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空间科学学报 2019年第4期39卷 478-488页

作者： XIE Junyan ZHANG Yue ZHENG Huiqiong center for Excellence in Molecular plant Sciences Institute of Plant Physiology and EcologyChinese Academy of Sciences

Gravitropic curvature growth of Arabidopsis hypocotyls mainly occurred in the rapid growing Elongation Zone(EZI),not in the slow-growing Elongation Zone(EZII).By examining reorientation of Microtubules(MT)and phenotype of the cell wall in the EZI and the EZII of Arabidopsis hypocotyls under normal gravitational condition,it is found that MTs in the rapid growing epidermal cells were mainly in the transverse direction,while those in the non-growing epidermal cells were in the longitudinal ***,this difference in cortical MT arrays between the EZI and EZII cells disappeared when the seedlings were exposed to the simulated microgravity condition on a horizontal *** emission scanning electron microscopy revealed that the surface texture of epidermal cells,like the direction of the MT,in the EZI and the EZII also became similar when exposed to the simulated microgravity *** result indicated that simulate microgravity could modify the potential differentiation between the EZI and the EZII by affecting the orientation of cortical MT in the epidermal cells.

关键词： Arabidopsis Cortical microtubule Cell surface texture Hypocotyls Simulated microgravity

Twenty years of rice genomics research: From sequencing and functional genomics to quantitative genomics

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Molecular plant 2022年第4期15卷 593-619页

作者： Changsheng Wang Bin Han National center for Gene Research State Key Laboratory of Plant Molecular GeneticsCenter for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200233China

Since the completion of the rice genome sequencing project in 2005,we have entered the era of rice genomics,which is still in its *** genomics studies can be classified into three stages:structural genomics,functional genomics,and quantitative *** genomics refers primarily to genome sequencing for the construction of a complete map of rice genome *** is fundamental for rice genetics and molecular biology *** genomics aims to decode the functions of rice *** genomics is large-scale sequence-and statistics-based research to define the quantitative traits and genetic features of rice *** genomics has been a transformative influence on rice biological research and contributes significantly to rice breeding,making rice a good model plant for studying crop sciences.

关键词： rice Oryza sativa structural genomics functional genomics quantitative genomics

Stand dynamics of the drought-affected floodplain forests of Araguaia River,Brazilian Amazon

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Forest Ecosystems 2017年第3期4卷 201-210页

作者： Jürgen Homeier Dariusz Kurzatkowski Christoph Leuschner plant ecology Albrecht von Haller Institute for Plant Sciences University of Goettingen

Background： The floodplain forests of Araguaia River, a clear-water river in the southeastern Amazon（Tocantins State, Brazil）, are characterized by seasonal flooding up to 3.5 m height, low nutrient levels in the water, and seasonal drought periods of 4–5 ***： We studied the forest dynamics（tree diameter growth, tree mortality and recruitment） of this unique forest ecosystem over a 5-year period by repeated censuses in 12 permanent plots established along a flooding ***： The cumulative basal area in the plots increased by 0.84（±0.45） m^2·ha^-1·yr^-1（mean ±SD） in the annual y-flooded（AF） plots in lower terrain and by 0.69（±1.00） m^2·ha^-1·yr^-1 in the higher non-annual y flooded（NAF） plots, corresponding to an aboveground biomass increase of 0.81（±0.57） and 0.69（±1.58） Mg·ha^-1·yr^-1 in the AF and NAF plots, indicating a recent carbon sink in the biomass. Mean diameter growth rate was 1.8（±0.44） mm·yr^-1 in the AF and 2.0（±0.56） mm·yr^-1 in the NAF plots（corresponding to a coarse wood production of 1.53（±1.29） and 2.02（±0.52） Mg·ha^-1·yr^-1）,indicating no flooding effect on radial growth. Mean mortality rates in the 5-year period were 1.9（±0.37）·yr^-1 in the AF plots and 1.8（±0.87）%·yr^-1 in the NAF plots with no differences along the flooding gradient. Highest mortalities were registered in the AF plots for the 10–20 cm dbh class（2.4%·yr^-1）, likely as a consequence of flooding,and in the NAF plots for the 40–50 cm dbh class（3.0%·yr^-1）, probably mainly caused by ENSO-related ***： We conclude that these drought-affected tropical floodplain forests have a lower standing biomass and aboveground productivity than central Amazonian floodplain forests in more humid climates, and the imprint of the flooding gradient on stand dynamics is relatively weak, which may result from the lower flooding height and the interaction of flooding with low nutrient supply and periodic drought.

关键词： Amazon Diameter growth Dry season Flooding regime Mortality rate Productivity Tree recruitment

Regulation and integration of plant jasmonate signaling:a comparative view of monocot and dicot

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Journal of Genetics and Genomics 2022年第8期49卷 704-714页

作者： Shiwei Wan Xiu-Fang Xin National Key Laboratory of plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China University of Chinese Academy of Sciences Beijing 100049China CAS-JIC center of Excellence for plant and Microbial Sciences(CEPAMS) Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China

The phytohormone jasmonate plays a pivotal role in various aspects of plant life,including developmental programs and defense against pests and pathogens.A large body of knowledge on jasmonate biosynthesis,signal transduction as well as its functions in diverse plant processes has been gained in the past two *** addition,there exists extensive crosstalk between jasmonate pathway and other phytohormone pathways,such as salicylic acid(SA)and gibberellin(GA),in co-regulation of plant immune status,fine-tuning the balance of plant growth and defense,and so on,which were mostly learned from studies in the dicotyledonous model plants Arabidopsis thaliana and tomato but much less in ***,existing evidence suggests both conservation and functional divergence in terms of core components of jasmonate pathway,its biological functions and signal integration with other phytohormones,between monocot and *** this review,we summarize the current understanding on JA signal initiation,perception and regulation,and highlight the distinctive characteristics in different lineages of plants.

关键词： Jasmonate Phytohormone Signaling Crosstalk plant defense Development Stress response

Phosphatidic acid plays key roles regulating plant development and stress responses

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Journal of Integrative plant Biology 2018年第9期60卷 851-863页

作者： Hong-Yan Yao Hong-Wei Xue National Key Laboratory of plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China

Phospholipids, including phosphatidic acid （PA）, phosphatidylcholine （PC）, phosphatidylethanolamine （PE）, phosphatidylglycerol （PC）, phosphatidylserine （PS） and phosphoinositides, have emerged as an important class of cellular messenger molecules in various cellular and physiological processes, of which PA attracts much attention of researchers. In addition to its effect on stimulating vesicle trafficking, many studies have demonstrated that PA plays a crucial role in various signaling pathways by binding target proteins and regulating their activity and subcellular localization. Here, we summarize the functional mechanisms and target proteins underlying PA-mediated regulation of cellular signaling, development, hormonal responses, and stress responses in plants.

关键词： PA ABA Phosphatidic acid plays key roles regulating plant development and stress responses

Lipidomic profiling analysis reveals the dynamics of phospholipid molecules in Arabidopsis thaliana seedling growth

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Journal of Integrative plant Biology 2016年第11期58卷 890-902页

作者： Yi-Sheng Wang Hong-Yan Yao Hong-Wei Xue National Key Laboratory of plant Molecular Genetics CAS Center for Excellence in Molecular Plant Sciences Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences

High-throughput lipidomic profiling provides a sensitive approach for discovering minor lipid species. By using an advance in electrospray ionization tandem mass spectrome- try, a large set of phospholipid molecular species （126 species） with high resolution were identified from Arabidopsis seedling; of them 31 species are newly identified （16 are unique in plants）, including 13 species of phosphatidic acid （PA）, nine phosphati- dylcholine, six phosphatidylinositol and three phosphatidylser- ine. Further analysis of the lipidomic profile reveals dynamics of phospholipids and distinct species alterations during seedling development. PA molecules are found at the lowest levels in imbibition and follow an increasing trend during seedling growth, while phosphatidylethanolamine （PE） molecules show the opposite pattern with highest levels at imbibition and a general decreasing trend at later stages. Of PA molecular species, 34：2-, 34：3-, 36：4, 36：5-, 38：3- and 38：4-PA increase during radicle emergence, and 34：2- and 34：3-PA reach highest levels during hypocotyl and cotyledon emergence from the seed coat. Conversely, molecular species of PE show higher levels in imbibition and decrease in later stages. These results suggest the crucial roles of specific molecular species and homeostasis of phospholipid molecules in seedling growth and provide insights into the mechanisms of how phospholipid molecules are involved in regulating plant development.

关键词： Arabidopsis seedling electrospray ionization massspectrometry lipidomic profile phospholipids

Genome editing in insects: current status and challenges

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National Science Review 2019年第3期6卷 399-401页

作者： Jun Xu Xia Xu Shuai Zhan Yongping Huang CAS Key Laboratory of Insect Developmental and Evolutionary Biology CAS Center for Excellence in Molecular Plant Sciences Shanghai Institute of Plant Physiology and Ecology Chinese Academy of Sciences

Insects constitute the largest group in the animal kingdom, and include many economically important species as well as pests. This abundance provides largescale genetic resources, and research on insects is beneficial from the perspectives of human health, agricultural production and basic science (Fig.1).The availability of many genetic tools has made Drosophila melanogaster a crucially important model organism

关键词： Genome editing in insects current status and challenges

MicroRNA-2738 regulates gene expression in the sex determination pathway in Bombyx mori

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Insect Science 2020年第4期27卷 646-654页

作者： Zu-Lian Liu Jun Xu Lin Ling De-Hong Yang Shu-Qing Chen Yong-Ping Huang CAS Key Laboratory of Insect Developmental and Evolutionary Biology CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyCASShanghaiChina

MicroRNAs(miRNAs)are a class of short,non-coding transcripts that bind to B'-untranslated regions to trigger messenger RNA degradation or translational *** we explored how miRNAs regulate sex determination in Bombyx mori,a lepidopteran model *** known to be involved in sex determination,BmPSI,Bmdsx,and BmMasc\are predicted targets of the species-specific *** a dual luciferase reporter assay in HEK293T cells,we confirmed that miR-2738 suppressed transcription of BmPSl,Bmdsx,and *** levels of BniPSI and BmMasc were significantly down-regulated in *** miR-2738 *** contrast,the genetic disruption of miR-2738 using the clustered regularly interspaced short palindromic repeats(CRISPR)/CRISPR-associated protein 9 transgenic system increased the levels of BmPSI and BmMasc transcripts,whereas splicing of Bmdsx was unaltered by miR-2738 depletion or *** together,this study implicates miR-2738 as a minor regulator of sex determination genes in the silkworm.

关键词： CRISPR/Cas9 miRNA sex determination silkworm

Rice miR394 suppresses leaf inclination through targeting an F-box gene, LEAF INCLINATION 4

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Journal of Integrative plant Biology 2019年第4期61卷 406-416页

作者： Li Qu Li-Bi Lin Hong-Wei Xue National Key Laboratory of plant Molecular Genetics CAS Center for Excellence in Molecular Plant Sciences Shanghai Institute of Plant Physiology and Ecology the Chinese Academy of Sciences University of the Chinese Academy of Sciences

Rice leaf inclination is an important agronomic trait, closely related to plant architecture and *** of genes controlling leaf inclination would assist in crop improvement. Although various factors,including the plant hormones auxin and brassinosteroids,have been shown to regulate lamina joint development,the role of microRNAs in regulating leaf inclination remains largely unknown. Here, we functionally characterize the role of rice miR394 and its target, LEAF INCLINCATION 4(LC4), which encodes an F-box protein, in the regulation of leaf inclination. We show that miR394 and LC4 work,antagonistically, to regulate leaf lamina joint development and rice architecture, by modulating expansion and elongation of adaxial parenchyma cells. Suppressed expression of miR394, or enhanced expression of LC4,results in enlarged leaf angles, whereas reducing LC4 expression by CRISPR/Cas9 leads to reduced leaf inclination, suggesting LC4 as candidate for use in rice architecture improvement. LC4 interacts with SKP1, a component of the SCF E3 ubiquitin ligase complex, and transcription of both miR394 and LC4 are regulated by auxin. Rice plants with altered expression of miR394 or LC4 have altered auxin responses, indicating that the miR394-LC4 module mediates auxin effects important for determining rice leaf inclination and architecture.

关键词： Rice miR394 F-box gene LEAF INCLINATION 4

WUSCHEL: the versatile protein in the shoot apical meristem

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Science China(Life Sciences) 2021年第1期64卷 177-178页

作者： Lin Xu National Key Laboratory of plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyChinese Academy of SciencesShanghai200032China

In vascular plants, almost all above-ground organs are derived from the shoot apical meristem (SAM). The developmental role of the SAM has been extensively studied,especially in the model dicot plant Arabidopsis thali... 详细信息

关键词： versatile organs