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Arabidopsis immune-associated nucleotide-binding genes repress heat tolerance at the reproductive stage by inhibiting the unfolded protein response and promoting cell death

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Molecular Plant 2021年第2期14卷 267-284页

作者： Shan Lu Tianquan Zhu Zhixue Wang Lilin Luo Shuai Wang Minghui Lu Yongmei Cui Baohong Zou Jian Hua The State Key Laboratory of Crop Genetics and Germplasm Enhancement Nanjing Agricultural UniversityNanjing 210095China Plant Biology Section School of Integrated Plant ScienceCornell UniversityIthacaNY 14853USA College of Horticulture Northwest A&F UniversityXianyangShaanxi 712100China

Plants are vulnerable to heat stress,especially during reproductive *** heat shock response(HSR)in the cytosol and nucleus,as well as the unfolded protein response(UPR)in the endoplasmic reticulum(ER),are two mechanisms that enable plants to survive heat *** heat or ER stresses lead to cell death when the UPR cannot repair stress damage,but the means by which cell survival or death is determined remains *** this study,we used a genome-wide association study(GWAS)to identify that a cluster of five Immune-associated nucleotide-binding protein(IAN)genes(IAN2 to IAN6)is responsible for variation in heat tolerance at the reproductive stage in Arabidopsis *** IAN genes have both unique and overlapping functions in the negative regulation of heat tolerance,and their loss of function singly or in combination confers increased heat tolerance,measured by a lower number of barren siliques and a higher seedling survival rate under *** loss of rice IAN1 gene function also leads to enhanced heat tolerance,suggesting a conserved function of plant *** analysis revealed enhanced expression of HSR and UPR genes,as well as reduced cell death,under heat and ER stress in the mutant of IAN6,a major effect member in ***,the IAN proteins were found to promote cell death induced by heat stress,ER stress,and cell death-inducing ***,the Arabidopsis IAN genes repress heat tolerance,probably through the HSR and UPR and by enhancing the cell death *** IAN2 to IAN6 proteins are partially localized to the ER,suggesting a direct role in the UPR and UPR-mediated cell *** addition,a natural IAN6 variant from more heat-tolerant Arabidopsis accessions confers greater heat tolerance and induces less cell death compared with the natural variant from less heat-tolerant *** heat-tolerant IAN6 variant is associated with a higher maximum temperature of the warmest month at its collection site

关键词： plant heat tolerance reproductive stage IAN cell death UPR HSR

Wheat genotypes tolerant to heat at seedling stage tend to be also tolerant at adult stage:The possibility of early selection for heat tolerance breeding

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The Crop Journal 2022年第4期10卷 1006-1013页

作者： Lu Lu Hui Liu Yu Wu Guijun Yan UWA School of Agriculture and Environment The University of Western AustraliaPerthWA 6009Australia The UWA Institute of Agriculture The University of Western AustraliaPerthWA 6009Australia Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041SichuanChina

Wheat production is seriously influenced by extreme hot weather,which has attracted increasing *** is important to compare wheat responses to heat at seedling and reproductive stages,to explore the potential relationship between the performances at different growing stages and the possibility of early selection to accelerate heat tolerance *** this study,forty wheat genotypes were screened under heat stress at both seedling and adult *** was found that root lengths at seedling stage were severely reduced by heat stress with significant variations among wheat ***-tolerant genotypes at seedling stage showed less root length decrease than susceptible *** genotypes tolerant at seedling stage showed higher yield at adult stage after heat *** performances of wheat genotypes screened under heat stress at seedling and adult stages were ranked by seedling damage index and adult damage index.A significant positive relationship was found between heat tolerance at seedling stage and at adult stage(r=0.6930),suggesting a similar tolerant/susceptible mechanism at different plant growth stages and the possibility of early selection at seedling stage for breeding heat *** tolerant and susceptible genotypes with consistent performances at seedling and adult stages were genetically compared and associated SNP markers and linked candidate genes were identified.

关键词： heat tolerance Seedling stage Adult stage Linear regression Genetic mechanism

A TT1–SCE1 module integrates ubiquitination and SUMOylation to regulate heat tolerance in rice

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Molecular Plant 2024年第12期17卷 1899-1918页

作者： Hong-Xiao Yu Ying-Jie Cao Yi-Bing Yang Jun-Xiang Shan Wang-Wei Ye Nai-Qian Dong Yi Kan Huai-Yu Zhao Zi-Qi Lu Shuang-Qin Guo Jie-Jie Lei Ben Liao Hong-Xuan Lin 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 University of the Chinese Academy of Sciences Beijing 100049China Joint Center for Single Cell Biology School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China School of Life Science and Technology ShanghaiTech UniversityShanghai 201210China Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou 510642China These authors contributed equally to this article

heat stress poses a significant threat to grain *** anα2 subunit of the 26S proteasome,TT1 has been shown to act as a critical regulator of rice heat ***,the heat tolerance mechanisms mediated by TT1 remain *** this study,we unveiled that small ubiquitin-like modifier(SUMO)-conjugating enzyme 1(SCE1),which interacts with TT1 and acts as a downstream component of TT1,is engaged in TT1-mediated 26S proteasome *** showed that SCE1 functions as a negative regulator of heat tolerance in rice,which is associated with its ubiquitination ***,we observed that small heat-shock proteins(sHSPs)such as Hsp24.1 and Hsp40 can undergo SUMOylation mediated by SCE1,leading to increased accumulation of sHSPs in the absence of *** protein levels of SCE1 significantly enhanced grain yield under high-temperature stress by improving seed-setting rate and rice grain filling *** together,these results uncover the critical role of SCE1 in the TT1-mediated heat tolerance pathway by regulating the abundance of sHSPs and SUMOylation,and ultimately modulating rice heat *** findings underscore the great potential of the TT1–SCE1 module in improving the heat tolerance of crops.

关键词： rice heat tolerance ubiquitination SUMOylation heat-shock protein

Genetic Analysis of Cold tolerance at Seedling Stage and heat tolerance at Anthesis in Rice (Oryza sativa L.)

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Journal of Integrative Agriculture 2012年第3期11卷 359-367页

作者： CHENG Li-rui WANG Jun-min Veronica Uzokwe MENG Li-jun WANG Yun SUN Yong ZHU Linghua XU Jian-long LI Zhi-kang National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Zhejiang Academy of Agricultural Sciences Hangzhou 310021P.R.China International Rice Research Institute DAPO Box 7777Metro ManilaPhilippines

A set of 240 introgression lines derived from the advanced backcross population of a cross between a japonica cultivar,Xiushui 09,and an indica breeding line,IR2061,was developed to dissect QTLs affecting cold tolerance （CT） at seedling stage and heat tolerance （HT） at *** rate of seedlings （SRS） and spikelet fertility （SF）,the index traits of CT and HT,showed significant differences between the two parents under stresses.A total of four QTLs （qSRS1,qSRS7,qSRS11a and qSRS11b） for CT were identified on chromosomes 1,7,11,and the Xiushui 09 alleles increased SRS at all loci except *** QTLs for SF were identified on chromosomes 4,5,6,and *** QTLs could be classified into two major types based on their behaviors under normal and stress *** first was QTL expressed only under normal condition;and the second QTL was apparently stress induced and only expressed under *** them,two QTLs （qSF4 and qSF6） which reduced the trait difference between heat stress and normal conditions must have contributed to HT because of their obvious contribution to trait stability,and the IR2061 allele at the qSF6 and the Xiushui 09 allele at the qSF4 improved HT,*** similar QTL was found between CT at seedling stage and HT at ***,it is possible to breed a new variety with CT and HT by pyramiding the favorable CT-and HT-improved alleles at above loci from Xiushui 09 and IR2061,respectively,through marker-assisted selection （MAS）.

关键词： cold tolerance heat tolerance advanced backcross population QTL mapping rice

Bulked Segregant Analysis to Detect QTL Related to heat tolerance in Rice(Oryza sativa L.) Using SSR Markers

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Agricultural Sciences in China 2009年第4期8卷 482-487页

作者： ZHANG Gui-lian CHEN Li-yun XIAO Guo-ying XIAO Ying-hui CHEN Xin-bo ZHANG Shun-tang Department of Agronomy Hunan Agricultural University Changsha 410128 P.R.China Institute of Subtropical Agriculture Chinese Academy of Sciences Changsha 410125 P.R.China Laboratory of Gene Engineering Hunan Agricultural University Changsha 410128 P.R. China

The study was undertaken to assess the genetic effect of quantitative trait loci （QTLs） conferring heat tolerance at flowering stage in rice. A population consisting of 279 F2 individuals from the cross between 996, a heat tolerant cultivar and 4628, a heat-sensitive cultivar, was analyzed for their segregation pattern of the difference of seed set rate under optimal temperature condition and high temperature condition. The difference of seed set rate under optimal temperature condition and high temperature condition showed normal distribution, indicating the polygenic control over the trait. To identify main effect of QTL for heat tolerance, the parents were surveyed with 200 primer pairs of simple sequence repeats （SSR）. The parental survey revealed 30% polymorphism between parents. In order to detect the main QTL association with heat tolerance, a strategy of combining the DNA pooling from selected segregants and genotyping was adopted. The association of putative markers identified based on DNA pooling from selected segregants was established by single marker analysis （SMA）. The results of SMA revealed that SSR markers, RM3735 on chromosome 4 and RM3586 on chromosome 3 showed significant association with heat tolerance respectively, accounted for 17 and 3% of the total variation respectively. The heat tolerance during flowering stage in rice was controlled by multiple gene. The SSR markers, RM3735 on chromosome 4 and RM3586 on chromosome 3 showed significant association with heat tolerance respectively, accounted for 17 and 3% of the total variation respectively. The two genetic loci, especially for RM3735 on chromosome 4, can be used in marker-assistant-selected method in heat tolerance breeding in rice.

关键词： bulked segregant analysis heat tolerance QTL rice (Oryza sativa L.) SSR markers

Identification for heat tolerance in Backcross Recombinant Lines and Screening of Backcross Introgression Lines with heat tolerance at Milky Stage in Rice

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Rice science 2011年第4期18卷 279-286页

作者： Jiang-lin LIAO Hong-yu ZHANG Xue-lian SHAO Ping-an ZHONG Ying-jin HUANG Key Laboratory of Crop Physiological Ecology and Genetic Breeding Ministry of Education Jiangxi Agricultural University Nanchang 330045 China

The present study aimed at breeding new rice germplasms with similar genome but significantly differed in heat tolerance during the grain filling stage.A total of 791 BC1F8 backcross recombinant lines,derived from the cross of Xieqingzao B /N22 //Xieqingzao B,were used as *** rice line was separated evenly into two groups,and the heat tolerance of all rice lines were evaluated at natural high temperature in *** rice lines with heat tolerant index higher than 90% or lower than 40% were selected to compare the phenotypic characters and further identify heat tolerance at the early milky stage in a *** lines with similar phenotypic characters but significantly differed in heat tolerance at the milky stage were analyzed by 887 simple sequence repeat markers that were evenly distributed on the 12 rice *** the result,12(6 pairs) rice lines with similar phenotypic characters but significantly differed in heat tolerance at the milky stage were *** marker analysis indicated that the genomic polymorphism between 703T and 704S was the smallest in the 6 pairs of rice lines,with only 16 polymorphic sites,including 22 different *** application of these two backcross introgression rice lines for future study on the mechanisms of heat tolerance in rice at the milky stage will be theoretically beneficial in reducing the interference caused by genetic differences from experimental materials.

关键词： rice heat tolerance milky stage backcross recombinant line backcross introgression line

Germplasm Innovation of heat tolerance in Rice for Irrigated Lowland Conditions in the Philippines

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Rice science 2014年第3期21卷 162-169页

作者： Norvie L.MANIGBAS Leslie Angela F.LAMBIO Luvina B.MADRID Corazon C.CARDENAS Plant Breeding and Biotechnology Division DA-Philippine Rice Research InstituteScience City of MunozNueva Ecija 3119the Philippines Crop Science Cluster Department of AgronomyU.P.Los BanosCollegeLaguna 4031the Philippines Department of Agriculture-Southern Cagayan Research Center IguigCagayan3504the Philippines

heat-tolerant varieties, such as N22 and Dular, which were used in this study, usually have low yield potential and undesirable plant characteristics but combining them with high yielding and improved rice varieties, new heat-tolerant rice genotypes with high yield potential can be achieved. In this study, phenotyping and selecting desirable materials from various crosses were performed under high temperature conditions during the reproductive stage. Screening was performed in the field and glasshouse to select individuals with heat tolerance and high yield potential. Several advanced breeding lines from Gayabyeo/N22 cross produced desirable individuals with heat tolerance, resistance to pests and diseases, and high yield potential. The genetic variation in percent sterility among the selected backcross populations grown in high temperature environments showed that large number of plants can be identified and selected with lower percent sterility.

关键词： heat tolerance high temperature irrigated lowland rice

Identification of heat tolerance Linked Molecular Markers of Chinese Cabbage(Brassica campestris ***)

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Agricultural Sciences in China 2002年第7期1卷 786-791页

作者： ZHENG Xiao-ying, WANG Yong-jian, SONG Shun-hua, LI Li and YU Shuan-cang(Beijing Vegetable Research Center, Beijing 100089 , P.R. China) Beijing Vegetable Research Center Beijing 100089 P. R . China

Genetically stable population of recombination inbred line (RIL) was derived from a cross between a heat tolerant line 177 and a heat sensitive line 276 of Chinese cabbage (Brassica campestris L. ssp. pekinensis) by single seed descent. The RILs were analyzed using isozyme, RAPD and AFLP techniques in order to find molecular markers that are linked to heat tolerance quantitative trait loci (QTL). The results of variance analysis of single factor indicated that there were 9 molecular markers closely linked with heat tolerance QTL, including 5 AFLP markers, 3 RAPD markers and 1 PGM isozyme marker. Total genetic contribution of these makers to heat tolerance was 46.7%. Five of the nine markers distributed in one linkage group, the remaining 4 markers were located in separate groups. Thus the 9 heat tolerance linked markers distributed in 5 independent locations in the genome of Chinese cabbage.

关键词： Chinese cabbage heat tolerance AFLP RAPD Isozyme molecular marker

Physiological Response to High Temperature and Evaluation of heat tolerance of Different Grape Cultivars

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Agricultural Biotechnology 2022年第1期11卷 47-54,85页

作者： Jiuyun WU Guixiang XU Weijia LIAN Ya CHEN Haifeng LI Yongxiang LIU Jianfu JIANG Jinghui WEN Turpan Research institute of Agricultural Sciences Xinjiang Academy of Agricultural SciencesTurpan 838000China College of Agronomy Shihezi UniversityShihezi 832000China Zhengzhou Fruit Research Institute Chinese Academy of Agricultural SciencesZhengzhou 450009China Institute of Pomology Jilin Academy of Agricultural ScienceGongzhuling 136100China

[Objectives]This study was conducted to investigate the differences in the physiological responses of different grape cultivars to high temperature.[Methods]The 19 tested cultivars were selected from the grape germplasm resources pool of Turpan Research Institute of Xinjiang Academy of Agricultural *** physiological indexes including gas exchange parameters,chlorophyll content,antioxidant enzyme activity and proline content were determined in grape leaves under field conditions during the middle period of local natural high temperature period(July,daily maximum air temperature>35℃).The heat tolerance of different cultivars was evaluated by fuzzy membership function analysis and optimum partitioning clustering of ordered samples.[Results](1)Under natural high temperature conditions in Turpan,the 19 tested grape cultivars responded differently to high temperature.‘Red Globe’,‘Fujiminori’,‘Beta’,‘Hetianhuang’had strong heat tolerance,while‘Thompson Seedless’,‘Hongqi Tezaomeigui’,‘Shuijing Wuhe’,‘Victoria’,‘Yatomi Rosa’and‘Crimson Seedless’had weak heat tolerance.(2)Among the 12 physiological indexes,malondialdehyde content and antioxidant enzyme activity were mostly different among various grape *** grape cultivars with strong heat tolerance,‘Red Globe’and‘Fujiminori’,had relatively lower malondialdehyde contents,while‘Beta’and‘Hetianhuang’had relatively higher malondialdehyde *** they had higher activity of antioxidant enzymes.(3)The results of fuzzy membership function analysis showed that the cumulative membership value(AR)of each physiological index was consistent with its apparent heat tolerance performance,suggesting that AR can be a potential index for the evaluation of heat tolerance of grape *** cluster analysis classified the tested cultivars as strong,medium and weak.‘Red Globe’,‘Fujiminori’,‘Beta’and‘Hetianhuang’had strong heat tolerance.[Conclusions]This study provides a reference for grape cultivation under hig

关键词： Grape Physiological index High temperature response heat tolerance