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ERF5 enhances protocorm-like body regeneration via enhancement of STM expression in Dendrobium orchid

Journal of Integrative Plant Biology 2023年第9期65卷 2071-2085页

作者： Danqi Zeng Can Si Mingze Zhang Jun Duan Chunmei He Key Laboratory of South china Agricultural Plant Molecular Analysis and Genetic Improvement&Guangdong Provincial Key Laboratory of Applied Botany South China Botanical GardenChinese Academy of SciencesGuangzhou 510650China University of the Chinese Academy of Sciences Beijing 100049China South china National botanical garden Guangzhou 510650China Center of Economic Botany Core Botanical GardensChinese Academy of SciencesGuangzhou 510650China

Orchid plants develop protocorms upon germination and produce protocorm-like structures called protocorm-like bodies(PLBs)from protocorms and somatic cells via tissue ***-like bodies have broad technical application potential in the orchid industry and their regeneration is a distinct developmental process in the plant ***,little is known about this unparalleled developmental *** this study,we identified a PLB-abundant gene,ethylene response factor(ERF),and a transcription factor named Do ERF5,and determined its important role in PLB regeneration in Dendrobium *** of Do ERF5 in Dendrobium greatly enhanced the PLB regeneration from PLB and stem explants,and upregulated the expression of WOUND-INDUCED DEDIFFERENTIATION(Do WIND)homologs and SHOOT MERISTEMLESS(Do STM),as well as the genes involved in cytokinin biosynthesis(Do IPT)and the cytokinin response factors(Do ARRs).However,silencing Do ERF5 reduced the regeneration rate of PLBs,and downregulated the expression of Do WIND homologs,Do STM and Do *** demonstrated that Do ERF5 is directly bound to the Do STM promoter and regulates its *** addition,overexpression of Do STM in Dendrobium orchid resulted in favorable regeneration of *** results clarify that Do ERF5 regulates the regeneration of PLB by enhancing Do STM *** findings provide new insights into how Do ERF5 mediates PLB regeneration and offers technical potential in improving clonal propagation,preservation,and the bioengineering of orchids.

关键词： EMSA ERF transcription factor orchid protocormlikebody STM

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The Response Difference of Mitochondria in Recalcitrant Antiaris toxicaria Axes and Orthodox Zea mays Embryos to Dehydration Injury

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Journal of Integrative Plant Biology 2009年第7期51卷 646-653页

作者： Song-Quan Song Mei-Hua Tian Jing Kan Hong-Yan Cheng Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Xishuangbanna Tropical botanical garden the Chinese Academy of Sciences Mengla 666303 China

Long-term preservation of recalcitrant seeds is very difficult because the physiological basis on their desiccation sensitivity is poorly understood. Survival of Antiaris toxicaria axes rapidly decreased and that of immature maize embryos very slowly decreased with dehydration. To understand their different responses to dehydration, we examined the changes in mitochondria activity during dehydration. Although activities of cytochrome （Cyt） c oxidase and malate dehydrogenase of the A. toxicaria axis and maize embryo mitochondria decreased with dehydration, the parameters of maize embryo mitochondria were much higher than those of A. toxicaria, showing that the damage was more severe for the A. toxicaria axis mitochondria than for those of maize embryo. The state I and III respiration of the A. toxicaria axis mitochondria were higher than those of maize embryo, the former rapidly decreased, and the latter slowly decreased with dehydration. The proportion of Cyt c pathway to state III respiration for the A. toxicaria axis mitochondria was low and rapidly decreased with dehydration, and the proportion of alternative oxidase pathway was high and slightly increased with dehydration. In contrast, the proportion of Cyt c pathway for maize embryo mitochondria was high, and that of alternative oxidase pathway was low. Both pathways decreased slowly with dehydration.

关键词： alternative oxidase pathway cytochrome c oxidase pathway dehydration mitochondria orthodox recalcitrance respiration rate seed.

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N^2-(1-Methoxycarbonylethyl)guanosine,a new nucleoside coupled with an amino acid derivative from Amanita exitialis

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Chinese Chemical Letters 2009年第7期20卷 830-832页

作者： Yu Lang Chi Hui Ye Zhang Jing Hua Xue Jing Hao Mei Fang Liu Xiao Yi Wei South china botanical garden Chinese Academy of Sciences Guangzhou 510650 China Graduate School of Chinese Academy of Sciences Beijing 100049 China

A new purine nucleoside coupled with an amino acid derivative, N^2-（l-methoxycarbonylethyl）guanosine 1, along with β- carboline and russulaceramide was isolated from the fruiting bodies of Amanita exitialis, a newly described poisonous mushroom. Its structure was elucidated by spectroscopic methods. This is the first report of naturally occurring nucleosides in which an a-amino acid derivative is bonded through its a-amino nitrogen to a nucleobase aglycone by a C-N bond. The new compound was found to be toxic in brine shrimp lethality test （BST）. C 2009 Published by Elsevier B.V. on behalf of Chinese Chemical Society.

关键词： N^2-(1-Methoxycarbonylethyl)guanosine Guanosine Purine alkaloid Nucleoside Amanita Amanita exitialis

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ORDINATION AND GRADIENT ANALYSIS OF CONIFEROUS FOREST IN DAXINGANLING

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Journal of Northeast Forestry University 1992年第1期3卷 42-47页

作者： Yang Guoting Chen XiangweiNortheast Forestry UniversityZhou Danbotanical garden of Heilongjiang Province 1. Northeast Forestry University China 2. botanical garden of Heilongjiang Province China

In this paper,the quantitative approach is applied on the study of coniferous forestbased on the data which were collected by the field investigation in Daxinganling *** mainpurpose is objectively to show the position of communities in the space and the relationship be-tween the community and *** means of ordination,it is found that dahurian larch for-est,mongolian scots pine forest and korean fir forest lie in different positions. Gradient analysis ofthree dominant types of conigerous forest has revealed the difference of ecological amplitude,thedifference is one of the important reasons that determine the different communities in the differentenvironment.

关键词： Ordination Gradient analysis Coniferous forest

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Preliminary Response of Soil Fauna to Simulated N Deposition in Three Typical Subtropical Forests

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Pedosphere 2006年第5期16卷 596-601页

作者： XU Guo-Liang MO Jiang-Ming ZHOU Guo-Yi FU Sheng-Lei Institute of Ecology South China Botanical Garden Chinese Academy of Sciences Guangzhou 510650 （China） Graduate School of the Chinese Academy of Sciences Beijing 100039 （China）

A field-scale experiment arranged in a complete randomized block design with three N addition treatments including a control (no addition of N), a low N (5 g m-2 year-1), and a medium N (10 g m-2 year-1) was performed in each of the three typical forests, a pine (Pinus massoniana Lamb.) forest (PF), a pine-broadleaf mixed forest (MF) and a mature monsoon evergreen broadleaf forest (MEBF), of the Dinghushan Biosphere Reserve in subtropical china to study the response of soil fauna community to additions of N. Higher NH4+ and NO3- concentrations and a lower soil pH occurred in the medium N treatment of MEBF, whereas the NO3- concentration was the lowest in PF after the additions of N. The response of the density, group abundance and diversity index of soil fauna to addition of N varied with the forest type, and all these variables decreased with increasing N under MEBF but the trend was opposite under PF. The N treatments had no significant effects on these variables under MF. Compared with the control plots, the medium N treatment had significant negative effect on soil fauna under MEBF. The group abundance of soil fauna increased significantly with additions of higher N rates under PF. These results suggested that the response of soil fauna to N deposition varied with the forest type and N deposition rate, and soil N status is one of the important factors affecting the response of soil fauna to N deposition.

关键词： Dinghushan Biosphere Reserve N deposition soil fauna subtropical china

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Transcriptomics:Advances and approaches

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Science china(Life Sciences) 2013年第10期56卷 960-967页

作者： DONG ZhiCheng CHEN Yan Key Laboratory of Plant Resources Conservation and Sustainable Utilization South China Botanical GardenChinese Academy of Sciences

Transcriptomics is one of the most developed fields in the post-genomic *** is the complete set of RNA transcripts in a specific cell type or tissue at a certain developmental stage and/or under a specific physiological condition,including messenger RNA,transfer RNA,ribosomal RNA,and other non-coding *** focuses on the gene expression at the RNA level and offers the genome-wide information of gene structure and gene function in order to reveal the molecular mechanisms involved in specific biological *** the development of next-generation high-throughput sequencing technology,transcriptome analysis has been progressively improving our understanding of RNA-based gene regulatory ***,we discuss the concept,history,and especially the recent advances in this inspiring field of study.

关键词： transcriptomics next-generation sequencing (NGS) non-coding RNA RNA-seq

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Safeguarding our future by protecting biodiversity

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Plant Diversity 2020年第4期42卷 221-228页

作者： Richard T.Corlett Center for Integrative Conservation Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglaYunnan666303China Center of Conservation Biology Core Botanical GardensChinese Academy of SciencesMenglaYunnan666303China

The Anthropocene is marked by twin crises:climate change and biodiversity *** change has tended to dominate the headlines,reflecting,in part,the greater complexity of the biodiversity *** itself is a difficult *** plants dominate the global biomass and terrestrial arthropods probably dominate in terms of numbers of species,but most of the Tree of Life consists of single-celled eukaryotes,bacteria,and *** plants provide a huge variety of products and services to people,ranging from those that are species-specific,such as food,medicine,and genetic resources,to many which are partly interchangeable,such as timber and forage for domestic animals,and others which depend on the whole community,but not on individual species,such as regulation of water supply and carbon *** use of information from remote sensing has encouraged a simplified view of the values of nature's contributions to people,but this does not match the way most people value *** can currently estimate the proportion of species threatened by human impacts only for a few well-assessed groups,for which it ranges from 14%(birds)to 63%(cycads).Less than 8%of land plants have been assessed,but it has been estimated that 30e44%are threatened,although there are still few(0.2%)well-documented *** for improving protection of biodiversity include:improving the inventory,with surveys focused on geographical areas and taxonomic groups which are under-collected;expanding the protected area system and its representativeness;controlling overexploitation;managing invasive species;conserving threatened species ex situ;restoring degraded ecosystems;and controlling climate *** Convention on Biological Diversity(CBD)COP15 and the United Nations Framework Convention on Climate Change(UNFCCC)COP26 meetings,both postponed to 2021,will provide an opportunity to address both crises,but success will require high ambition from all participants.

关键词： Anthropocene Climate change Conservation Ecosystem services Values

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Species and Organ Diversity in the Effects of Hydrogen Peroxide on Superoxide Dismutase Activity In Vitro

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Journal of Integrative Plant Biology 2006年第6期48卷 672-678页

作者： Hong-Yan Cheng Song-Quan Song Xishuangbanna Tropical botanical garden the Chinese Academy of Sciences Mengla Yunnan 666303 China Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

Superoxlde dlsmutase （SOD） is ubiquitous in aerobic organisms and constitutes the first link In the enzyme scavenging system of reactive oxygen species. In the present study, species and organ diversity of SOD activity In a solution and In an in-gel assay system, as well as the effects of hydrogen peroxide （H202） on SOD activity, were Investigated. In a solution assay system, SOD activity of jackfruIt root, shoot, leaves, axes, and cotyledons, of maize embryos and endosperms, of mung bean leaves and seeds, of sacred lotus axes and cotyledons, and of rice and wheat leaves was Increased by 1-15 mmol/L H2O2. However, SOD activity In rice root and seeds, maize roots and leaves, mung bean roots and shoots, and wheat seeds was decreased by 1-15 mmol/L H2O2. The SOD activity of wheat root and soybean roots, leaves, axes, and cotyledons was Increased by 1-4 mmol/L H2O2, but was decreased by concentrations of H2O2 〉4 mmol/L. The SOD activity of soybean shoots was not affected by 1-15 mmol/L H2O2. The SOD activity In crude mltochondrla of jackfruIt, maize, and upas seeds, as well as In purified mitochondria of jackfruIt, was also Increased by 1-15 mmol/L H2O2. In the In-gel assay system, the SOD In jackfruIt cotyledons was comprised of Mn-SOD, Cu/Zn-SOD, and Fe-SOD, the crude mltochondria of jackfruit seeds and maizes embryo was comprised of Mn-SOD and Cu/ Zn-SOD, and the crude mltochondria of maize seeds was comprised of Mn-SOD only. In the present study, H2O2 markedly Inhibited Cu/Zn-SOD and Fe-SOD activity.

关键词： hydrogen peroxide inhibitor informative in-gel assay system solution assay system species and organ diversity superoxide dismutase activity.

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Effects of fragmentation on the seed predation and dispersal by rodents differ among species with different seed size

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Integrative Zoology 2017年第6期12卷 468-476页

作者： Qiong CHEN Kyle W.TOMLINSON Lin CAO Bo WANG Center for Integrative Conservation Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglaYunnanChina University of Chinese Academy of Sciences BeijingChina

Fragmentation influences the population dynamics and community composition of vertebrate ***mentation effects on rodent species in forests may,in turn,affect seed predation and dispersal of many plant *** studies have usually addressed this question by monitoring a single species,and their results are *** few studies have discussed the fragmentation effect on rodent-seed interaction among tree species with different seed sizes,which can significantly influence rodent foraging preference and seed *** that fruiting periods for many coexisting plant species overlap,the changing foraging preference of rodents may substantially alter plant *** this study,we monitored the dispersal and predation by rodents of 9600 seeds,belonging to 4 Fagaceae species with great variation in seed size,in both the edge and interior areas of 12 tropical forest fragments ranging in area from 6.3 to 13872.9 ha in Southwest *** results showed that forest fragmentation altered the seed fates of all the species,but the intensity and even the direction of fragmentation effect differed between species with large versus small *** the seeds harvested,fragment size showed negative effects in forest interiors but positive effects at edges for the 2 large-seeded species,but showed little effect for the 2 small-seeded *** the seeds removed,negative effects of fragment size only existed among the small-seeded *** different fragmentation effect on seed dispersal and predation among plant species may,in turn,translate into the composition differences of the regeneration of the whole fragmented forest.

关键词： edge effect forest fragmentation plant-rodent interaction seed size

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Effects of environment and genotype-by-environment interaction on phenotype of Rorippa elata(Brassicaceae),an endemic alpine plant in the Hengduan mountains

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Journal of Plant Ecology 2024年第4期17卷 42-55页

作者： Zhi-Qiang Du Yao-Wu Xing Ting-Shen Han CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Plant Diversity and Specialty Crops Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303China

Global climate change poses a severe threat to mountain *** plasticity and local adaptation are two common strategies for alpine plant to cope with such *** may facilitate organismal adaptation to contrasting environments,depending on the influences of the environment or genotype or their interacted *** this study,we use an endemic alpine plant(Rorippa elata)in the Hengduan mountains(HDM)to unravel its phenotypic basis of adaptation strategy and evaluate the relative contributions of environment and genotype to its *** transplanted 37 genotypes of *** into two common gardens across low and high elevations(2800 vs.3800 m)during *** fitness-related traits were measured,including flowering probability and glucosinolates(GS)*** estimated the environmental or genotypic contributions to the phenotype and identified the main environmental *** results revealed that both environment and genotype-by-environment interactions contributed to the phenotypes of *** heterogeneity was identified as a key factor that explained 24%of the total phenotypic *** particular,genotypes of the northern HDM showed significantly higher plasticity in flowering probability than those of the southern ***,within the southern HDM,GS content indicated local adaptation to herbivory stresses for *** genotypes along *** conclusion,our results suggest that *** may have adapted to the alpine environment through species-level plasticity or regional-level local *** processes were shaped by either complex topography or interactions between genotype and mountain *** study provides empirical evidence on the adaptation of alpine plants.

关键词： alpine plant common garden genotype-by-environment Hengduan mountains local adaptation phenotypic plasticity

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