The expression of these genes varied during short-term starvation in a time-dependent manner. In vitro studies showed that after incubation with Ghrl for 3 h enhanced the expression of motilin (mln), gastrin (gas) and cholecystokinin (cck), but this effect vanished after 6 h of incubation. In summary, Ghrl and its receptors might play important roles in the regulation of food intake in spotted sea bass.
Characterization of TEMPO-oxidized chitin nanofibers with various oxidation times and its application as an enzyme immobilization support
Rui Chen, Wen-Can Huang, Wei Wang, Xiangzhao Mao
Accepted Manuscript  doi: 10.1007/s42995-020-00054-y
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Abstract:
Chitin nanofibers have recently received increased attention and are considered to be a promising material for a wide range of applications because of their excellent characteristics. In this study, 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized chitin nanofibers (CNFs) with various oxidation times were prepared and characterized. CNFs with different oxidation times were then utilized for enzyme immobilization, using chymotrypsin as a model enzyme. The effects of oxidation time on enzyme immobilization were explored. Results showed characteristics of chitin nanofibers can be controlled by adjusting oxidation time. CNFs treated with TEMPO for 360 min showed the lowest crystallinity (79.13 ± 1.43%), the shortest length (241.70 ± 74.61 nm), the largest width (12.67 ± 3.43 nm), and the highest transmittance (73.01% at 800 nm). The activity of immobilized enzymes and enzyme loading showed good correlation to the carboxylate content of CNFs. The enzyme eiciency based on CNFs and the content of carboxylate groups peaked at the oxidization time of 60 min. When the additional amount of chymotrypsins (CTs) was 500 or 2000 mg/g carrier, the highest loading amount of CTs was 307.17 ± 4.08 or 726.82 ± 12.05 mg/g carrier, respectively.
Strategies for culturing active/dormant marine microbes
Da-Shuai Mu, Yang Ouyang, Guan-Jun Chen, Zong-Jun Du
Accepted Manuscript  doi: 10.1007/s42995-020-00053-z
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Abstract:
Microorganisms are ubiquitous in the ocean environment and they play key roles in marine ecosystem function and service. However, many of their functions and phenotypes remain unknown because indigenous marine bacteria are mostly diicult to culture. Although many novel techniques have brought previously uncultured microbes into laboratory culture, there are still many most-wanted or key players that need to be cultured from marine environments. This review discusses possible reasons for ‘unculturable microbes’ and categorizes uncultured bacteria into three groups: dominant active bacteria, rare active bacteria, and dormant bacteria. This review also summarizes advances in cultivation techniques for culturing each group of unculturable bacteria. Simulating the natural environment is an effective strategy for isolating dominant active bacteria, whereas culturomics and enrichment culture methods are proposed for isolating rare active bacteria. For dormant bacteria, resuscitation culture is an appropriate strategy. Furthermore, the review provides a list of the most-wanted bacteria and proposes potential strategies for culturing these bacteria in marine environments. The review provides new insight into the development of strategies for the cultivation of speciic groups of uncultured bacteria and therefore paves the way for the detection of novel microbes and their functions in marine ecosystems.
Roles of dietary taurine in fish nutrition
W. W. H. A. Sampath, R. M. D. S. Rathnayake, Mengxi Yang, Wenbing Zhang, Kangsen Mai
Accepted Manuscript  doi: 10.1007/s42995-020-00051-1
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Abstract:
Taurine is a conditionally essential amino acid in fish nutrition.The present study addressed the practical application of examining published data on fish nutrition over the past 20 years,emphasizing the topic of taurine by using computational tools and their applications.According to the published articles,an increased linear growth of research occurred,with Japanese flounder being the most examined fish species.Dietary taurine supplementation has several beneficial effects in fish nutrition, such as survival,growth,feed utilization,protein and energy retention,intermediate metabolism,anti-oxidation,anti-stress, disease resistance,muscle texture and reproductive performance.Also,there are negative effects in some species.Dietary taurine exerted effects on several gene expressions and enzyme activities;these are important in taurine metabolism in fish. These genes and enzymes included taurine transporter (TauT),cysteine dioxygenase (CDO),cysteamine dioxygenase (ADO), cysteine sulfonate decarboxylase (CSD) and pretrypsinogen (Ptry).Plant protein-based diets with taurine supplementation are recommended because of the absence of taurine in plant protein.
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%
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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Abstract:
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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Abstract:
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.
Successive digestion of tilapia collagen by serine proteinase and proline specifc endopeptidase to produce novel angiotensin I-converting enzyme inhibitory peptides
Xin Hua, Lechang Sun, Chan Zhong, Qiang Wu, Panpan Xiao, Asami Yoshida, Guangming Liu, Minjie Cao
Corrected proof  doi: 10.1007/s42995-020-00038-y
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Abstract:
Serine proteinase, purified from the hepatopancreas of Pacific white shrimp (Litopenaeus vannamei), was used to hydrolyze acid solubilized collagen (ASC) isolated from Nile tilapia (Oreochromis sp.) skin to produce angiotensin I-converting enzyme (ACE) inhibitory peptides (ACEIPs). A series of column chromatography assays were used to separate the ACEIPs. A peptide, NPARTCR, was isolated as it exhibited high ACE inhibition potential. Further digestion of this peptide by a proline specific endopeptidase (PSEP), produced a pentapeptide ARTCR with ACE inhibitory activity (IC50) of 77.0 μmol/L. Both NPARTCR and ARTCR inhibited ACE in a non-competitive manner. An in vivo study in rats demonstrated that ARTCR has ACE inhibitory activity via lowering systolic blood pressure in spontaneously hypertensive rats (SHRs). These results suggest that processing by-products from shrimp and tilapia are ideal raw materials for the production of serine proteinase and collagen, respectively. Serine proteinase and collagen are both ideal raw materials that can be used to derive ACE inhibitory active peptides against hypertension.
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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Abstract:
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