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drought tolerance in three hybrid poplar clones submitted to different watering regimes

Journal of Plant Ecology 2010年第2期3卷 79-87页

作者： Xiao-Yun Guo Xin-Shi Zhang Zhen-Ying Huang State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China Graduate University of Chinese Academy of Sciences Beijing 100049China

Aims Poplars grownin North Chinamay experience water-deficient periods in their life *** aim of the present paper was to quantify the response of three clones to different watering regimes and to determine whichcloneamongthe three is the best adapted to drought *** Three hybrid poplar clones(clone DN-34,R-247 and OP-367)were used in the present *** seedlings of the three clones were grown under four watering regimes:control(well watered,100%field water capacity(FC))and three drought treatments(drought stress I,50%FC;drought stress II,40%FC;drought stress III,30%FC).Changes in morphological,physical and biochemical indicators of the three hybrid poplar clones were *** Findings drought treatment(50%,40%and 30%FC)decreased net photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(gs),shoot height,total biomass and chlorophyll(Chl)content in all the three clones and it increased activities of antioxidant enzymes and free proline *** highest values of the above-mentioned morphological and physiological parameters were recorded in clone OP-367 under 30%FC,followed by clone DN-34 and *** leaf water content(RWC)and stem diameter(sd)markedly declined in clone R-247 and DN-34 under drought stress I,II and III,whereas RWC and sd declined in clone OP-367 only under drought stress II and *** OP-367 had more RWC and sd than DN-34 and *** the 30%FC induced an increase in the root-to-shoot ratio(rs)and water use efficiency(WUE)in all the three ***-367 was the most efficient clone in water absorption and use,for plants of the clone had the highest values of rs and *** data demonstrate that among the three clones,OP-367 was better able to maintain photosynthesis and growth and lower the damage caused by drought.

关键词： antioxidant enzyme drought tolerance growth hybrid poplar clone leaf gas exchange

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Eu ^(3+) Improving drought tolerance But Decreasing ODAP Level in Grass Pea (Lathyrus Sativus L.) Seedlings

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Journal of Rare Earths 2005年第S1期23卷 502-507页

作者：熊友才邢更妹郑峥王亚馥李志孝李凤民 Laboratory of Arid Agroecology Lanzhou University Lanzhou 730000 ChinaState Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau Institute of Conservation of Soil and Water CAS Yangling 712100 China Institute of High Energy Physics Chinese Academy of Sciences (CAS) Beijing 100039 China School of foreign language Shandong University Jinan 250100 China Laboratory of Arid Agroecology Lanzhou University Lanzhou 730000 China Laboratory of Arid Agroecology Lanzhou University Lanzhou 730000 China State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau Institute of Conservation of Soil and Water CAS Yangling 712100 China

drought tolerance and toxicity variation of grass pea (Lathyrus Sativus L.) were studied in the presence and absence of earth element Eu 3+ under the pot-culture condition. The addition of exogenous Eu 3+ increases the survival days (SD) and lowered the stomatal sensitivity of grass pea seedlings under the decreasing soil moisture from -0.2 MPa to -1 MPa, suggesting that Eu 3+ can improve the ability of grass pea seedlings to tolerate drought. But in this case, Eu 3+ is found to significantly inhibit the increase in contents of plant toxicity β-N-oxalyl-L-a, β-diaminopropionic acid (ODAP) level in leaves. Therefore, the results demonstrate that Eu 3+ application is a potential agronomic approach to improve drought tolerance while lowering the toxicity level in grass pea productivity.

关键词： grass pea β-N-oxalyl-L-a β-diaminopropionic acid (ODAP) europium ion (Eu 3+) survival days stomatal sensitivity drought tolerance rare earths

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Assessment of molecular markers and marker-assisted selection for drought tolerance in barley(Hordeum vulgare L.)

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Journal of Integrative Agriculture 2024年第1期23卷 20-38页

作者： Akmaral Baidyussen Gulmira Khassanova Maral Utebayev Satyvaldy Jatayev Rystay Kushanova Sholpan Khalbayeva Aigul Amangeldiyeva Raushan Yerzhebayeva KulpashBulatova Carly Schramm Peter Anderson Colin L.D.Jenkins Kathleen LSoole Yuri Shavrukov Faculty of Agronomy S.Seifullin Kazakh AgroTechnical Research UniversityAstana 010000Kazakhstan A.I.Barayev Research and Production Centre of Grain Farming Shortandy 021601Kazakhstan Kazakh Research Institute of Agriculture and Plant Growing AlmalybakAlmaty District 040909Kazakhstan College of Science and Engineering Biological SciencesFlinders UniversityAdelaideSA 5042Australia

This review updates the present status of the field of molecular markers and marker-assisted selection(MAS),using the example of drought tolerance in *** accuracy of selected quantitative trait loci(QTLs),candidate genes and suggested markers was assessed in the barley genome *** common strategies are described for molecular marker development,candidate gene identification and verification,and their possible applications in MAS to improve the grain yield and yield components in barley under drought *** strategies are based on the following five principles:(1)Molecular markers are designated as genomic‘tags’,and their‘prediction’is strongly dependent on their distance from a candidate gene on genetic or physical maps;(2)plants react differently under favourable and stressful conditions or depending on their stage of development;(3)each candidate gene must be verified by confirming its expression in the relevant conditions,e.g.,drought;(4)the molecular marker identified must be validated for MAS for tolerance to drought stress and improved grain yield;and(5)the small number of molecular markers realized for MAS in breeding,from among the many studies targeting candidate genes,can be explained by the complex nature of drought stress,and multiple stress-responsive genes in each barley genotype that are expressed differentially depending on many other factors.

关键词： barley candidate genes drought tolerance gene verification via expression grain yield marker-assisted selection(MAS) molecular markers quantitative trait loci(QTLs) strategy for MAS

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Evaluation of Inherited Resistance Genes of Bacterial Leaf Blight, Blast and drought tolerance in Improved Rice Lines

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Rice science 2021年第3期28卷 279-288页

作者： Ibrahim Silas AKOS Mohd Y.RAFII Mohd Razi ISMAIL Shairul Izan RAMLEE Noraziyah Abd Aziz SHAMSUDIN Asfaliza RAMLI Samuel Chibuike CHUKWU Senesie SWARAY Momodu JALLOH Laboratory of Climate-Smart Food Crop Production Institute of Tropical Agriculture and Food SecurityUniversiti Putra MalaysiaSerdang 43400SelangorMalaysia Department of Crop Science Faculty of AgricultureKaduna State University801 KafanchanKaduna 801139Nigeria Department of Crop Science Faculty of AgricultureUniversiti Putra MalaysiaSerdang 43400SelangorMalaysia School of Environmental and Natural Resource Sciences Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaBangi 43600SelangorMalaysia Rice Research Centre Malaysian Agricultural Research and Development InstituteSerdang 43400SelangorMalaysia

Improved rice lines were developed frome three parents with the resistance or tolerance to bacterial leaf blight,blast and drought stress,respectively,using single-,double-and three-way *** improved lines were assessed for agro-morphological and yield traits under non-drought stress(NS)and reproductive-stage drought stress(RS)*** mean comparison of traits measured between parent plants and progenies(improved lines)were similar,and there were significant and non-significant differences among the parents and improved lines(genotypes)under NS and ***,there was significant and non-significant differences in the interaction among both parent varieties and improved lines for NS and *** and 3D-model of principal component analysis did not generate categorical clusters according to crossing methods,and there were no exclusive crossing method inclined variations under the *** improved lines were high-yielding,disease resistant,and drought-tolerant compared with their *** the crossing methods were good for this crop improvement program without preference to any,despite the number of genes introgressed.

关键词： rice bacteria leaf blight blast drought tolerance resistance gene

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Autophagy receptor ZmNBR1 promotes the autophagic degradation of ZmBRI1a and enhances drought tolerance in maize

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Journal of Integrative Plant Biology 2024年第6期66卷 1068-1086页

作者： Yang Xiang Guangdong Li Qian Li Yingxue Niu Yitian Pan Yuan Cheng Xiangli Bian Chongyang Zhao Yuanhong Wang Aying Zhang College of Life Sciences Nanjing Agricultural UniversityNanjing210095 China State Key Laboratory of Crop Genetics&Germplasm Enhancement and Utilization Nanjing Agricultural UniversityNanjing210095 China Sanya Institute of Nanjing Agricultural University Nanjing Agricultural UniversitySanya572025 China

drought stress is a crucial environmental factor that limits plant growth,development,and *** of misfolded proteins can help alleviate the damage caused in plants experiencing ***,the mechanism of autophagy-mediated drought tolerance in plants remains largely ***,we cloned the gene for a maize(Zea mays)selective autophagy receptor,NEXT TO BRCA1GENE 1(ZmNBR1),and identified its role in the response to drought *** observed that drought stress increased the accumulation of *** sequencing and reverse transcriptionquantitative polymerase chain reaction showed that ZmNBR1 is markedly induced by drought ***1 overexpression enhanced drought tolerance,while its knockdown reduced drought tolerance in *** results established that ZmNBR1 mediates the increase in autophagosomes and autophagic activity under drought ***1 also affects the expression of genes related to autophagy under drought ***,we determined that BRASSINOSTEROID INSENSITIVE1A(ZmBRI1a),a brassinosteroid receptor of the BRI1-like family,interacts with *** analysis showed that ZmBRI1a negatively regulates drought tolerance in maize,and genetic analysis indicated that ZmNBR1 acts upstream of ZmBRI1a in regulating drought ***,ZmNBR1facilitates the autophagic degradation of ZmBRI1a under drought *** together,our results reveal that ZmNBR1 regulates the expression of autophagy-related genes,thereby increasing autophagic activity and promoting the autophagic degradation of ZmBRI1a under drought stress,thus enhancing drought tolerance in *** findings provide new insights into the autophagy degradation of brassinosteroid signaling components by the autophagy receptor NBR1 under drought stress.

关键词： autophagy receptor drought tolerance Zea mays ZmBRI1a ZmNBR1

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Interference of CsGPA1,theα-submit of G protein,reduces drought tolerance in cucumber seedlings

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Horticultural Plant Journal 2021年第3期7卷 209-220页

作者： Yumei Liu Qinghua Du Longqiang Bai Mintao Sun Yansu Li Chaoxing He Jun Wang Xianchang Yu Yan Yan The Institute of Vegetables and Flowers Chinese Academy of Agricultural SciencesBeijing 100081China College of Agricultural and Biological Engineering Heze UniversityHezeShandong 274000China Tianjin Agricultural University Tianjin 300384China School of Horticulture Shanxi Agricultural UniversityTaiguShanxi 030801China

The G proteinα-subunit,GPA1,is an integral component of several signaling pathways in plants,including response to abiotic ***,the molecular mechanism behind these processes remains largely unknown in the cucumber plant(Cucumis sativus L.).In order to further understand the role of CsGPA1 in cucumber under drought stress,changes in plant growth,physiological parameters,and gene expression of CsAQPs were all measured under water stress induced by polyethylene glycol(PEG)using wild type(WT)and CsGPA1-interference(RNAi)cucumber *** results demonstrated that the RNAi plants had lower drought tolerance,displaying seriously withered leaves,lower relative growth rate,lower root-shoot ratio,and lower root activity under drought stress compared to WT *** studies indicated that the suppression of CsGPA1 weakened drought stress tolerance due to higherwater loss rate in the leaves,higher levels of hydrogen peroxide(H2O2),increased malondialdehyde(MDA)content,lower free proline content,lower soluble sugar content,lower soluble protein content,and decreased antioxidant enzyme ***-PCR analysis demonstrated that the interference of CsGPA1 up-regulated the expression of most AQP genes(except for CsPIP2;3 in leaves)and down-regulated the expression of CsPIP1;2,CsPIP1;4,CsPIP2;1,and CsPIP2;4 in roots under drought stress when compared to WT *** results demonstrated that CsGPA1 could function as a positive regulator in drought stress response by decreasing the accumulation of reactive oxygen species(ROS),improving permeable potentials,and reducing water loss in cucumber plants.

关键词： Cucumis sativus CsGPA1 drought tolerance ROS scavenging Water content

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Two gene clusters and their positive regulator SlMYB13 that have undergone domestication-associated negative selection control phenolamide accumulation and drought tolerance in tomato

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Molecular Plant 2024年第4期17卷 579-597页

作者： Peng Cao Jun Yang Linghao Xia Zhonghui Zhang Zeyong Wu Yingchen Hao Penghui Liu Chao Wang Chun Li Jie Yang Jun Lai Xianggui Li Meng Deng Shouchuang Wang School of Breeding and Multiplication(Sanya Institute of Breeding and Multiplication) Hainan UniversitySanya 572025China College of Tropical Agriculture and Forestry Hainan UniversityHaikou 572208China Collaborative Innovation Center of Nanfan and High-Efficiency Tropical Agriculture Hainan UniversityHaikou 572208China

Among plant metabolites,phenolamides,which are conjugates of hydroxycinnamic acid derivatives and polyamines,play important roles in plant adaptation to abiotic and biotic ***,the molecular mechanisms underlying phenolamide metabolism and regulation as well as the effects of domestication and breeding on phenolamide diversity in tomato remain largely *** this study,we performed a metabolite-based genome-wide association study and identified two biosynthetic gene clusters(BGC7 and BGC11)containing 12 genes involved in phenolamide metabolism,including four biosynthesis genes(two 4CL genes,one C3H gene,and one CPA gene),seven decoration genes(five AT genes and two UGT genes),and one transport protein gene(DTX29).Using gene co-expression network analysis we further discovered that SlMYB13 positively regulates the expression of two gene clusters,thereby promoting phenolamide *** and physiological analyses showed that BGC7,BGC11 and SlMYB13 enhance drought tolerance by enhancing scavenging of reactive oxygen species and increasing abscisic acid content in *** variation analysis suggested that BGC7,BGC11 and SlMYB13 were negatively selected during tomato domestication and improvement,leading to reduced phenolamide content and drought tolerance of cultivated ***,our study discovers a key mechanism of phenolamide biosynthesis and regulation in tomato and reveals that crop domestication and improvement shapes metabolic diversity to affect plant environmental adaptation.

关键词： tomato phenolamides gene cluster drought tolerance natural variation evolution

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Predictive models of drought tolerance indices based on physiological,morphological and biochemical markers for the selection of cotton(Gossypium hirsutum L.)varieties

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Journal of Integrative Agriculture 2022年第5期21卷 1310-1320页

作者： Yeison M QUEVEDO Liz P MORENO Eduardo BARRAGAN Colombian Corporation for Agricultural Research AGROSAVIA日Espinal 733529Colombia Faculty of Agricultural Sciences National University of ColombiaBogota D.C 111321Colombia

The use of tolerant crop varieties is a strategy that mitigates the water deficit effect in a sustainable *** generation of these varieties is more efficient when variables associated with this tolerance have been identified,since they can facilitate the breeding *** study aimed to establish the relationships between water deficit tolerance of four cotton varieties(Nevada-123,Oasis-129,Guatapuri,and Festivalle)and morphological variables(monopodial branches,boll weight,root/shoot ratio,and leaf and root dry matter),physiological variables(relative water content,net photosynthesis,stomatal conductance,electron transport rate,photochemical quenching,photochemical efficiency of PSII,chlorophyll a/b ratio(Chl a/b),C^(12)/C^(13)isotope ratio,and electrolyte leakage),and biochemical variables(contents of sugars,proline,carotenoids,and malondialdehyde).Furthermore,calibrated predictive models of the drought tolerance indices were developed based on the key variables *** this purpose,a pot experiment was established where plants were subjected to a moderate or severe water deficit during the blooming stage for 12 *** stress tolerance index(STI)and mean productivity(MP)were *** the evaluated variables,the differences between well-watered and water deficit plants(Δ)were calculated and ANOVA,partial least squares,Pearson’s correlation,and multiple linear regression analyzes were performed.A model was generated that explained 95% of the STI and was composed of Δmalondialdehyde,Δproline,and Δboll *** MP,the model was comprised of Δstomatal conductance,Δroot/shoot ratio,and ΔChl a/b,and explained 89% of the *** analysis of the assessed variables allowed the identification of key variables and the development of calibrated predictive models that can be used in screening to obtain cotton varieties with different levels of water deficit tolerance.

关键词： drought tolerance tolerance index proline chlorophyll stomatal conductance malondialdehyde yield multivariate analysis

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Leaf Morphology Genes SRL1 and RENL1 Co-Regulate Cellulose Synthesis and Affect Rice drought tolerance

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Rice science 2024年第1期31卷 103-117,I0020-I0022页

作者： LIU Dan ZHAO Huibo WANG Zi’an XU Jing LIU Yiting WANG Jiajia CHEN Minmin LIU Xiong ZHANG Zhihai CEN Jiangsu ZHU Li HU Jiang REN Deyong GAO Zhenyu DONG Guojun ZHANG Qiang SHEN Lan LI Qing QIAN Qian HU Songping ZHANG Guangheng State Key Laboratory of Rice Biology and Breeding China National Rice Research InstituteHangzhou 310006China Research Center of Plant Functional Genes and Tissue Culture Technology College of Bioscience and BioengineeringJiangxi Agricultural UniversityNanchang 330045China Qian Qian Academician Workstation National Nanfan Research Institute(Sanya)Chinese Academy of Agricultural SciencesSanya 572024China

The morphological development of rice(Oryza sativa L.)leaves is closely related to plant architecture,physiological activities,and ***,it is unclear whether there is a co-regulatory relationship between the morphological development of leaves and adaptation to drought *** this study,a drought-sensitive,roll-enhanced,and narrow-leaf mutant(renl1)was induced from a semi-rolled leaf mutant(srl1)by ethyl methane sulfonate(EMS),which was obtained from Nipponbare(NPB)through ***-based cloning and functional validation showed that RENL1 encodes a cellulose synthase,allelic to NRL1/*** RENL1 mutation resulted in reduced vascular bundles,vesicular cells,cellulose,and hemicellulose contents in cell walls,diminishing the water-holding capacity of *** addition,the root system of the renl1 mutant was poorly developed and its ability to scavenge reactive oxygen species(ROS)was decreased,leading to an increase in ROS after drought ***,genetic results showed that RENL1 and SRL1 synergistically regulated cell wall *** results revealed a theoretical basis for further elucidating the molecular regulation mechanism of cellulose on rice drought tolerance,and provided a new genetic resource for enhancing the synergistic regulation network of plant type and stress resistance,thereby realizing simultaneous improvement of multiple traits in rice.

关键词： cellulose cell wall drought tolerance leaf morphology rice

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Cloning of the OAT gene and the correlation between its expression and drought tolerance in Phaseolus vulgaris L.

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Journal of Integrative Agriculture 2016年第5期15卷 973-982页

作者： CHEN Ji-bao CAO Yuan-nan ZHANG Zhao-yuan WANG Shu-min WU Jing WANG Lan-fen School of Life Science and Technology Nanyang Normal University Institute of Crop Sciences Chinese Academy of Agricultural Sciences

drought stress is a major abiotic stress of common bean（Phaseolus vulgaris L.） throughout the world. Increasing the proline accumulation contributes to enhance crop drought tolerance. A c DNA for δ-o rnithine aminotransferase（δ-OAT）, an enzyme involved in the biosynthesis of proline, was isolated from Phaseolus vulgaris（Pv OAT）. Pv OAT exhibits 87.4 and 39.8% similarity of the deduced amino acid sequences with δ-OAT from Glycine max and Vigna aconitifolia, respectively. The transcriptional analysis revealed that Pv OAT was strongly induced by drought stress. And the expression of Pv OAT was higher in leaves than that in the root and stem of common bean by drought stress. Similar increase of the proline accumulation was observed in leaves and roots of common bean by drought stress. Furthermore, the proline content, the Pv OAT expression and the Pv OAT enzyme activity in cul tivar F5575 was significantly（P〈0.01） higher than that in cultivar F4851 under drought-stress conditions. Interestingly, it had been observed that, in the later stage of drought stress, the proline steadily maintained at the maximum level maybe result from the Pv OAT enzyme activity increasing steadily. These r esults indicated that the expression of Pv OAT and the accumulation of proline induced by drought stress treatment were related to the degree of common bean drought tolerance. So our results support the view that δ-OAT is associated with proline synthesis under drought stress conditions.

关键词： common bean ornithine aminotransferase gene proline drought tolerance

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