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Effects of High-Temperature Stress on Photosynthetic Characteristics and Antioxidant Enzyme System of Paeonia ostii

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Phyton-International Journal of Experimental Botany 2022年第3期91卷 599-615页

作者： Xiaoxiao Wang Ziwen Fang Daqiu Zhao Jun Tao College of Horticulture and plant Protection Yangzhou UniversityYangzhou225009China Joint International Research laboratory of Agriculture and Agri-Product Safety The Ministry of Education of ChinaYangzhou UniversityYangzhou225009China

Paeonia ostii is an economically important oil crop,which has been widely cultivated in the middle and lower reaches of the Yangtze River in China in recent *** *** is highly adaptable to the environment,the prolonged high summer temperature in this region severely inhibits its growth,which adversely affects seed yield and *** this study,*** plants were subjected to 20℃/15℃(day/night)and 40℃/35℃(day/night)temperatures for 15 *** changes in physiological and biochemical indicators of *** under high-temperature stress were initially *** results showed that with the deepening of leaf etiolation,chlorophyll a and chlorophyll b concentration,carotenoid concentration,Soil plant Analysis Development(SPAD)values and leaf relative water content decreased significantly,while both relative electrical conductivity(REC)and free proline concentration showed an upward ***,the continuous accumulation of reactive oxygen species(ROS)in *** plants,led to an increased activity of antioxidant enzymes including superoxide dismutase(SOD),peroxidase(POD),catalase(CAT)and ascorbate peroxidase(APX).Moreover,with the extension of the high-temperature treatment,the anatomical structures of *** were destroyed,resulting in a decreased photochemical efficiency of the photosystem II(PSII)reaction center and photosynthesis was *** together,these results provide reference values for understanding the physiological response of *** to hightemperature stress and establish a foundation for further research on the relevant underlying molecular mechanisms.

关键词： Antioxidant enzymes membrane damage photosynthesis reactive oxygen species

Mechanisms simultaneously regulate smooth muscle proliferation and differentiation

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The Journal of Biomedical Research 2014年第1期28卷 40-46页

作者： Ning Shi Shi-You Chen Department of physiology & Pharmacology University of Georgia

Vascular smooth muscle cell （VSMC） differentiation and proliferation are two important physiological proc- esses during vascular development. The phenotypic alteration from differentiated to proliferative VSMC contrib- utes to the development of several major cardiovascular diseases including atherosclerosis, hypertension, resteno- sis after angioplasty or bypass, diabetic vascular complications, and transplantation arteriopathy. Since the VSMC phenotype in these pathological conditions resembles that of developing VSMC during embryonic development, understanding of the molecular mechanisms that control VSMC differentiation will provide fundamental insights into the pathological processes of these cardiovascular diseases. Although VSMC differentiation is usually ac- companied by an irreversible cell cycle exit, VSMC proliferation and differentiation occur concurrently during embryonic development. The molecular mechanisms simultaneously regulating these two processes, however, remain largely unknown. Our recent study demonstrates that cell division cycle 7, a key regulator of cell cycle, promotes both VSMC differentiation and proliferation through different mechanisms during the initial phase of VSMC differentiation. Conversely, Kriappel-like factor 4 appears to be a repressor for both VSMC differentia- tion and proliferation. This review attempts to highlight the novel role of cell division cycle 7 in TGF-β-induced VSMC differentiation and proliferation. The role of K141ppel-like factor 4 in suppressing these two processes will also be discussed.

关键词： vascular smooth muscle differentiation proliferation cell division cycle 7 Krfippel-like factor 4

Integration of light and hormone signaling pathways in the regulation of plant shade avoidance syndrome

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aBIOTECH 2021年第2期2卷 131-145页

作者： Yang Liu Feresheeh Jafari Haiyang Wang Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081China State key laboratory for Conservation and Utilization of Subtropical Agro-Bioresources South China Agricultural UniversityGuangzhou 510642China Guangdong laboratory for Lingnan Modern Agriculture Guangzhou 510642China

As sessile organisms,plants are unable to move or escape from their neighboring competitors under high-density planting ***,they have evolved the ability to sense changes in light quantity and quality(such as a reduction in photoactive radiation and drop in red/far-red light ratios)and evoke a suite of adaptative responses(such as stem elongation,reduced branching,hyponastic leaf orientation,early flowering and accelerated senescence)collectively termed shade avoidance syndrome(SAS).Over the past few decades,much progress has been made in identifying the various photoreceptor systems and light signaling components implicated in regulating SAS,and in elucidating the underlying molecular mechanisms,based on extensive molecular genetic studies with the model dicotyledonous plant Arabidopsis ***,an emerging synthesis of the field is that light signaling integrates with the signaling pathways of various phytohormones to coordinately regulate different aspects of *** this review,we present a brief summary of the various cross-talks between light and hormone signaling in regulating *** also present a perspective of manipulating SAS to tailor crop architecture for breeding high-density tolerant crop cultivars.

关键词： Arabidopsis Shade avoidance syndrome(SAS) Light Hormones Signaling

The transcription factor OpWRKY2 positively regulates the biosynthesis of the anticancer drug camptothecin in Ophiorrhiza pumila

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Horticulture Research 2021年第1期8卷 83-96页

作者： Xiaolong Hao Chenhong Xie Qingyan Ruan Xichen Zhang Chao Wu Bing Han Jun Qian Wei Zhou Hans-Wilhelm Nutzmann Guoyin Kai laboratory of Medicinal plant Biotechnology College of PharmacyZhejiang Chinese Medical University310053 HangzhouChina Institute of plant Biotechnology School of Life SciencesShanghai Normal University200234 ShanghaiChina The Milner Centre for Evolution Department of Biology and BiochemistryUniversity of BathClaverton DownBath BA27AYUK

The limited bioavailability of plant-derived natural products with anticancer activity poses major challenges to the pharmaceutical *** example of this is camptothecin,a monoterpene indole alkaloid with potent anticancer activity that is extracted at very low concentrations from woody ***,camptothecin biosynthesis has been shown to become biotechnologically amenable in hairy-root systems of the natural producer Ophiorrhiza ***,time-course expression and metabolite analyses were performed to identify novel transcriptional regulators of camptothecin biosynthesis in *** is shown here that camptothecin production increased over cultivation time and that the expression pattern of the WRKY transcription factor encoding gene OpWRKY2 is closely correlated with camptothecin *** of OpWRKY2 led to a more than three-fold increase in camptothecin ***,silencing of OpWRKY2 correlated with decreased camptothecin levels in the *** detailed molecular characterization by electrophoretic mobility shift,yeast one-hybrid and dual-luciferase assays showed that OpWRKY2 directly binds and activates the central camptothecin pathway gene *** together,the results of this study demonstrate that OpWRKY2 acts as a direct positive regulator of camptothecin *** such,a feasible strategy for the over-accumulation of camptothecin in a biotechnologically amenable system is presented.

关键词： camptothecin enable alkaloid

Self S‑RNase reduces the expression of two pollen‑specific COBRA genes to inhibit pollen tube growth in pear

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molecular Horticulture 2023年第1期3卷 39-50页

作者： Lei Wu Ying Xu Kaijie Qi Xueting Jiang Min He Yanbo Cui Jianping Bao Chao Gu Shaoling Zhang Centre of Pear Engineering Technology Research State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjingJiangsuChina College of Life Sciences Nanjing Agricultural UniversityNanjingJiangsuChina Nanjing Ningcui Biological Seed Company Limited NanjingJiangsuChina College of plant Science Tarim UniversityAlaerXinjiang 843300China

Due to self-incompatibility(SI)prevents self-fertilization,natural or artificial cross-pollination has been conducted in many orchards to stabilize fruit ***,it is still puzzled which routes of self S-RNase arresting pollen tube ***,17 COBRA genes were isolated from pear *** these genes,the pollen-specifically expressed PbCOB.A.1 and PbCOB.A.2 positively mediates pollen tube *** promoters of PbCOB.A.1 and/or PbCOB.A.2 were bound and activated by PbABF.E.2(an ABRE-binding factor)and PbC2H2.K16.2(a C2H2-type zinc finger protein).Notably,the expressions of PbCOB.A.1,PbCOB.A.2,and PbC2H2.K16.2 were repressed by self S-RNase,suggesting that self S-RNase reduces the expression of PbCOB.A.1 and PbCOB.A.2 by decreasing the expression of their upstream factors,such as PbC2H2.K16.2,to arrest pollen tube ***.A.1 or PbCOB.A.2 accelerates the growth of pollen tubes treated by self S-RNase,but can hardly affect level of reactive oxygen species and deploymerization of actin cytoskeleton in pollen tubes and cannot physically interact with any reported proteins involved in *** results indicate that PbCOB.A.1 and PbCOB.A.2 may not relieve S-RNase toxicity in incompatible pollen *** information provides a new route to elucidate the arresting pollen tube growth during SI reaction.

关键词： Pyrus Self-incompatibility COBRA C2H2-type zinc finger protein Pollen tube growth S-RNase

Soil water deficit and vegetation restoration in the refuse dumps of the Heidaigou open-pit coal mine,Inner Mongolia,China

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Research in Cold and Arid Regions 2016年第1期8卷 22-35页

作者： Lei Huang Shapotou Desert Research and Experimental Station Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of SciencesLanzhouGansu 730000China key laboratory of Stress physiology and Ecology in Cold and Arid Regions of Gansu Province LanzhouGansu 730000China

The sustainability of ecosystem restoration of refuse dumps in open-pit coal mines depends on plant species selection, their configuration, and the optimal usage of water resources. This study is based on field experiments in the northern refuse dump of the Heidaigou open-pit coal mine in Inner Mongolia of China established in 1995. Eight plant configurations, including trees, shrubs, grasses, and their combinations, as well as the adjacent community of natural vegetation, were selected. The succession of the revegetated plants, soil water storage, the spatiotemporal distribution of plant water deficits degree and its compensation degree were also studied. Results indicated that the vegetation cover （shrubs and herbaceous cover）, richness, abundance, soil nutrients （soil organic matter, N and P）, and biological soil crust coverage on the soil surface are significantly influenced by the vegetation configurations. The average soil water storage values in the shrub ＋ grass and grass communities throughout the growing season are 208.69 mm and 206.55 mm, which are the closest to that of in the natural vegetation community （215.87 mm）. plant water deficits degree in the grass and shrub ＋ grass communities were the lowest, but the degrees of water deficit compensation in these configuration were larger than those of the other vegetation configurations. Differences in plant water deficit degree and water compensation among the different config- urations were significant （P 〈0.05）. plant water deficit degrees were predominantly minimal on the surface, increased with increasing soil depth, and remained stable at 80 cm soil depth. The soil moisture compensation in the natural vegetation, shrub ＋ grass, and grass communities changed at 10%, while that in other vegetation communities changed between 20% and 40%. Overall, we conclude that the shrub ＋ grass and grass configuration modes are the optimal vegetation restoration models in terms of ecohydrology for future ecological en

关键词： refuse dumps soil water storage plant water deficit degree plant water compensation degree vegetation configurations

Comparative population genomics between cultivated and wild rice

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Comparative population genomics between cultivated and wild ...

CsPrx25,a class III peroxidase in Citrus sinensis,confers resistance to citrus bacterial canker through the maintenance of ROS homeostasis and cell wall lignification

第十四届全国植物基因组学大会

作者： Xuehui Huang Xinghua Wei Nori Kurata Zixuan Wang Qiang Zhao Yan Zhao Ahong Wang Tingting Lu Qi Feng Bin Han National Center for Gene Research Institute of Plant Physiology and EcologyShanghai Institutes for Biological SciencesChinese Academy of Sciences State key laboratory of Rice Biology China National Rice Research InstituteChinese Academy of Agricultural Sciences

The domestication of cultivated rice is an important event in human ***, its origins and domestication processes have long been *** generate genome sequences from 446 accessions of the wild rice species Oryza rufipogo... 详细信息

关键词： rice genome GWAS domestication

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Horticulture Research 2020年第1期7卷 130-140页

作者： Qiang Li Xiujuan Qin Jingjing Qi Wanfu Dou Christophe Dunand Shanchun Chen Yongrui He Citrus Research Institute Southwest University/Chinese Academy of Agricultural SciencesChongqing 400712China Laboratoire de Recherche en Sciences Végétales Universitéde ToulouseCNRSUPSAuzeville-Tolosane 31320France key laboratory of plant Hormones and Development Regulation of Chongqing School of Life SciencesChongqing University401331 ChongqingChina

Citrus bacterial canker(CBC)results from Xanthomonas citri ***(Xcc)infection and poses a grave threat to citrus *** III peroxidases(CIII Prxs)are key proteins to the environmental adaptation of citrus plants to a range of exogenous pathogens,but the role of CIII Prxs during plant resistance to CBC is poorly ***,we explored the role of CsPrx25 and its contribution to plant defenses in molecular *** on the expression analysis,CsPrx25 was identified as an apoplast-localized protein that is differentially regulated by Xcc infection,salicylic acid,and methyl jasmone acid in the CBC-susceptible variety Wanjincheng(***)and the CBC-resistant variety Calamondin(***).Transgenic Wanjincheng plants overexpressing CsPrx25 were generated,and these transgenic plants exhibited significantly increased CBC resistance compared with the WT *** addition,the CsPrx25-overexpressing plants displayed altered reactive oxygen species(ROS)homeostasis accompanied by enhanced H_(2)O_(2) levels,which led to stronger hypersensitivity responses during Xcc ***,the overexpression of CsPrx25 enhanced lignification as an apoplastic barrier for Xcc *** together,the results highlight how CsPrx25-mediated ROS homeostasis reconstruction and cell wall lignification can enhance the resistance of sweet orange to CBC.

关键词： sinensis citrus Citrus

Tung Tree(Vernicia fordii) Genome Provides A Resource for Understanding Genome Evolution and Improved Oil Production

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Genomics, Proteomics & Bioinformatics 2019年第6期17卷 558-575页

作者： Lin Zhang Meilan Liu Hongxu Long Wei Dong Asher Pasha Eddi Esteban Wenying Li Xiaoming Yang Ze Li Aixia Song Duo Ran Guang Zhao Yanling Zeng Hao Chen Ming Zou Jingjing Li Fan Liang Meili Xie Jiang Hu Depeng Wang Heping Cao Nicholas J.Provart Liangsheng Zhang Xiaofeng Tan key laboratory of Cultivation and Protection for Non-Wood Forest Trees Ministry of EducationCentral South University of Forestry and TechnologyChangsha 410004China key Lab of Non-wood Forest Products of State Forestry Administration College of ForestryCentral South University of Forestry and TechnologyChangsha 410004China Department of Cell and Systems Biology/Centre for the Analysis of Genome Evolution and Function University of TorontoTorontoOntario M5S 3B2Canada State key laboratory of Ecological Pest Control for Fujian and Taiwan Crops Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyFujian Agriculture and Forestry UniversityFuzhou 350002China College of Forestry Nanjing Forestry UniversityNanjing 210037China Nextomics Biosciences Co. Wuhan 430073China Oil Crop Research Institute Chinese Academy of Agricultural SciencesWuhan 430062China US Department of Agriculture Agricultural Research ServiceSouthern Regional Research CenterNew OrleansLA 70124USA

Tung tree(Vernicia fordii) is an economically important woody oil plant that produces tung oil rich in eleostearic acid. Here, we report a high-quality chromosome-scale genome sequence of tung tree. The genome sequence was assembled by combining Illumina short reads, Pacific Biosciences single-molecule real-time long reads, and Hi-C sequencing data. The size of tung tree genome is 1.12 Gb, with 28,422 predicted genes and over 73% repeat sequences. The V. fordii underwent an ancient genome triplication event shared by core eudicots but no further wholegenome duplication in the subsequent ca. 34.55 million years of evolutionary history of the tung tree lineage. Insertion time analysis revealed that repeat-driven genome expansion might have arisen as a result of long-standing long terminal repeat retrotransposon bursts and lack of efficient DNA deletion mechanisms. The genome harbors 88 resistance genes encoding nucleotide-binding sites;17 of these genes may be involved in early-infection stage of Fusarium wilt resistance. Further, 651 oil-related genes were identified, 88 of which are predicted to be directly involved in tung oil biosynthesis. Relatively few phosphoenolpyruvate carboxykinase genes, and synergistic effects between transcription factors and oil biosynthesis-related genes might contribute to the high oil content of tung seed. The tung tree genome constitutes a valuable resource for understanding genome evolution, as well as for molecular breeding and genetic improvements for oil production.

关键词： Tung tree genome Tung oil Genome evolution Electronic fluorescent pictographic browser Oil biosynthesis