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Stomatal dynamics are regulated by leaf hydraulic traits and guard cell anatomy in nine true mangrove species

Plant Diversity 2024年第3期46卷 395-405页

作者： Ya-Dong Qie Qi-Wei Zhang Scott A.M.McAdam Kun-Fang Cao state key laboratory for conservation and Utilization of Subtropical Agro-Bioresources College of ForestryGuangxi UniversityNanning 530004China Guangxi key laboratory of Forest Ecology and conservation College of ForestryGuangxi UniversityNanning 530004China key laboratory of Ecology of Rare and endangered Species and Environmental Protection Ministry of EducationGuangxi Normal UniversityGuilin 541001China Guangxi key laboratory of Landscape resources conservation and Sustainable Utilization in Lijiang River Basin Guangxi Normal UniversityGuilin 541001China Purdue center for Plant biology Department of Botany and Plant PathologyPurdue UniversityWest LafayetteIN 47907USA

Stomatal regulation is critical for mangroves to survive in the hyper-saline intertidal zone where water stress is severe and water availability is highly ***,very little is known about the stomatal sensitivity to vapour pressure deficit(VPD)in mangroves,and its co-ordination with stomatal morphology and leaf hydraulic *** measured the stomatal response to a step increase in VPD in situ,stomatal anatomy,leaf hydraulic vulnerability and pressure-volume traits in nine true mangrove species of five families and collected the data of genome *** aimed to answer two questions:(1)Does stomatal morphology influence stomatal dynamics in response to a high VPD in mangroves?with a consideration of possible influence of genome size on stomatal morphology;and(2)do leaf hydraulic traits influence stomatal sensitivity to VPD in mangroves?We found that the stomata of mangrove plants were highly sensitive to a step rise in VPD and the stomatal responses were directly affected by stomatal anatomy and hydraulic ***,denser stomata was correlated with faster stomatal closure at high VPD across the species of Rhizophoraceae,and stomata size negatively and vein density positively correlated with genome *** negative leaf osmotic pressure at the full turgor(πo)was related to higher operating steady-state stomatal conductance(gs);and a higher leaf capacitance(Cleaf)and more embolism resistant leaf xylem were associated with slower stomatal responses to an increase in *** addition,stomatal responsiveness to VPD was indirectly affected by leaf morphological traits,which were affected by site salinity and consequently leaf water *** results demonstrate that mangroves display a unique relationship between genome size,stomatal size and vein packing,and that stomatal responsiveness to VPD is regulated by leaf hydraulic traits and stomatal *** work provides a quantitative framework to better understand of stomatal regulation in mangroves

关键词： Stomatal temporal kinetics Vapour-pressure deficit(VPD) Leaf water relations Leaf hydraulic vulnerability Leaf osmotic potential Genome size

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Genomic structure and evolution of beta-defensin genes in the golden pheasant and hwamei

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Science Bulletin 2015年第7期60卷 679-690,M0003页

作者：陈辉马美英孙力方盛国万秋红 The key laboratory of conservation biology for endangered wildlife of the ministry of education and State Conservation Center for Gene Resources of Endangered Wildlife College of Life Sciences Zhejiang University

Defensins play a vital role in the early stage of infection before adaptive immune responses are generated. Thus far, only limited detailed genomic data for avian defensin genes have been described. Here, using bacterial ar- tificial chromosome libraries, we found that a 95 kb and 177 kb sequences in the golden pheasant （Chrysolophus pictus, Galliformes） and hwamei （Garrulax canorus, Passeriformes） corresponds to 16 and 30 defensin genes, respectively. Fluorescence in situ hybridization assigned defensin gene clusters in the golden pheasant and hwamei to chromosomes 2q and 3q, respectively. In combination with the previous chicken （Gallus gallus, Galliformes） and zebra finch （Taeniopygia guttata, Passeriformes） defensin clusters, the comparative genomic analysis revealed that lineage- specific duplications and deletions have given rise to clearly different genomic structures. On the basis of genomic char- acteristics, we further found that transposable elements act as agents of evolution, causing direct and indirect copy number variations in defensin genes via duplications. Tissue ex- pression analysis showed that the Passeriformes-specific duplicated AvBD1 and AvBD3 genes are mainly expressed in the upper and lower respiratory tract, tongue, and spleen. Our analyses indicate that the duplication-and-deletion of defensin genes conformed to the birth-and-death evolutionary process and that transposable elements induced theduplication of defensin genes. Moreover, the respiratory system-specific expression pattern of Passeriformes-specific expanded AvBD1 and AvBD3 genes suggests their important role in maintaining the singing trait of songbirds. The understanding of the genomic structure, expression, and evolution of defensin genes can provide a crucial immunological foundation to study and prevent avian diseases.

关键词： AvBD Comparative genomic analysisTissue-specific expression Transposable element

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Characterization of major histocompatibility complex DRA and DRB genes of the forest musk deer(Moschus berezovskii)

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Chinese Science Bulletin 2013年第17期58卷 2191-2197页

作者： LI Ling ZHU Ying GE YunFa WAN QiuHong The key laboratory of conservation biology for endangered wildlife of the ministry of education and state conservation center for gene resources of endangered wildlife College of Life SciencesZhejiang University

The forest musk deer(Moschus berezovskii) is one of the most endangered species in *** the past decades,extensive hunting and poaching have pushed the forest musk deer to the edge of extinction,and conservation biologists are presently pursuing scientific management plans to rescue this *** major histocompatibility complex(MHC),a cluster of genes responsible for antigen presentation,is a highly polymorphic genomic region in vertebrates that has become a popular functional marker system for studying adaptive *** this study,we developed locus-specific genotyping primers for exon 2 fragments of one DRA gene and one DRB locus of the forest musk deer using a suite of comprehensive methods that included universal primer amplification,genome walking,single-strand conformation polymorphism(SSCP),heteroduplex(HD) profiling,and sequence *** forest musk deer showed no more than two sequences per locus,confirming the specificity of our *** with these primers allowed us to identify two DRA alleles and six DRB alleles in a captive breeding population of the Sichuan Musk Deer Breeding *** the DRA locus,we found a slightly higher observed heterozygosity(N O =0.154) than expected(N E =0.143).In contrast,the DRB locus showed a significant heterozygote deficiency(N O =0.508;N E =0.761;Pgeneration of phylogenetic trees for the DRA and DRB sequences of the forest musk deer and other ruminants revealed that the DRA and DRB loci identified in this study had homologous relationships with the known ruminant DRA and DRB *** on this analysis,and to facilitate future studies,we named these novel loci Mobe-DRA and Mobe-DRB3.

关键词：主要组织相容性复合体 RB基因 DRA 林麝单链构象多态性表征通用引物抗原呈递

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Characterization of MHC class Ⅱ A genes in Hainan Eld's deer(Cervus eldi hainanus)

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Chinese Science Bulletin 2013年第17期58卷 2148-2153页

作者： LIU HongYi YANG HaiQiong GE YunFa The key laboratory of conservation biology for endangered wildlife of the ministry of education and state conservation center for gene resources of endangered wildlife College of Life SciencesZhejiang University

The major histocompatibility complex(MHC) genes play pivotal roles in the immune system of vertebrates against *** are also significant indicators of genetic structure,and are vital to species-level population viability analyses and disease risk *** this study,two DRA and two DQA sequences were isolated from Hainan Eld's deer(Cervus eldi hainanus) using rapid amplification of cDNA ends(RACE) and single-strand conformation polymorphism-heteroduplex(SSCP-HD) *** sequence analysis revealed large differences between the two DQA sequences,especially in their exon 2 regions,but only minimal differences between the variants of the DRA *** of the predicted amino acid sequences of the Ceel-MHC class Ⅱ A variants with those from six other species revealed that these molecules share high homology among ruminants.A phylogenetic tree of four class Ⅱ A sequences from Hainan Eld's deer and the other species placed the newly identified DQA and DRA genes on two distinct branches(100%-supportively),and further divided the two DQA sequences into 98%-supportive DQA1 and 99%-supportive DQA2 clusters,***,this study identified monomorphic Ceel-DQA1 and Ceel-DQA2 genes,and one dimorphic Ceel-DRA gene from Hainan Eld's deer.

关键词：海南坡鹿 MHC 基因核苷酸序列分析主要组织相容性复合体快速扩增cDNA末端种群生存力分析单链构象多态性

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Isolation and characterization of class Ⅰ MHC genes in the giant panda(Ailuropoda melanoleuca)

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Chinese Science Bulletin 2013年第17期58卷 2140-2147页

作者： ZHU Ying SUN DanDan GE YunFa YU Bin CHEN YiYan WAN QiuHong The key laboratory of conservation biology for endangered wildlife of the ministry of education State Conservation Center for Gene Resources of Endangered WildlifeCollege of Life SciencesZhejiang University

Artificial breeding is an important project to protect,recover and reintroduce endangered *** of the population's genetic diversity at functional loci is important for the establishment of effective captive breeding *** major histocompatibility complex(MHC) genes are ideal candidate genetic markers to inform planned breeding,due to their high levels of polymorphism and importance in the main immune coding region of the vertebrate *** this study,we constructed BAC-based contigs and isolated six functional MHC class Ⅰ genes from the giant panda(Ailuropoda melanoleuca),which we designated Aime-C,Aime-F,Aime-I,Aime-K,Aime-L and *** of the tissue expression patterns and full-length cDNA sequences of these class I genes revealed that Aime-C,-F,-I and-L could be considered classical class Ⅰ loci,due to their extensive expression patterns and normal exonic *** contrast,Aime-K and-1906 appeared to be nonclassical genes based on their tissue-specific expression patterns and the presence of an abnormal exon 7 in both *** established techniques for genotyping exons 2 and 3 of the classical loci using locus-specific single strand conformation polymorphism(SSCP) and sequence *** the Chengdu captive population,we identified one monomorphic locus(Aime-F) and three polymorphic loci with different numbers of alleles(4/4/4 exon 2 alleles at Aime-C/I/L and 6/5/5 exon 3 alleles at Aime-C/I/L).The distributions of the Aime-C,-I and-L alleles among members of different families were in good agreement with the known pedigree relationships,suggesting that the genotyping results are ***,the MHC-I genotyping techniques established in this study may provide a powerful tool for the future design of scientific breeding or release/reintroduction programs.

关键词：动物基因组大熊猫 MHC 主要组织相容性复合物单链构象多态性基因分型技术等位基因数全长cDNA序列

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Improving landscape connectivity through habitat restoration:application for Asian elephant conservation in Xishuangbanna Prefecture,China

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Integrative Zoology 2024年第2期19卷 319-335页

作者： Bin WAN Wenwen LI Peng LIU Nian YANG Shang CHEN Xianming GUO Bin WANG Li ZHANG key laboratory for Biodiversity Science and Ecological Engineering Ministry of EducationCollege of Life SciencesBeijing Normal UniversityBeijingChina Research center for Coastal Zone Science and Marine Development Strategy First Institute of OceanographyMinistry of Natural ResourcesQingdaoChina School of Biological Sciences The University of Hong KongPokfulamHong KongChina Research Institute of Xishuangbanna National Nature Reserve JinghongChina Xishuangbanna Asian Elephant conservation and Management center JinghongChina

Habitat restoration is an effective method for improving landscape connectivity,which can reduce habitat *** landscape connectivity could promote connections between habitat,which is extremely essential to preserve gene flow and population *** study proposes a methodological framework to analyze landscape connectivity for Asian elephant habitat conservation,aiming to provide practical options for reducing habitat fragmentation and improving habitat *** approach involved combining a species distribution model using MaxEnt and landscape functional connectivity models using graph theory to assess the impact on connectivity improvement via farmland/plantation restoration as *** results showed that:(1)there were 119 suitable habitat patches of Asian elephant covering a total area of 1952.41 km^(2).(2)The connectivity between habitats improved significantly after vegetation restoration and the gain first decreased and then increased with the increase of dispersal distance.(3)The first few new habitat patches that were identified played an important role in improving connectivity,and the variation rate of connectivity gradually leveled off as the number of new habitats increased.(4)Prioritization of the 25 best new habitat patches increased connectivity from 0.54%to 5.59%as the dispersal distance increased and mainly was located between two Asian elephant distribution regions and two *** of new habitat patches was effective for improving or restoring *** findings can be used as guidance for improving the studied fragmented Asian elephant habitats,and they can also be used as a reference for the habitat restoration of other endangered species heavily affected by habitat fragmentation.

关键词： Asian elephant connectivity habitat restoration habitat suitability landscape graphs

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Nest Site Preference and Fidelity of Chinese Alligator (Alligator sinensis)

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Asian Herpetological Research 2017年第4期18卷 244-252页

作者： Haiqiong YANG Lan ZHAO Qunhua HAN Shengguo FANG The key laboratory of conservation biology for endangered wildlife of the ministry of education and StateConservation Center for Gene Resources of Endangered Wildlife College of Life Sciences Zhejiang UniversityHangzhou 310058 China

Oviparous female reptiles select nesting sites with optimal ecological factors that contribute to egg development. Chinese alligator （Alligator sinensis）, an oviparous reptile, is a critically endangered crocodilian with temperature-dependent sex determination. Research on its nesting behavior may facilitate the protection of this species. In this study, we monitored nesting behavior over eight years. We compared selected frequency of nest sites, distance from nest site to water, height from nest site top to the water surface, distance from nest site to human activity region, and canopy density between nest sites on the island and bank. The results showed that 45 nest sites were used by female alligators over eight years and each site was selected from one to 10 times. The selected frequency of nest site occurrence on the island was higher than that on the bank （P 〈 0.001）. We observed that 88% of the individual alligators （15/17） showed different degrees of nest site fidelity. However, Chinese alligators might not always be loyal to only one nest site because of environmental changes or interspecific competition at nest sites. Our findings suggest that female alligators prefer to nest at island, which might be because of the nests on the island had a higher canopy density （P = 0.010） and were further from the human activity region （P 〈 0.001） than those on the bank did. It would be beneficial to reduce human activities during the breeding season and protect the vegetation of Chinese alligator habitats in the future.

关键词： Chinese alligator ecological factor nest site preference nest site fidelity

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Special Topic on conservation biology of endangered wildlife pushes conservation studies

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Chinese Science Bulletin 2012年第36期57卷 4807-4808页

作者： FANG ShengGuo ZHU Ying key laboratory of conservation biology for endangered wildlife of the ministry of education State Conservation Center for Gene Resources of Endangered WildlifeCollege of Life SciencesZhejiang UniversityHangzhou 310058China

In recent years Chinese Science Bulletin has published some work focused on environment,biodiversity and sustainability,etc.[1-10].This has promoted the follow-up and indepth research efforts,and to some extent,has ac... 详细信息

关键词：濒危野生动物保护生物学专题生物多样性可持续性植物保护工作集

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Cryptic divergences and repeated hybridizations within the endangered “living fossil” dove tree(Davidia involucrata) revealed by whole genome resequencing

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Plant Diversity 2024年第2期46卷 169-180页

作者： Yumeng Ren Lushui Zhang Xuchen Yang Hao Lin Yupeng Sang Landi Feng Jianquan Liu Minghui Kang key laboratory of Bio-resource and Eco-environment of ministry of education College of Life SciencesSichuan UniversityChengdu 610065China state key laboratory of Herbage Improvement and Grassland Agro-ecosystem College of EcologyLanzhou UniversityLanzhou 730000China Guangdong Provincial key laboratory of Plant Adaptation and Molecular Design Guangzhou Key Laboratory of Crop Gene EditingInnovative Center of Molecular Genetics and EvolutionSchool of Life SciencesGuangzhou UniversityGuangzhou 510006China

The identification and understanding of cryptic intraspecific evolutionary units(lineages) are crucial for planning effective conservation strategies aimed at preserving genetic diversity in endangered ***, the factors driving the evolution and maintenance of these intraspecific lineages in most endangered species remain poorly understood. In this study, we conducted resequencing of 77 individuals from 22 natural populations of Davidia involucrata, a “living fossil” dove tree endemic to central and southwest China. Our analysis revealed the presence of three distinct local lineages within this endangered species, which emerged approximately 3.09 and 0.32 million years ago. These divergence events align well with the geographic and climatic oscillations that occurred across the distributional ***, we observed frequent hybridization events between the three lineages, resulting in the formation of hybrid populations in their adjacent as well as disjunct regions. These hybridizations likely arose from climate-driven population expansion and/or long-distance gene flow. Furthermore, we identified numerous environment-correlated gene variants across the total and many other genes that exhibited signals of positive evolution during the maintenance of two major local lineages. Our findings shed light on the highly dynamic evolution underlying the remarkably similar phenotype of this endangered species. Importantly, these results not only provide guidance for the development of conservation plans but also enhance our understanding of evolutionary past for this and other endangered species with similar histories.

关键词： Davidia involucrata Cryptic lineage Hybridization Population genomics Positive evolution

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Safety assessment of a novel marine multi-stress-tolerant yeast Meyerozyma guilliermondii GXDK6 according to phenotype and whole genome-sequencing analysis

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Food Science and Human Wellness 2024年第4期13卷 2048-2059页

作者： Xueyan Mo Mengcheng Zhou Yanmei Li Lili Yu Huashang Bai Peihong Shen Xing Zhou Haojun Zhu Huijie Sun Ru Bu Chengjian Jiang state key laboratory for conservation and Utilization of Subtropical Agro-Bioresources Guangxi Research Center for Microbial and Enzyme Engineering TechnologyCollege of Life Science and TechnologyGuangxi UniversityNanning 530004China National Engineering Research center for Non-Food Biorefinery State Key Laboratory of Non-Food Biomass and Enzyme TechnologyGuangxi Research Center for Biological Science and TechnologyGuangxi Academy of SciencesNanning 530007China Guangxi key laboratory for Green Processing of Sugar resources College of Biological and Chemical EngineeringGuangxi University of Science and TechnologyLiuzhou 545006China

The application of microorganisms as probiotics is limited due to lack of safety ***,a novel multi-stress-tolerant yeast Meyerozyma guilliermondii GXDK6 with aroma-producing properties was identified from marine mangrove *** safety and probiotic properties were assessed in accordance with phenotype and whole-genome sequencing *** showed that the genes and phenotypic expression of related virulence,antibiotic resistance and retroelement were rarely *** morphogenesis genes(SIT4,HOG1,SPA2,ERK1,ICL1,CST20,HSP104,TPS1,and RHO1)and phospholipase secretion gene(VPS4)were *** hyphae and phospholipase were *** one retroelement(Tad1-65_BG)was *** biogenic amines(BAs)encoding genes were absent,except for spermidine synthase(JA9_002594),spermine synthase(JA9_004690),and tyrosine decarboxylase(inx).The production of single BAs and total BAs was far below the food-defined ***6 had no resistance to common antifungal *** enzymes,such as gelatinase,DNase,hemolytic,lecithinase,and thrombin were *** toxicity test with mice demonstrated that GXDK6 is ***6 has a good reproduction ability in the simulation gastrointestinal ***6 also has a strong antioxidant ability,β-glucosidase,and inulinase *** sum up,GXDK6 is considered as a safe probiotic for human consumption and food fermentation.

关键词： Meyerozyma guilliermondii Safety assessment Probiotics Marine mangrove microorganisms Whole-genome sequencing analysis

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