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Genetic and lipidomic analyses reveal the key role of lipid metabolism for cold tolerance in maize

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Journal of Genetics and Genomics 2024年第3期51卷 326-337页

作者： Lei Gao Haifang Jiang Minze Li Danfeng Wang Hongtao Xiang Rong Zeng Limei Chen Xiaoyan Zhang Jianru Zuo shuhua yang Yiting Shi State Key Laboratory of Plant Environmental Resilience College of Biological SciencesFrontiers Science Center for Molecular Design BreedingCenter for Crop Functional Genomics and Molecular BreedingChina Agricultural UniversityBeijing 100193China State Key Laboratory of Wheat&Maize Crop Science College of Life SciencesHenan Agricultural UniversityZhengzhouHenan 450002China State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Suihua Branch of Heilongjiang Academy of Agricultural Machinery Sciences SuihuaHeilongjiang 152052China

Lipid remodeling is crucial for cold tolerance in ***,the precise alternations of lipidomics during cold responses remain elusive,especially in maize(Zea mays L.).In addition,the key genes responsible for cold tolerance in maize lipid metabolism have not been ***,we integrate lipidomic,transcriptomic,and genetic analysis to determine the profile of lipid remodeling caused by cold *** find that the homeostasis of cellular lipid metabolism is essential for maintaining cold tolerance of ***,we detect 210 lipid species belonging to 13 major classes,covering phospholipids,glycerides,glycolipids,and free fatty *** lipid metabolites undergo specific and selective alterations in response to cold stress,especially mono-/di-unsaturated lysophosphatidic acid,lysophosphatidylcholine,phosphatidylcholine,and phosphatidylinositol,as well as polyunsaturated phosphatidic acid,monogalactosyldiacylglycerol,diacylglycerol,and *** addition,we identify a subset of key enzymes,including ketoacyl-acyl-carrier protein synthase II(KAS II),acyl-carrier protein 2(ACP2),male sterility33(Ms33),and stearoyl-acyl-carrier protein desaturase 2(SAD2)involved in glycerolipid biosynthetic pathways are positive regulators of maize cold *** results reveal a comprehensive lipidomic profile during the cold response of maize and provide genetic resources for enhancing cold tolerance in crops.

关键词： Maize Cold stress Lipid metabolism Transcriptome Lipidomic

Ca^(2+)-independent ZmCPK2 is inhibited by Ca^(2+)-dependent ZmCPK17 during drought response in maize

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Journal of Integrative Plant Biology 2024年第7期66卷 1313-1333页

作者： Xiaoying Hu Jinkui Cheng Minmin Lu Tingting Fang Yujuan Zhu Zhen Li Xiqing Wang Yu Wang Yan Guo shuhua yang Zhizhong Gong State Key Laboratory of Plant Environmental Resilience Frontiers Science Center for Molecular Design BreedingCenter for Crop Functional Genomics and Molecular BreedingCollege of Biological SciencesChina Agricultural UniversityBeijing 100193China College of Life Sciences Institute of Life Science and Green DevelopmentHebei UniversityBaoding 071002China

Calcium oscillations are induced by different ***-dependent protein kinases(CDPKs/CPKs)are one major group of the plant calcium decoders that are involved in various processes including drought *** CPKs are ***,we identified ZmCPK2 as a negative regulator of drought resistance by screening an overexpression transgenic maize *** found that ZmCPK2 does not bind calcium,and its activity is mainly inhibited during short term abscisic acid(ABA)treatment,and dynamically changed in prolonged ***,ZmCPK2 interacts with and is inhibited by calcium-dependent ZmCPK17,a positive regulator of drought resistance,which is activated by ***17 could prevent the nuclear localization of ZmCPK2 through phosphorylation of ***2 interacts with and phosphorylates and activates ZmYAB15,a negative transcriptional factor for drought *** results suggest that drought stress-induced Ca^(2+)can be decoded directly by ZmCPK17 that inhibits ZmCPK2,thereby promoting plant adaptation to water deficit.

关键词： CDPK drought response phosphorylation stomatal movement transcriptional regulation

Genetic variation in a heat shock transcription factor modulates cold tolerance in maize

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MOLECULAR PLANT 2024年第9期17卷 1423-1438页

作者： Gao, Lei Pan, Lingling Shi, Yiting Zeng, Rong Li, Zhuoyang Zhang, Xuan Zhao, Xiaoming Gong, Xinru Huang, Wei yang, Xiaohong Lai, Jinsheng Zuo, Jianru Gong, Zhizhong Wang, Xiqing Jin, Weiwei Dong, Zhaobin yang, shuhua China Agr Univ Frontiers Sci Ctr Mol Design Breeding Ctr Crop Funct Genom & Mol Breeding State Key Lab Plant Environm ResilienceColl Biol Beijing 100193 Peoples R China China Agr Univ Natl Maize Improvement Ctr Frontiers Sci Ctr Mol Design Breeding Dept Plant Genet & BreedingState Key Lab Maize Bi Beijing Peoples R China Chinese Acad Sci State Key Lab Plant Genom Inst Genet & Dev Biol Beijing 100101 Peoples R China Chinese Acad Sci Inst Genet & Dev Biol Natl Plant Gene Res Ctr Beijing 100101 Peoples R China

Understanding how maize (Zea mays) responds to cold stress is crucial for facilitating breeding programs of cold-tolerant varieties. Despite extensive utilization of the genome-wide association study (GWAS) approach for exploring favorable natural alleles associated with maize cold tolerance, few studies have successfully identified candidate genes that contribute to maize cold tolerance. In this study, we used a diverse panel of inbred maize lines collected from different germplasm sources to perform a GWAS on variations in the relative injured area of maize true leaves during cold stress-a trait very closely correlated with maize cold tolerance. We identified HSF21, which encodes a B-class heat shock transcription factor (HSF) that positively regulates cold tolerance at both the seedling and germination stages. Natural variations in the promoter of the cold-tolerant HSF21(Hap1) allele led to increased HSF21 expression under cold stress by inhibiting binding of the basic leucine zipper bZIP68 transcription factor, a negative regulator of cold tolerance. By integrating transcriptome deep sequencing, DNA affinity purification sequencing, and targeted lipidomic analysis, we revealed the function of HSF21 in regulating lipid metabolism homeostasis to modulate cold tolerance in maize. In addition, we found that HSF21 confers maize cold tolerance without incurring yield penalties. Collectively, this study establishes HSF21 as a key regulator that enhances cold tolerance in maize, providing valuable genetic resources for breeding of cold-tolerant maize varieties.

关键词： heat shock factor HSF21 cold tolerance natural variation bZIP68 lipid metabolism maize QUANTITATIVE TRAIT LOCI CHILLING TOLERANCE FREEZING TOLERANCE LIPID CHANGES STRESS MEMBRANE ARCHITECTURE IMPACTS PLANTS YIELD

COLD1: a cold sensor in rice

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Science China(Life Sciences) 2015年第4期58卷 409-410页

作者： SHI YiTing yang shuhua State Key Laboratory of Plant Physiology and Biochemistry College of Biological Sciences China Agricultural University

Rice （Oryza sativa L.） is one of the most important food crops in the world. Originating in tropical and subtropical regions, rice cultivars are grouped into two major subspecies, indica （0. sativa ssp. indica） and japonica （0. sativa ssp. japonica）, indica cultivars grown in low latitude areas are sensitive to low temperature, while japonica cultivars with more resistance to cold temperature are grown in temperate and frigid zones [1,2]. Low temperature is a major factor that affects rice production and distribution worldwide. Scientists have been making great efforts to identify genes that control chilling tolerance traits of rice. However, the molecular mechanism underlying the chilling adaptation *** is unknown.

关键词：水稻品种传感器亚热带地区粳稻品种籼稻品种 Oryza 低纬度地区粮食作物

Molecular Regulation of Plant Responses to Environmental Temperatures

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Molecular Plant 2020年第4期13卷 544-564页

作者： yanglin Ding Yiting Shi shuhua yang State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China

Temperature is a key factor governing the growth and development,distribution,and seasonal behavior of *** entireplant life cycle is affected by environmental *** grow rapidly and exhibit specific changes in morphology under mild average temperature conditions,a response termed *** exposed to chilling or moist chilling low temperatures,flowering or seed germination is accelerated in some plant species;these processes are known as vernalization and cold stratification,***,once many temperate plants are exposed to chilling temperatures for some time,they can acquire the ability to resist freezing stress,a process termed cold *** the face of global climate change,heat stress has emerged as a frequent challenge,which adversely affects plant growth and *** this review,we summarize and discuss recent progress in dissecting them olecular mechanism sregulating plant thermomorphogenesis,vernalization,and responses to extreme *** also discuss the remaining issues that are crucial for understanding the interactions between plants and temperature.

关键词： cold stress heat stress plants temperature responses thermomorphogenesis vernalization

Insights into the regulation of C-repeat binding factors in plant cold signaling

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Journal of Integrative Plant Biology 2018年第9期60卷 780-795页

作者： Jingyan Liu Yiting Shi shuhua yang State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China Crops Research Institute Tianjin Academy of Agricultural SciencesTianjin 300384China

Cold temperatures, a major abiotic stress, threaten the growth and development of plants, worldwide. To cope with this adverse environmental cue, plants from temperate climates have evolved an array of sophisticated mechanisms to acclimate to cold periods, increasing their ability to tolerate freezing stress. Over the last decade, significant progress has been made in determining the molecular mechanisms underpinning cold acclimation, including following the identification of several pivotal components, including candidates for cold sensors, protein kinases, and transcription factors. With these developments, we have a better understanding of the CBF-dependent cold-signaling pathway. In this review, we summarize recent progress made in elucidating the cold-signaling pathways, especially the C-repeat binding factor-dependent pathway, and describe the regulatory function of the crucial components of plant cold signaling. We also discuss the unsolved questions that should be the focus of future work.

关键词： Insights into the regulation of C-repeat binding factors in plant cold signaling ICE FLC

基于HER-TD3算法的青皮核桃采摘机械臂路径规划

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农业机械学报 2024年第4期55卷 113-123页

作者：杨淑华谢晓波邴振凯郝建军张秀花袁大超河北农业大学机电工程学院保定071001 河北省智慧农业装备技术创新中心保定071001

针对青皮核桃和树枝等障碍物无序生长导致机械臂采摘环境复杂、训练任务量大、稳定性差等普遍存在的问题,本文设计了一种同步带模组与机械臂协作的采摘装置,并采用基于事后经验回放的双延迟深度确定性策略梯度算法(Twin delayed deep de... 详细信息

针对青皮核桃和树枝等障碍物无序生长导致机械臂采摘环境复杂、训练任务量大、稳定性差等普遍存在的问题,本文设计了一种同步带模组与机械臂协作的采摘装置,并采用基于事后经验回放的双延迟深度确定性策略梯度算法(Twin delayed deep deterministic policy gradient with hindsight experience replay,HER-TD3)对采摘机械臂进行路径规划,通过HER算法提高智能体的探索能力,缓解稀疏奖励的问题;通过TD3算法提高智能体的稳定性,减少了训练中出现的震荡现象。为了证明HER-TD3算法的可行性和泛化能力,引入TD3、HER-DDPG算法进行对比,采用降维训练方法对3种深度强化学习智能体进行训练,结果表明HER-TD3算法模型在完成路径规划任务中成功率达到98%,与HER-DDPG算法相比提高4个百分点,与TD3算法相比提高19个百分点;在CoppeliaSim软件中搭建三维模型仿真环境,设计初始姿态和碰撞检测,使用YOLO v4识别青皮核桃,通过该算法模型能够引导虚拟采摘机械臂避开树枝障碍物达到目标位置,完成无碰撞路径规划,无障碍物和有障碍物时路径规划成功率分别为91%和86%;利用物理样机进行青皮核桃采摘试验时,仍能较好地完成路径规划任务,无障碍物时采摘路径规划成功率为86.7%,平均运动时间为12.8 s,有障碍物时采摘路径规划成功率为80.0%,平均运动时间为13.6 s,验证了HER-TD3算法对复杂环境具有较好的适应性和稳定性。

关键词：青皮核桃采摘机器人机械臂 HER-TD3算法路径规划

Genetic and molecular exploration of maize environmental stress resilience:Toward sustainable agriculture

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Molecular Plant 2023年第10期16卷 1496-1517页

作者： Zhirui yang Yibo Cao Yiting Shi Feng Qin Caifu Jiang shuhua yang State Key Laboratory of Plant Environmental Resilience Frontiers Science Center for Molecular Design BreedingCollege of Biological SciencesChina Agricultural UniversityBeijing 100193China

Global climate change exacerbates the effects of environmental stressors,such as drought,flooding,extreme temperatures,salinity,and alkalinity,on crop growth and grain yield,threatening the sustainability of the food ***(Zea mays)is one of the most widely cultivated crops and the most abundant grain crop in production ***,the stability of maize yield is highly dependent on environmental ***,great progress has been made in understanding the molecular mechanisms underlying maize responses to environmental stresses and in developing stress-resilient varieties due to advances in high-throughput sequencing technologies,multi-omics analysis platforms,and automated phenotyping *** this review,we summarize recent advances in dissecting the genetic factors and networks that contribute to maize abiotic stress tolerance through diverse *** also discuss future challenges and opportunities for the development of climate-resilient maize varieties.

关键词： maize abiotic stress drought extreme temperatures salinity resistance

Integration of light and temperature signaling pathways in plants

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Journal of Integrative Plant Biology 2022年第2期64卷 393-411页

作者： Lijuan Qi Yiting Shi William Terzaghi shuhua yang Jigang Li State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing100193 China Department of Biology Wilkes UniversityWilkes-BarrePennsylvania18766 USA

As two of the most important environmental factors,light and temperature regulate almost all aspects of plant growth and *** natural conditions,light is accompanied by warm temperatures and darkness by cooler temperatures,suggesting that light and temperature are tightly associated signals for ***,accumulating evidence shows that plants have evolved a wide range of mechanisms to simultaneously perceive and respond to dynamic changes in light and ***,the photoreceptor phytochrome B(phy B)was recently shown to function as a thermosensor,thus reinforcing the notion that light and temperature signaling pathways are tightly associated in *** this review,we summarize and discuss the current understanding of the molecular mechanisms integrating light and temperature signaling pathways in plants,with the emphasis on recent progress in temperature sensing,light control of plant freezing tolerance,and *** also discuss the questions that are crucial for a further understanding of the interactions between light and temperature signaling pathways in plants.

关键词： crosstalk light temperature