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An alfalfa MYB-like transcriptional factor MsMYBH positively regulates alfalfa seedling drought resistance and undergoes MsWAV3-mediated degradation

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Journal of Integrative Plant Biology 2024年第4期66卷 683-699页

作者： Kun Shi Jia Liu Huan Liang Hongbin Dong Jinli Zhang Yuanhong Wei Le Zhou Shaopeng Wang Jiahao Zhu Mingshu Cao Chris S.Jones Dongmei Ma Zan Wang College of Grassland Science and Technology China Agricultural UniversityBeijing 100193China Institute of Animal Sciences Chinese Academy of Agricultural SciencesBeijing 100193China AgResearch Grasslands Research Centre Palmerston North 4442New Zealand International Livestock Research Institute Nairobi 00100Kenya School of Ecology and Environment Ningxia UniversityYinchuan 750021China

drought is a major threat to alfalfa(Medicago sativa L.)*** discovery of important alfalfa genes regulating drought response will facilitate breeding for drought-resistant alfalfa ***,we report a genome-wide association study of drought resistance in *** identified and functionally characterized an MYB-like transcription factor gene(MsMYBH),which increases the drought resistance in *** with the wild-types,the biomass and forage quality were enhanced in MsMYBH overexpressed *** RNA-seq,proteomics and chromatin immunoprecipitation analysis showed that MsMYBH can directly bind to the promoters of MsMCP1,MsMCP2,MsPRX1A and MsCARCAB to improve their *** outcomes of such interactions include better water balance,high photosynthetic efficiency and scavenge excess H_(2)O_(2)in response to ***,an E3 ubiquitin ligase(MsWAV3)was found to induce MsMYBH degradation under long-term drought,via the 26S proteasome ***,variable-number tandem repeats in MsMYBH promoter were characterized among a collection of germplasms,and the variation is associated with promoter ***,our findings shed light on the functions of MsMYBH and provide a pivotal gene that could be leveraged for breeding drought-resistant *** discovery also offers new insights into the mechanisms of drought resistance in alfalfa.

关键词： alfalfa drought resistance E3 ubiquitin ligase MsMYBH MsWAV3 MYB-like transcriptional factor

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Root-derived long-distance signals trigger ABA synthesis and enhance drought resistance in Arabidopsis

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Journal of Genetics and Genomics 2024年第7期51卷 749-761页

作者： Qian-Qian Liu Jin-Qiu Xia Jie Wu Yi Han Gui-Quan Zhang Ping-Xia Zhao Cheng-Bin Xiang Division of Life Sciences and Medicine Division of Molecular&Cell BiophysicsHefei National Science Center for Interdisciplinary Sciences at the MicroscaleUniversity of Science and Technology of ChinaThe Innovation Academy of Seed DesignChinese Academy of SciencesHefeiAnhui 230027China College of Life Sciences Anhui Agricultural UniversityHefeiAnhui 230036China College of Agronomy South China Agricultural UniversityGuangzhouGuangdong 510642China School of Biology and Basic Medical Sciences Soochow UniversitySuzhouJiangsu 215123China

Vascular plants have evolved intricate long-distance signaling mechanisms to cope with environmental stress,with reactive oxygen species(ROS)emerging as pivotal systemic signals in plant stress ***,the exact role of ROS as root-to-shoot signals in the drought response has not been *** this study,we reveal that compared with wild-type plants,ferric reductase defective 3(frd3)mutants exhibit enhanced drought resistance concomitant with elevated NINE-CIS-EPOXYCAROTENOID DIOXYGENASE 3(NCED3)transcript levels and abscisic acid(ABA)contents in leaves as well as increased hydrogen peroxide(H_(2)O_(2))levels in roots and *** experiments distinctly illustrate that drought resistance can be conferred by the frd3 rootstock regardless of the scion genotype,indicating that long-distance signals originating from frd3 roots promote an increase in ABA levels in ***,the drought resistance conferred by the frd3 mutant rootstock is weakened by the CAT2-overexpressing scion,suggesting that H_(2)O_(2)may be involved in long-distance ***,the results of comparative transcriptome and proteome analyses support the drought resistance phenotype of the frd3 *** together,our findings substantiate the notion that frd3 root-derived long-distance signals trigger ABA synthesis in leaves and enhance drought resistance,providing new evidence for root-to-shoot long-distance signaling in the drought response of plants.

关键词： frd3 drought resistance Root-to-shoot long-distance signals Reactive oxygen species(ROS) H_(2)O_(2) Iron ABA

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Physiological and Transcriptome Analysis Illuminates the Molecular Mechanisms of the drought resistance Improved by Alginate Oligosaccharides in Triticum aestivum L.

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Phyton-International Journal of Experimental Botany 2024年第2期93卷 185-212页

作者： Yunhong Zhang Yonghui Yang Jiawei Mao Institute of Plant Nutrition Agricultural Resource and Environmental ScienceHenan Academy of Agricultural SciencesZhengzhou450002China Henan Key Laboratory of Agricultural Eco-Environment Henan Academy of Agricultural SciencesZhengzhou450002China

Alginate oligosaccharides(AOS)enhance drought resistance in wheat(Triticum aestivum L.),but the definite mechanisms remain largely *** physiological and transcriptome responses of wheat seedlings treated with AOS were analyzed under drought stress simulated with polyethylene *** results showed that AOS promoted the growth of wheat seedlings and reduced oxidative damage by improving peroxidase and superoxide dismutase activities under drought stress.A total of 10,064 and 15,208 differentially expressed unigenes(DEGs)obtained from the AOS treatment and control samples at 24 and 72 h after dehydration,respectively,were mainly enriched in the biosynthesis of secondary metabolites(phenylpropanoid biosynthesis,flavonoid biosynthesis),carbohydrate metabolism(starch and sucrose metabolism,carbon fixation in photosynthetic organisms),lipid metabolism(fatty acid elongation,biosynthesis of unsaturated fatty acids,alpha-linolenic acid metabolism,cutin,suberine and wax biosynthesis),and signaling transduction *** up-regulated genes were related to,for example,chlorophyll a-b binding protein,amylosynthease,phosphotransferase,peroxidase,phenylalanine ammonia lyase,flavone synthase,glutathione *** molecules(including MAPK,plant hormones,H_(2)O_(2) and calcium)and transcription factors(mainly including NAC,MYB,MYB-related,WRKY,bZIP family members)were involved in the AOS-induced wheat drought *** results obtained in this study help underpin the mechanisms of wheat drought resistance improved by AOS,and provides a theoretical basis for the application of AOS as an environmentally sustainable biological method to improve drought resistance in agriculture.

关键词： Alginate oligosaccharides Triticum aestivum L. drought resistance transcriptomic physiological analysis

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Physiological Response Mechanism and drought resistance Evaluation of Passiflora edulis Sims under drought Stress

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Phyton-International Journal of Experimental Botany 2024年第6期93卷 1345-1363页

作者： Binyang Zhao Fengchan Wu Guojun Cai Peiyu Xi Yulin Guo Anding Li College of Forestry Guizhou UniversityGuiyang550025China Guizhou Institute of Biology Guizhou Academy of SciencesGuiyang550009China College of Resources and Environment Hunan Agricultural UniversityChangsha410128China

In order to explore the response mechanism of Passiﬂora edulis Sims to drought stress,the changes in morpho-logical and physiological traits of Passiﬂora edulis Sims under different drought conditions were studied.A total of 7 germplasm resources of Passiﬂora edulis Sims were selected and tested under drought stress by the pot culture method under 4 treatment levels:75%–80%(Control,CK)of maximumﬁeld water capacity,55%–60%(Light drought,LD)of maximumﬁeld water capacity,i.e.,mild drought,40%–45%(Moderate drought,MD)of max-imumﬁeld water capacity,i.e.,moderate drought and 30%–35%(Severe drought,SD)of maximumﬁeld water capacity,i.e.,severe *** the 40th day of drought treatment,13 indices,including seedling growth mor-phology,physiology,and biochemistry,were *** results showed that under drought stress,the height and ground diameter of *** Sims gradually decreased with increasing drought stress,and there were signiﬁ-cant differences in seedling height and ground diameter among the *** stress signiﬁcantly inhib-ited the growth of seven *** Sims *** contents of soluble sugar(SS),soluble protein(SP),proline(Pro),and other substances in *** Sims basically increased with increasing drought *** the aggrava-tion of drought stress,the malondialdehyde(MDA)content of *** Sims tended to increase to different degrees,the superoxide dismutase(SOD)activity and peroxidase(POD)activity both tended to increase atﬁrst and then decrease,and the change in catalase(CAT)activity mostly showed a gradual increasing *** con-tents of endogenous hormones in *** Sims signiﬁcantly differed under different degrees of drought *** the aggravation of drought stress,the abscisic acid(ABA)content of *** Sims tended to increase,whereas the contents of gibberellin(GA),indoleacetic acid(IAA),and zeatin nucleoside(ZR)exhibited a down-ward trend.A comprehensive evaluation of the drought resistance of seven *** Sim

关键词： drought resistance water stress phytohormone morphological trait physiological traits

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Genetic dissection of drought resistance for trait improvement in crops

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The Crop Journal 2023年第4期11卷 975-985页

作者： Shengxue Liu Hongwei Wang Feng Qin College of Biological Sciences China Agricultural UniversityBeijing 100193China Agricultural College Yangtze UniversityJingzhou 434025HubeiChina

Reliance on agriculture for food security is a constant in all modern *** climate change and population growth have put immense pressure on sustainable agriculture,exacerbating the effects of environmental *** is one of the most pressing abiotic stresses that farmers face,presenting an annual threat to crop growth and *** have evolved extensive morphological,physiological,and molecular mechanisms to combat drought *** resistance is a polygenic trait,controlled by a complex genetic network and an array of genes working together to ensure plant *** studies have aimed at dissecting the genetic mechanisms underlying drought *** studies using linkage and association mapping have made progress in identifying genetic variations that affect drought-resistance *** loci may potentially be engineered by genetic transformation and genome editing aimed at developing new,stress-resistant crop *** we summarize recent progress in elucidating the genetic basis of crop drought ***-breeding technologies such as marker-assisted selection,genome selection,gene transformation,and genome editing are currently employed to develop drought-resistant germplasm in a variety of *** advances in basic research and crop biotechnology covered in this review will facilitate delivery of drought-resistant crops with unprecedented efficiency.

关键词： drought resistance QTL GWAS Molecular breeding

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Increase in root density induced by coronatine improves maize drought resistance in North China

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The Crop Journal 2023年第1期11卷 278-290页

作者： Yuling Guo Guanmin Huang Qing Guo Chuanxi Peng Yingru Liu Mingcai Zhang Zhaohu Li Yuyi Zhou Liusheng Duan State Key Laboratory of Plant Physiology and Biochemistry College of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193China

drought stress caused by insufficient irrigation or precipitation impairs agricultural production *** this study,a two-year field experiment was conducted to investigate the effect of coronatine(COR),a functional analog of jasmonic acid(JA),on maize drought *** experiment included two water treatments(rainfed and irrigation),four COR concentrations(mock,0μmol L^(-1);A1,0.1μmol L^(-1);A2,1μmol L^(-1);A3,10μmol L^(-1))and two maize genotypes(Fumin 985(FM985),a drought-resistant cultivar and Xianyu 335(XY335),a drought-sensitive cultivar).Spraying 1μmol L^(-1)COR at seedling stage increased surface root density and size,including root dry matter by 12.6%,projected root area by 19.0%,average root density by 51.9%,and thus root bleeding sap by 28.2%under drought *** application also increased leaf area and SPAD values,a result attributed to improvement of the root system and increases in abscisic acid(ABA),JA,and salicylic acid(SA)*** improvement of leaves and roots laid the foundation for increasing plant height and dry matter *** application reduced anthesis and silking interval,increasing kernel number per *** treatment at 1μmol L^(-1)increased the yield of XY335 and FM985 by 7.9%and 11.0%,*** and path analysis showed that grain yields were correlated with root dry weight and projected root area,increasing maize drought resistance mainly via leaf area index and dry matter ***,COR increased maize drought resistance mainly by increasing root dry weight and root area,with 1μmol L-^(-1)COR as an optimal concentration.

关键词： Maize drought resistance Coronatine Root development Grain yields

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Natural variations of ZmSRO1d modulate the trade-off between drought resistance and yield by affecting ZmRBOHC-mediated stomatal ROS production in maize

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Molecular Plant 2022年第10期15卷 1558-1574页

作者： Huajian Gao Junjun Cui Shengxue Liu Shuhui Wang Yongyan Lian Yunting Bai Tengfei Zhu Haohao Wu Yijie Wang Shiping Yang Xuefeng Li Junhong Zhuang Limei Chen Zhizhong Gong Feng Qin Key Laboratory of Plant Molecular Physiology Institute of BotanyChinese Academy of SciencesBeijing 100093China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China Center for Crop Functional Genomics and Molecular Breeding China Agricultural UniversityBejing 100193China School of Life Science Institute of Life Science and Green DevelopmentHebei UniversityBaodingHebei071002China

While crop yields have historically increased,drought resistance has become a major concern in the context of global climate *** trade-off between crop yield and drought resistance is a common phenomenon;however,the underlying molecular modulators remain *** genome-wide association study,we revealed that three non-synonymous variants in a drought-resistant allele of ZmSRO1d-R resulted in plasma membrane localization and enhanced mono-ADP-ribosyltransferase activity of ZmSRO1d toward ZmRBOHC,which increased reactive oxygen species(ROS)levels in guard cells and promoted stomatal ***1d-R enhanced plant drought resilience and protected grain yields under drought conditions,but it led to yield drag under favorable *** contrast,loss-of-function mutants of ZmRBOHC showed remarkably increased yields under well-watered conditions,whereas they showed compromised drought ***,by analyzing 189 teosinte accessions,we found that the ZmSRO1d-R allele was present in teosinte but was selected against during maize domestication and modern ***,our work suggests that the allele frequency reduction of ZmSRO1d-R in breeding programs may have compromised maize drought resistance while increased ***,introduction of the ZmSRO1d-R allele into modern maize cultivars would contribute to food security under drought stress caused by global climate change.

关键词： ZmSRO1d stomatal ROS drought resistance yield maize

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Cloning and drought resistance Analysis of Soybean GmHsps_p23-like Gene

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Phyton-International Journal of Experimental Botany 2022年第6期91卷 1183-1198页

作者： Yuzhe Zhang Guanglong Li Shaowang Hu Jinfeng Liu Yushi Jiang Siyan Liu Shuyan Guan Jing Qu Dan Yao Andi Shi Yixuan Liu College of Life Sciences Jilin Agricultural UniversityChangchun130118China College of Agronomy Jilin Agricultural UniversityChangchun130118China

Soybean(Glycine max(L.)Merr.)is an important cultivated crop,which requires much water during its growth,and drought seriously affects soybean *** have shown that the expression of small heat shock proteins can enhance drought resistance,cold resistance and salt resistance of *** this experiment,soybean GmHsps_p23-like gene was successfully cloned by RT-PCR,the protein encoded by the GmHsps_p23-like gene was subjected to bioinformatics analysis,and the pCAMBIA3301-GmHsps_p23-like overexpression vector and pCBSG015-GmHsps_p23-like gene editing vector were ***-mediated method was used to transform soybeans to obtain positive ***-PCR detection,rehydration experiment and drought resistance physiological and biochemical index detection were performed on the T2 generation positive transgenic soybean plants identified by PCR and Southern *** results showed that the overexpression vector plant GmHsps_p23-like gene expression *** rehydration,the transgenic overexpression plants returned to normal growth,and the damage to the plants was *** drought stress,the SOD and POD activities and the PRO content of the transgenic overexpression plants increased,while the MDA content *** reverse was true for soybean plants with genetically modified editing *** drought resistance of the overexpressed soybeans under drought stress was higher than that of the control group,and had a stronger drought *** showed that the expression of soybean GmHsps_p23-like gene can improve the drought resistance of *** cloning and functional verification of soybean GmHsps_p23-like gene had not been reported *** is the first time that PCR technology has been used to amplify the soybean GmHsps_p23-like gene and construct an expression vector for this *** research has laid the foundation for transgenic technology to improve plant drought resistance and cultivate new drought-resistant tran

关键词： Soybean small heat shock protein CRISPR/Cas9 drought resistance

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CIMBL55:a repository for maize drought resistance alleles

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Stress Biology 2023年第1期3卷 150-153页

作者： Tian Tian Feng Qin State Key Laboratory of Plant Environmental Resilience College of Biological SciencesChina Agricultural UniversityBeijing 100193China

droughts threaten crop yields *** to other major staple cereal crops,maize(Zea mays)is especially sensitive to drought,which can cause dramatic fluctuations in its yield *** maize populations contain many superior alleles that can enhance drought resistance through complex regulatory *** recently de novo assembled the genome of a prominent drought-resistant maize germplasm,CIMBL55,and systematically dissected the genetic basis for its drought resistance on the genome,transcriptome,and epigenome *** analyses revealed 65 favorable drought resistance alleles in ***,we genetically verified the functions of the drought resistance genes ZmABF4,ZmNAC075,and ZmRtn16 and unraveled the function of ZmRtn16 on a molecular level.

关键词： Maize drought resistance Genome assembly Genetic variants

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Genetic Analysis on Characteristics to Measure drought resistance Using Dongxiang Wild Rice(Oryza rufupogon Griff.) and Its Derived Backcross Inbred Lines Population at Seedling Stage

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Agricultural Sciences in China 2011年第11期10卷 1653-1664页

作者： HU Biao-lin FU Xue-qin ZHANG Tao WAN Yong LI Xia HUANG Ytm-hong DAI Liang-fang LUO Xiang-dong XIE Jian-kun Rice Research Institute Jiangxi Academy of Agricultural Sciences Nanchang 330200 P.R.China College of Life Sciences Jiangxi Normal University Nanchang 330022 P.R. China

drought stress is one of the major constraints to rice （Oryza sativa L.） production and yield stability especially in rainfed ecosystems and is getting worse as the climate changes worldwide. Dongxiang wild rice （DXWR） Oryza rufipogon Griff., contains drought resistant gene. Improving drought resistance of cultivars is crucial to increase and stabilize rice grain yield via transferring resistant gene from species related to rice. In this paper, four upland rice, sixty backcross inbred lines （BILs） derived from BC1F5 of R974//DXWR/R974, and their parents were employed to evaluate drought-resistance at seedling stage in the greenhouse. Nine traits were recorded for assessment of drought resistance, including maximum root length （MRL）, number of roots （NR）, shoot length （SL）, dry root weight （DRW）, fresh root weight （FRW）, root relative water content （RRWC）, leaf relative water content （LRWC）, level for rolling leaf （LRL）, and seedling survivability under repeat drought （SSRD）. Using more than 88% of accumulative contribution resulted from the principal component analysis （PCA）, the nine traits were classified into five independent principal components and the line 1949 showed the highest resistance. Analysis on the stepwise regression equation and correlation demonstrated that MRL, RN, FRW, and RRWC significantly influenced the drought resistance, thus could be used as comprehensive index for drought resistance at the seedling stage. Using the major gene plus polygene mixed inheritance model of quantitative traits, the inheritance of drought-resistance of BIL population at seedling stage was mostly controlled by two independent genes plus polygene. As a result, the DXWR could be precious resources for genetic improvement of drought resistance in cultivated rice.

关键词： Dongxiang wild rice (DXWR) drought resistance principal component analysis (PCA) drought comprehensiveindex seedling stage

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