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OsPRMT6a-mediated arginine methylation of OsJAZ1 regulates jasmonate signaling and spikelet development in rice

Molecular Plant 2024年第6期17卷 900-919页

作者： Kun Dong Fuqing Wu Siqi Cheng Shuai Li Feng Zhang Xinxin Xing Xin Jin Sheng Luo Miao Feng Rong Miao Yanqi Chang Shuang Zhang Xiaoman You Peiran Wang Xin Zhang Cailin Lei Yulong Ren Shanshan Zhu Xiuping Guo Chuanyin Wu Dong-Lei Yang Qibing Lin Zhijun Cheng Jianmin Wan State key laboratory of crop gene resources and Breeding National Key Facility for Crop Gene Resources and Genetic ImprovementInstitute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China State key laboratory for crop genetics and germplasm enhancement Nanjing Agricultural UniversityNanjing 210095China

Although both protein arginine methylation(PRMT)and jasmonate(JA)signaling are crucial for regulating plant development,the relationship between these processes in the control of spikelet development remains *** this study,we used the CRISPR/Cas9 technology to generate two OsPRMT6a loss-of-function mutants that exhibit various abnormal spikelet ***,we found that OsPRMT6a can methylate arginine residues in JA signal repressors OsJAZ1 and *** showed that arginine methylation of OsJAZ1 enhances the binding affinity of OsJAZ1 with the JA receptors OsCOI1a and OsCOI1b in the presence of JAs,thereby promoting the ubiquitination of OsJAZ1 by the SCF^(OsCOI1a/OsCOI1b) complex and degradation via the 26S *** process ultimately releases OsMYC2,a core transcriptional regulator in the JA signaling pathway,to activate or repress JA-responsive genes,thereby maintaining normal plant(spikelet)***,in the osprmt6a-1 mutant,reduced arginine methylation of OsJAZ1 impaires the interaction between OsJAZ1 and OsCOI1a/OsCOI1b in the presence of *** a result,OsJAZ1 proteins become more stable,repressing JA responses,thus causing the formation of abnormal spikelet ***,we discovered that JA signaling reduces the OsPRMT6a mRNA level in an OsMYC2-dependent manner,thereby establishing a negative feedback loop to balance JA *** further found that OsPRMT6a-mediated arginine methylation of OsJAZ1 likely serves as a switch to tune JA signaling to maintain normal spikelet development under harsh environmental conditions such as high ***,our study establishes a direct molecular link between arginine methylation and JA signaling in rice.

关键词： protein arginine methylation jasmonate signaling negative feedback loop spikelet development adaptation to heat stress rice

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Natural variation of GmFNSII-2 contributes to drought resistance by modulating enzyme activity in soybean

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The crop Journal 2024年第2期12卷 529-539页

作者： Huihui Gao Pengcheng Wei Yongzhe Gu Pengbin Tang Yifan Shen Lei Yang Linxin Dong Haowei Zheng Kuo Shu Mayamiko Masangano Bin Dong Long Miao Jiajia Li Lijuan Qiu Xiaobo Wang School of Agronomy Anhui Agricultural UniversityHefei 230036AnhuiChina State key laboratory of crop gene resources and Breeding The National Key Facility for Crop Gene Resources and Genetic Improvement(NFCRI)/Key Laboratory of Crop Gene Resource and Germplasm Enhancement(MOA)Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

As an essential crop that provides vegetable oil and protein,soybean(Glycine max(L.)Merr.)is widely planted all over the ***,the scarcity of water resources worldwide has seriously impacted on the quality and yield of *** address this,exploring excellent genes for improving drought resistance in soybean is *** this study,we identified natural variations of GmFNSII-2(flavone synthase II)significantly affect the drought resistance of *** sequence analysis of GmFNSII-2 in 632 cultivated and 44 wild soybeans nine haplotypes were *** full-length allele GmFNSII-2^(C),but not the truncated allele GmFNSII-2^(A) possessing a nonsense nucleotide variation,increased enzyme *** research found that GmDREB3,known to increase soybean drought resistance,bound to the promoter region of GmFNSII-2^(C).GmDREB3 positively regulated the expression of GmFNSII-2^(C),increased flavone synthase abundance and improved the drought ***,a singlebase mutation in the GmFNSII-2^(C) promoter generated an additional drought response element(CCCCT),which had stronger interaction strength with GmDREB3 and increased its transcriptional activity under drought *** frequency of drought-resistant soybean varieties with Hap 1(Pro:GmFNSII-2^(C))has increased,suggesting that this haplotype may be selected during soybean *** summary,GmFNSII-2^(C) could be used for molecular breeding of drought-tolerant soybean.

关键词： Drought stress Flavone synthase GmFNSII-2 Natural variation Drought response element

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genetic and molecular mechanisms of reproductive isolation in the utilization of heterosis for breeding hybrid rice

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Journal of genetics and Genomics 2024年第6期51卷 583-593页

作者： Chaolong Wang Xiaowen Yu Jian Wang Zhigang Zhao Jianmin Wan State key laboratory for crop genetics&germplasm enhancement and Utlization Nanjing Agricultural UniversityZhongshan Biological Breeding LaboratoryNanjingJiangsu210095China State key laboratory of crop gene resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Heterosis,also known as hybrid vigor,is commonly observed in rice *** hybridization of rice species or subspecies exhibits robust hybrid vigor,however,the direct harnessing of this vigor is hindered by reproductive ***,we review recent advances in the understanding of the molecular mechanisms governing reproductive isolation in inter-subspecific and inter-specific *** review encompasses the genetic model of reproductive isolation within and among Oryza sativa species,emphasizing the essential role of mitochondria in this ***,we delve into the molecular intricacies governing the interaction between mitochondria and autophagosomes,elucidating their significant contribution to reproductive ***,our exploration extends to comprehending the evolutionary dynamics of reproductive isolation and speciation in *** on these advances,we offer a forward-looking perspective on how to overcome the challenges of reproductive isolation and facilitate the utilization of heterosis in future hybrid rice breeding endeavors.

关键词： Hybrid vigor Reproductive isolation Hybrid ricebreeding

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genetic analysis and fine mapping of a grain size QTL in the smallgrain sterile rice line Zhuo201S

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Journal of Integrative agriculture 2024年第7期23卷 2155-2163页

作者： Bin Lei Jiale Shao Feng Zhang Jian Wang Yunhua Xiao Zhijun Cheng Wenbang Tang Jianmin Wan College of Agronomy Hunan Agricultural UniversityChangsha 410128China National key Facility for crop gene resources and genetic Improvement/Institute of crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China State key laboratory for crop genetics and germplasm enhancement/Jiangsu Plant gene Engineering Research Center Nanjing Agricultural UniversityNanjing 210095China State key laboratory of Hybrid Rice Hunan Hybrid Rice Research CenterChangsha 410125China

The development and application of the small-grain rice sterile line Zhuo201S(Z201S)has demonstrated its potential for mechanized hybrid rice seed production,leading to significant cost ***,the molecular mechanism responsible for the small-grain size characteristic of Z201S remains *** this study,we conducted a genetic analysis using near-isogenic lines constructed from Z210S,a small-grain rice sterile line,and R2115,a normal-grain *** results revealed that the small-grain trait in Z201S is governed by a single partially dominant gene which also enhances grain *** mapping,we localized the causal gene to the short arm of chromosome 2,within a 113 kb physical region delimited by the molecular markers S2-4-1 and *** analysis and gene expression assays indicated LOC_Os02g14760 as the most likely candidate gene,suggesting that the small-grain size trait of Z201S is controlled by a novel locus that has not been previously identified.

关键词： rice grain size map-based cloning

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Exploiting viral vectors to deliver genome editing reagents in plants

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aBIOTECH 2024年第2期5卷 247-261页

作者： Yilin Shen Tao Ye Zihan Li Torotwa Herman Kimutai Hao Song Xiaoou Dong Jianmin Wan State key laboratory of crop genetics and germplasm enhancement and Utilization Jiangsu Collaborative Innovation Centre for Modern Crop ProductionJiangsu Engineering Research Center for Plant Genome EditingNanjing Agricultural UniversityNanjing 210095China Zhongshan Biological Breeding laboratory Nanjing 210014China Hainan Seed Industry laboratory Sanya 572025China State key laboratory of crop gene resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Genome editing holds great promise for the molecular breeding of plants,yet its application is hindered by the shortage of simple and effective means of delivering genome editing reagents into *** plant transformation-based methods for delivery of genome editing reagents into plants often involve prolonged tissue culture,a labor-intensive and technically challenging process for many elite crop *** this review,we describe various virus-based methods that have been employed to deliver genome editing reagents,including components of the CRISPR/Cas machinery and donor DNA for precision editing in *** update the progress in these methods with recent successful examples of genome editing achieved through virus-based delivery in different plant species,highlight the advantages and limitations of these delivery approaches,and discuss the remaining challenges.

关键词： Plant genome engineering Genome editing CRISPR/Cas Virus-based delivery

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Knockout of a rice K5.2 gene increases Ca accumulation in the grain

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Journal of Integrative Plant Biology 2024年第2期66卷 252-264页

作者： Peitong Wang Naoki Yamaji Namiki Mitani-Ueno Jun Ge Jian Feng Ma National key laboratory of crop genetics&germplasm enhancement and Utilization College of Resources and Environmental SciencesNanjing Agricultural UniversityNanjing 210095China Institute of Plant Science and resources Okayama UniversityKurashiki 710-0046Japan

Rice is a staple food for half of the world’s population,but it is a poor dietary source of calcium(Ca)due to the low *** is an important issue to boost Ca concentration in this grain to improve Ca deficiency risk,but the mechanisms underlying Ca accumulation are poorly ***,we obtained a rice(Oryza sativa)mutant with high shoot Ca *** mutant exhibited 26%-53% higher Ca in shoots than did wild-type rice(WT)at different Ca *** concentration in the xylem sap was 36% higher in the mutant than in the *** was no difference in agronomic traits between the WT and mutant,but the mutant showed 25% higher Ca in the polished grain compared with the ***-based cloning combined with a complementation test revealed that the mutant phenotype was caused by an 18-bp deletion of a gene,OsK5.2,belonging to the Shaker-like K+channel ***5.2 was highly expressed in the mature region of the roots and its expression in the roots was not affected by Ca levels,but upregulated by low *** showed that OsK5.2 was mainly expressed in the pericycle of the *** together,our results revealed a novel role for OsK5.2 in Ca translocation in rice,and will be a good target for Ca biofortification in rice.

关键词： accumulation biofortification calcium OsK5.2 pericycle rice translocation

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Two types of coumarins-specific enzymes complete the last missing steps in pyran- and furanocoumarins biosynthesis

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Acta Pharmaceutica Sinica B 2024年第2期14卷 869-880页

作者： Yucheng Zhao Yuedong He Liangliang Han Libo Zhang Yuanzheng Xia Fucheng Yin Xiaobing Wang Deqing Zhao Sheng Xu Fei Qiao Yibei Xiao Lingyi Kong Department of resources Science of Traditional Chinese Medicines School of Traditional Chinese Pharmacyand State Key Laboratory of Natural MedicinesChina Pharmaceutical UniversityNanjing 210009China College of Bioscience and Biotechnology Hunan Agricultural UniversityChangsha 410128China Jiangsu key laboratory of Bioactive Natural Product Research and State key laboratory of Natural Medicines Department of Natural Medicinal ChemistryChina Pharmaceutical UniversityNanjing 210009China key laboratory of crop gene resources and germplasm enhancement in Southern China Ministry of AgricultureTropical Crops Genetic Resources InstituteChinese Academy of Tropical Agricultural SciencesHaikou 517317China Institute of Botany Jiangsu Province and Chinese Academy of SciencesNanjing 210014China Department of Pharmacology School of Pharmacyand State Key Laboratory of Natural MedicinesChina Pharmaceutical UniversityNanjing 210009China

Pyran-and furanocoumarins are key representatives of tetrahydropyrans and tetrahydrofurans,respectively,exhibiting diverse physiological and medical ***,the biosynthetic mechanisms for their core structures remain poorly *** we combined multiomics analyses of biosynthetic enzymes in Peucedanum praeruptorum and in vitro functional verification and identified two types of key enzymes critical for pyran and furan ring biosynthesis in *** included three distinct *** prenyltransferases(PpPT1e3)responsible for the prenylation of the simple coumarin skeleton 7 into linear or angular precursors,and two novel CYP450 cyclases(PpDC and PpOC)crucial for the cyclization of the linear/angular precursors into either tetrahydropyran or tetrahydrofuran *** analyses of cyclases indicated that acid/base-assisted epoxide ring opening contributed to the enzyme-catalyzed tetrahydropyran and tetrahydrofuran ring *** possible acid/base-assisted catalytic mechanisms of the identified cyclases were theoretically investigated and assessed using site-specific *** identified two possible acidic amino acids Glu303 in PpDC and Asp301 in PpOC as vital in the catalytic *** study provides new enzymatic tools in the epoxide formation/epoxide-opening mediated cascade reaction and exemplifies how plants become chemically diverse in terms of enzyme function and catalytic process.

关键词： Tetrahydropyrans Tetrahydrofurans Baldwin rules Coumarins CYP450cyclase

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The RNA binding protein EHD6 recruits the m^(6)A reader YTH07 and sequesters OsCOL4 mRNA into phase-separated ribonucleoprotein condensates to promote rice flowering

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Molecular Plant 2024年第6期17卷 935-954页

作者： Song Cui Peizhe Song Chaolong Wang Saihua Chen Benyuan Hao Zhuang Xu Liang Cai Xu Chen Shanshan Zhu Xiangchao Gan Hui Dong Yuan Hu Liang Zhou Haigang Hou Yunlu Tian Xi Liu Liangming Chen Shijia Liu Ling Jiang Haiyang Wang Guifang Jia Shirong Zhou Jianmin Wan State key laboratory for crop genetics&germplasm enhancement and Utilization Zhongshan Biological Breeding LaboratoryNational Observation and Research Station of Rice Germplasm ResourcesNanjing Agricultural UniversityNanjing 210095China State key laboratory for crop gene resources and Breeding Institute of Crop ScienceChinese Academy of Agricultural SciencesBeijing 100081China Synthetic and Functional Biomolecules Center Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking-Tsinghua Center for Life SciencesBeijing Advanced Center of RNA BiologyPeking UniversityBeijingChina Jiangsu key laboratory of crop Genomics and Molecular Breeding Agricultural College of Yangzhou UniversityYangzhou 225009China Max Planck Institute for Plant Breeding Research Carl-von-Linne´-Weg 1050829 KolnGermany

N6-Methyladenosine(m^(6)A)is one of the most abundant modifications of eukaryotic mRNA,but its comprehensive biological functionality remains further *** this study,we identified and characterized a new flowering-promoting gene,EARLY HEADING DATE6(EHD6),in ***6 encodes an RNA recognition motif(RRM)-containing RNA binding protein that is localized in the non-membranous cytoplasm ribonucleoprotein(RNP)granules and can bind both m^(6)A-modified RNA and unmodified RNA *** found that EHD6 can physically interact with YTH07,a YTH(YT521-B homology)domain-containing m^(6)A *** showed that their interaction enhances the binding of an m^(6)A-modified RNA and triggers relocation of a portion of YTH07 from the cytoplasm into RNP granules through phase-separated *** these condensates,the mRNA of a rice flowering repressor,CONSTANS-like 4(OsCOL4),becomes sequestered,leading to a reduction in its protein abundance and thus accelerated flowering through the Early heading date 1 *** together,these results not only shed new light on the molecular mechanism of efficient m^(6)A recognition by the collaboration between an RNA binding protein and YTH family m^(6)A reader,but also uncover the potential for m^(6)A-mediated translation regulation through phaseseparated ribonucleoprotein condensation in rice.

关键词： N6-methyladenosine m^(6)A EHD6 YTH domain-containing protein phase separation heading date

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Evolutionary genomics of climatic adaptation and resilience to climate change in alfalfa

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Molecular Plant 2024年第6期17卷 867-883页

作者： Fan Zhang Ruicai Long Zhiyao Ma Hua Xiao Xiaodong Xu Zhongjie Liu Chunxue Wei Yiwen Wang Yanling Peng Xuanwen Yang Xiaoya Shi Shuo Cao Mingna Li Ming Xu Fei He Xueqian Jiang Tiejun Zhang Zhen Wang Xianran Li Long-Xi Yu Junmei Kang Zhiwu Zhang Yongfeng Zhou Qingchuan Yang Institute of Animal Science Chinese Academy of Agricultural SciencesBeijing 100193China National key laboratory of tropical crop Breeding Shenzhen BranchGuangdong Laboratory of Lingnan Modern AgricultureKey Laboratory of Synthetic BiologyMinistry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518000China School of Grassland Science Beijing Forestry UniversityBeijing 100083China Department of Agronomy and Horticulture University of Nebraska-LincolnLincolnNE 68583USA Department of crop and Soil Sciences Washington State UniversityPullmanWA 99163USA U.S.Department of agriculture-Agricultural Research Service Plant Germplasm Introduction and Testing ResearchProsserWA 99350USA National key laboratory of tropical crop Breeding Tropical Crops Genetic Resources InstituteChinese Academy of Tropical Agricultural SciencesHaikou 571101China

Given the escalating impact of climate change on agriculture and food security,gaining insights into the evolutionary dynamics of climatic adaptation and uncovering climate-adapted variation can empower the breeding of climate-resilient crops to face future climate ***(Medicago sativa ***),the queen of forages,shows remarkable adaptability across diverse global environments,making it an excellent model for investigating species responses to climate *** this study,we performed population genomic analyses using genome resequencing data from 702 accessions of 24 Medicago species to unravel alfalfa’s climatic adaptation and genetic susceptibility to future climate *** found that interspecific genetic exchange has contributed to the gene pool of alfalfa,particularly enriching defense and stress-response *** introgression between *** ***(***)and alfalfa not only aids alfalfa’s climatic adaptation but also introduces genetic burden.A total of 1671 genes were associated with climatic adaptation,and 5.7%of them were introgressions from *** integrating climate-associated variants and climate data,we identified populations that are vulnerable to future climate change,particularly in higher latitudes of the Northern *** findings serve as a clarion call for targeted conservation initiatives and breeding *** also identified preadaptive populations that demonstrate heightened resilience to climate fluctuations,illuminating a pathway for future breeding ***,this study enhances our understanding about the local adaptation mechanisms of alfalfa and facilitates the breeding of climate-resilient alfalfa cultivars,contributing to effective agricultural strategies for facing future climate change.

关键词： Medicago local adaptation population genetics adaptive introgression genetic vulnerability alfalfa breeding

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ICE1 interacts with IDD14 to transcriptionally activate QQS to increase pollen germination and viability

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Journal of Integrative Plant Biology 2024年第8期66卷 1801-1819页

作者： Landi Luo Yan Zheng Xieshengyang Li Qian Chen Danni Yang Zhijia Gu Ya Yang Yunqiang Yang Xiangxiang Kong Yongping Yang CAS key laboratory of tropical Plant resources and Sustainable Use Xishuangbanna Tropical Botanical GardenThe Chinese Academy of SciencesXishuangbanna 666303China germplasm Bank of Wild Species Yunnan Key Laboratory for Crop Wild Relatives OmicsKunming Institute of BotanyThe Chinese Academy of SciencesKunming 650201China School of agriculture Yunnan UniversityKunming 650091China key laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyThe Chinese Academy of SciencesKunming 650201China

In flowering plants,sexual reproductive success depends on the production of viable pollen ***,the mechanisms by which QUA QUINE STARCH(QQS)regulates pollen development and how transcriptional activators facilitate the transcription of QQS in this process remain poorly ***,we demonstrate that INDUCER OF CBF EXPRESSION 1(ICE1),a basic helix–loop–helix(b HLH)transcription factor,acts as a key transcriptional activator and positively regulates QQS expression to increase pollen germination and viability in Arabidopsis thaliana by interacting with INDETERMINATE DOMAIN14(IDD14).In our genetic and biochemical experiments,overexpression of ICE1 greatly promoted both the activation of QQS and high pollen viability mediated by ***14 additively enhanced ICE1 function by promoting the binding of ICE1 to the QQS *** addition,mutation of ICE1 significantly repressed QQS expression;the impaired function of QQS and the abnormal anther dehiscence jointly affected pollen development of the ice1-2 *** results also showed that the enhancement of pollen activity by ICE1 depends on ***,QQS interacted with CUT1,the key enzyme for long-chain lipid *** interaction both promoted CUT1 activity and regulated pollen lipid metabolism,ultimately determining pollen hydration and *** results not only provide new insights into the key function of QQS in promoting pollen development by regulating pollen lipid metabolism,but also elucidate the mechanism that facilitates the transcription of QQS in this vital developmental process.

关键词： transcriptional metabolism jointly

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