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Recognition of the inducible,secretory small protein OsSSP1 by the membrane receptor OsSSR1 and the co-receptor OsBAK1 confers rice resistance to the blast fungus

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Molecular Plant 2024年第5期17卷 807-823页

作者： Tianfeng Zhao Shijie Ma Ziying Kong Haimiao Zhang Yi Wang Junzhe Wang Jiazong Liu Wanzhen Feng Tong Liu Chunyan Liu Suochen Liang Shilin Lu Xinyu Li Haipeng Zhao Chongchong Lu Muhammad Zunair Latif Ziyi Yin Yang Li Xinhua Ding State key laboratory of crop biology Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect PestsCollege of Plant ProtectionShandong Agricultural UniversityTaian 271018ShandongChina College of Breeding and Multiplication(Sanya institute of Breeding and Multiplication) Hainan UniversitySanya 572024HainanChina

The plant apoplast,which serves as the frontline battleground for long-term host–pathogen interactions,harbors a wealth of disease resistance ***,the identification of the disease resistance proteins in the apoplast is relatively *** this study,we identified and characterized the rice secretory protein OsSSP1(Oryza sativa secretory small protein 1).OsSSP1 can be secreted into the plant apoplast,and either in vitro treatment of recombinant OsSSP1 or overexpression of OsSSP1 in rice could trigger plant immune *** expression of OsSSP1 is suppressed significantly during Magnaporthe oryzae infection in the susceptible rice variety Taibei 309,and OsSSP1-overexpressing lines all show strong resistance to *** the knockout and overexpression results,we found that OsSSP1 positively regulates plant immunity in response to fungal ***,the recognition and immune response triggered by OsSSP1 depend on an uncharacterized transmembrane OsSSR1(secretory small protein receptor 1)and the key co-receptor OsBAK1,since most of the induced immune response and resistance are lost in the absence of OsSSR1 or ***,the OsSSP1 protein is relatively stable and can still induce plant resistance after 1 week of storage in the open environment,and exogenous OsSSP1 treatment for a 2-week period did not affect rice ***,our study reveals that OsSSP1 can be secreted into the apoplast and percepted by OsSSR1 and OsBAK1 during fungal infection,thereby triggering the immune response to enhance plant resistance to *** findings provide novel resources and potential strategies for crop breeding and disease control.

关键词： rice plant apoplast OsssP1 receptor plant resistance Magnaporthe oryzae

Antagonistic MADS-box transcription factors SEEDSTICK and SEPALLATA3 form a transcriptional regulatory network that regulates seed oil accumulation

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Journal of Integrative Plant biology 2024年第1期66卷 121-142页

作者： Shuangcheng He Yuanchang Min Zijin Liu Fang Zhi Rong Ma Ankang Ge Shixiang Wang Yu Zhao Danshuai Peng Da Zhang Minshan Jin Bo Song Jianjun Wang Yuan Guo Mingxun Chen State key laboratory for crop Stress Resistance and High‐Efficiency Production National Yangling Agricultural Biotechnology&Breeding CenterShaanxi Key Laboratory of Crop HeterosisCollege of AgronomyNorthwest A&F UniversityYangling 712100China State key laboratory for crop Stress Resistance and High‐Efficiency Production Shaanxi Key Laboratory of AppleCollege of HorticultureNorthwest A&F UniversityYangling 712100China

Transcriptional regulation is essential for balancing multiple metabolic pathways that influence oil accumulation in *** far,the transcriptional regulatory mechanisms that govern seed oil accumulation remain largely ***,we identified the transcriptional regulatory network composed of MADS-box transcription factors SEEDSTICK(STK)and SEPALLATA3(SEP3),which bridges several key genes to regulate oil accumulation in *** found that STK,highly expressed in the developing embryo,positively regulates seed oil accumulation in Arabidopsis(Arabidopsis thaliana).Furthermore,we discovered that SEP3 physically interacts with STK in vivo and in *** oil content is increased by the SEP3 mutation,while it is decreased by SEP3 *** chromatin immunoprecipitation,electrophoretic mobility shift assay,and transient dual-luciferase reporter assays showed that STK positively regulates seed oil accumulation by directly repressing the expression of MYB5,SEP3,and SEED FATTY ACID REDUCER 4(SFAR4).Moreover,genetic and molecular analyses demonstrated that STK and SEP3 antagonistically regulate seed oil production and that SEP3 weakens the binding ability of STK to MYB5,SEP3,and ***,we demonstrated that TRANSPARENT TESTA 8(TT8)and ACYL-ACYL CARRIER PROTEIN DESATURASE 3(AAD3)are direct targets of MYB5 during seed oil accumulation in ***,our findings provide the transcriptional regulatory network antagonistically orchestrated by STK and SEP3,which fine tunes oil accumulation in seeds.

关键词： seed oil accumulation SEP3 STK transcription factor transcriptional regulation

Strategies for improving crop comprehensive benefits via a decision-making system based on machine learning in the rice‒rape,rice‒wheat and rice‒garlic rotation systems in Southwest China

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Journal of Integrative Agriculture 2024年第9期23卷 2970-2988页

作者： Xinrui Li Xiafei Li Tao Liu Huilai Yin Hao Fu Yongheng Luo Yanfu Bai Hongkun Yang Zhiyuan Yang Yongjian Sun Jun Ma Zongkui Chen crop Ecophysiology and Cultivation key laboratory of Sichuan Province/rice Research institute/State key laboratory of crop Gene Exploration and Utilization in Southwest China/Sichuan Agricultural University Chengdu 611130China College of Grassland science and Technology Sichuan Agricultural UniversityChengdu 611130China College of Agronomy Sichuan Agricultural UniversityChengdu 611130China

rice‒rape,rice‒wheat and rice‒garlic rotations are common cropping systems in Southwest China,and they have played a significant role in ensuring ecological and economic benefits(EB)and addressing the challenges of China’s food security in the ***,the crop yields in these rotation systems are 1.25‒14.73%lower in this region than the national *** decision-making with machine learning can analyze the key factors for obtaining better benefits,but it has rarely been used to enhance the probability of obtaining such benefits from rotations in Southwest ***,we used a data-intensive approach to construct an intelligent decision‒making system with machine learning to provide strategies for improving the benefits of rice-rape,rice-wheat,and rice-garlic rotations in Southwest *** results show that raising the yield and partial fertilizer productivity(PFP)by increasing seed input under high fertilizer application provided the optimal benefits with a 10%probability in the rice-garlic *** high yields and greenhouse gas(GHG)emissions by increasing the N application and reducing the K application provided suboptimal benefits with an 8%probability in the rice-rape *** N and P to enhance PFP and yield provided optimal benefits with the lowest probability(8%)in the rice‒wheat *** on the predictive analysis of a random forest model,the optimal benefits were obtained with fertilization regimes by reducing N by 25%and increasing P and K by 8 and 74%,respectively,in the rice-garlic system,reducing N and K by 54 and by 36%,respectively,and increasing P by 38%in rice-rape system,and reducing N by 4%and increasing P and K by 65 and 23%in rice-wheat *** strategies could be further optimized by 17‒34%for different benefits,and all of these measures can improve the effectiveness of the crop rotation systems to varying ***,these findings provide insights into optimal agricultural inputs for higher be

关键词： rice rotation agricultural management greenhouse gas emissions comprehensive benefits fertilizer management

GSW3.1,a novel gene controlling grain size and weight in rice

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The crop Journal 2024年第3期12卷 796-802页

作者： Yifei Jiang Mingao Zhou Simin Ke Xiaoxiao Deng Yangsheng Li State key laboratory of Hybrid rice Key Laboratory for Research and Utilization of Heterosis in Indica RiceMinistry of AgricultureCollege of Life SciencesWuhan UniversityWuhan 430072HubeiChina

Grain size and weight are closely related traits determining yield in rice(Oryza sativa L.).Since indica and japonica rice varieties differ significantly in multiple traits,a high-generation recombinant inbred line(RIL)population derived from the crossing LH9(indica)and RPY(japonica)was used to map grainrelated traits in six *** of the quantitative trait loci(QTL)for thousand-grain weight showed that combinations of multiple QTL significantly increased the phenotypic effect.A novel gene named GSW3.1 controlling grain size and weight was discovered using the major QTL for the colocalization of grain width and thousand-grain weight on chromosome *** editing revealed that GSW3.1(LOC_Os03g16850)was pleiotropic,positively regulating grain size and weight while affecting several other agronomic *** analysis indicated that some traits,including grain width and weight,were highly correlated with indica-japonica differentiation.

关键词： rice Grain size and weight 3.1(GSW3.1) Quantitative trait locus Haplotype analysis

qSTA2-2,a novel QTL that contributes to seed starch synthesis in Zea mays L.

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Journal of Integrative Agriculture 2024年第4期23卷 1118-1133页

作者： Minghao Cai Xuhui Li Zhi Liang Jie Wang Delin Li Zhipeng Yuan Riliang Gu Jianhua Wang Li Li State key laboratory of Maize Bio-breeding/key laboratory of crop Heterosis Utilization Ministry of Education/Beijing Innovation Center for Crop Seed Technology/College of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193China institute of Nanfan&Seed Industry Guangdong Academy of ScienceGuangzhou 510316China institute of crop sciences Chinese Academy of Agricultural SciencesBeijing 100081China

The seed storage materials accumulate during seed development,and are essential for seed germination and seedling *** we employed two bi-parental populations of an F2:3 population developed from a cross of improved 220(I220,small seeds with low starch)and PH4CV(large seeds with high starch),as well as recombinant-inbred lines(RILs)of X178(high starch)and its improved introgression line I178(low starch),to identify the genes that control seed storage *** identified a total of 12 QTLs for starch,protein and oil,which explained 3.44-10.79%of the phenotypic *** them,qSTA2-1 identified in F2:3 and qSTA2-2 identified in the RILs partially overlapped at an interval of 7.314-9.554 Mb,and they explained 3.44-10.21%of the starch content variation,so they were selected for further *** mapping of qSTA2-2 with the backcrossed populations of ^(I220)/PH4CV in each generation narrowed it down to a 199.7 kb interval that contains 14 open reading frames(ORFs).Transcriptomic analysis of developing seeds from the near-isogenic lines(NILs)of ^(I220)/PH4CV(BC_(5)F_(2))showed that only 11 ORFs were expressed in 20 days after pollination(DAP)*** of them were upregulated and six of them were downregulated in NIL^(I220),and the differentially expressed genes(DEGs)between NIL^(I220) and NIL^(PH4CV) were enriched in starch metabolism,hormone signal transduction and glycosaminoglycan *** the eleven NIL^(I220) differential expressed ORFs,ORF4(Zm00001d002260)and ORF5(Zm00001d002261)carry 75%protein sequence similarity,both encodes an glycolate oxidase,were the possible candidates of *** analysis and validation indicated that mutation of the qSTA2-2 locus resulted in the dysfunction of ABA accumulation,the embryo/endosperm ratio and the starch and hormone levels.

关键词： QTL mapping seed starch transcriptomic analysis hormone

A bacterial protein Rhp-PSP inhibits plant viral proliferation through endoribonuclease activity

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Journal of Integrative Agriculture 2024年第6期23卷 1967-1978页

作者： Lijie Chen Qianze Peng Xiaohua Du Weixing Zhang Ju’e Cheng Shu’e Sun Deyong Zhang Pin Su Yong Liu Longping Branch College of BiologyHunan UniversityChangsha 410082China State key laboratory of Hybrid rice/institute of Plant Protection Hunan Academy of Agricultural SciencesChangsha 410125China

Plant virus causes massive crop losses ***,there is currently no effective measure to control plant viral ***,we identify an antiviral protein Rhp-PSP,produced by the bacterial Rhodopseudomonas palustris strain *** this study,we discover that the antiviral activity of Rhp-PSP relies on its endoribonuclease *** the arginine(R)residue at position 129 onto alanine(A)abolishs its endoribonuclease activity on coat protein(CP)RNA of tobacco mosaic virus(TMV),consequentially,compromises the antiviral activity of *** investigation demonstrates that,the mutant Rhp-PSP^(R129A)is unable to form the homotrimer as the wild type,indicating the importance of quaternary junction for the endoribonuclease *** of Rhp-PSP in Nicotiana benthamiana significantly enhances the resistance against TMV of seedlings,while expression of Rhp-PSP^(R129A)did not,confirming that endoribonuclease activity is responsible for the antiviral activity of *** addition,foliar spray of Rhp-PSP solution on tomato and pepper plants significantly reduces the disease index of viral diseases,indicating that Rhp-PSP shows potential to develop antiviral agent in practice.

关键词： Rhodopseudomonas palustris Rhp-PSP tobacco mosaic virus endoribonuclease antiviral activity

The OsWRKY72-OsAAT30/OsGSTU26 module mediates reactive oxygen species scavenging to drive heterosis for salt tolerance in hybrid rice

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Journal of Integrative Plant biology 2024年第4期66卷 709-730页

作者： Citao Liu Bigang Mao Yanxia Zhang Lei tian Biao Ma Zhuo Chen Zhongwei Wei Aifu Li Ye Shao Gongye Cheng Lingling Li Wenyu Li Di Zhang Xiaoping Ding Jiangxiang Peng Yulin Peng Jiwai He Nenghui Ye Dingyang Yuan Chengcai Chu Meijuan Duan Hunan Provincial key laboratory of Stress biology College of AgricultureHunan Agricultural UniversityChangsha 410128China State key laboratory of Hybrid rice Hunan Hybrid Rice Research CenterChangsha 410125China College of Agriculture South China Agricultural UniversityGuangzhou 510642China State key laboratory of Wheat and Maize crop science Center for Crop Genome EngineeringCollege of AgronomyHenan Agricultural UniversityZhengzhou 450002China College of Horticulture Fujian Agriculture and Forestry UniversityFuzhou 350002China Department of Computational Medicine and Bioinformatics University of MichiganAnn ArborMI 48109 USA Biobin Data science Co. Ltd.Changsha 410221China

Hybrid rice(Oryza sativa)generally outperforms its inbred parents in yield and stress tolerance,a phenomenon termed heterosis,but the underlying mechanism is not completely ***,we combined transcriptome,proteome,physiological,and heterosis analyses to examine the salt response of super hybrid rice Chaoyou1000(CY1000).In addition to surpassing the mean values for its two parents(mid-parent heterosis),CY1000 exhibited a higher reactive oxygen species scavenging ability than both its parents(over-parent heterosis or heterobeltiosis).Nonadditive expression and allele-specific gene expression assays showed that the glutathione S-transferase gene OsGSTU26 and the amino acid transporter gene OsAAT30 may have major roles in heterosis for salt tolerance,acting in an overdominant fashion in ***,we identified OsWRKY72 as a common transcription factor that binds and regulates OsGSTU26 and *** salt-sensitive phenotypes were associated with the OsWRKY72^(paternal)genotype or the OsAAT30^(maternal)genotype in core rice germplasm ***72^(paternal)specifically repressed the expression of OsGSTU26 under salt stress,leading to salinity sensitivity,while OsWRKY72^(maternal)specifically repressed OsAAT30,resulting in salinity *** results suggest that the OsWRKY72-OsAAT30/OsGSTU26 module may play an important role in heterosis for salt tolerance in an overdominant fashion in CY1000 hybrid rice,providing valuable clues to elucidate the mechanism of heterosis for salinity tolerance in hybrid rice.

关键词： allele-specific gene expression(ASE) heterosis hybrid rice nonadditive effect(NAE) salt tolerance transcriptome and proteome

C-terminal frameshift mutations generate viable knockout mutants with developmental defects for three essential protein kinases

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aBIOTECH 2024年第2期5卷 219-224页

作者： Yun Zhang Miao-Miao Cui Run-Nan Ke Yue-Dan Chen Kabin Xie national key laboratory of crop Genetic Improvement Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China Hubei key laboratory of Plant Pathology Huazhong Agricultural UniversityWuhan 430070China

Loss-of-function mutants are fundamental resources for gene function ***,it is difficult to generate viable and heritable knockout mutants for essential ***,we show that targeted editing of the C-terminal sequence of the embryo lethal gene MITOGEN-ACTIVATED PROTEIN KINASES 1(OsMPK1)results in weak *** C-terminal-edited osmpk1 mutants displayed severe developmental defects and altered disease resistance but generated tens of viable seeds that inherited the *** the same C-terminal editing approach,we also obtained viable mutants for a wallassociated protein kinase(Os07g0493200)and a leucine-rich repeat receptor-like protein kinase(Os01g0239700),while the null mutations of these genes were *** data suggest that protein kinase activity could be reduced by introducing frameshift mutations adjacent to the C-terminus,which could generate valuable resources for gene function studies and tune protein kinase activity for signaling pathway engineering.

关键词： CRISPR/Cas9 Lethal mutant Protein kinases Genome editing C-terminus

rice melatonin deficiency causes premature leaf senescence via DNA methylation regulation

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The crop Journal 2024年第3期12卷 721-731页

作者： Yue Lu Ahmed Gharib Rujia Chen Hanyao Wang Tianyun Tao Zhihao Zuo Qing Bu Yanze Su Yaoqing Li Yanmo Luo Hamdi F.El-Mowafi Zhichao Wang Qianfeng Huang Shuting Wang Yang Xu Pengcheng Li Chenwu Xu Zefeng Yang Jiangsu key laboratory of crop Genomics and Molecular Breeding/Zhongshan Biological Breeding laboratory/key laboratory of Plant Functional Genomics of the Ministry of Education Agriculture College of Yangzhou UniversityYangzhou 225009JiangsuChina Jiangsu Co-Innovation Center for Modern Production Technology of Grain crops Jiangsu Key Laboratory of Crop Genetics and PhysiologyYangzhou UniversityYangzhou 225009JiangsuChina national institute of Laser Enhanced sciences(NILES) Cairo UniversityGiza 12613Egypt rice Research Department Field Crops Research InstituteAgricultural Research CenterSakhaKafr El-Sheikh 33717Egypt

In a study of DNA methylation changes in melatonin-deficient rice mutants,mutant plants showed premature leaf senescence during grain-filling and reduced grain *** deficiency led to transcriptional reprogramming,especially of genes involved in chlorophyll and carbon metabolism,redox regulation,and transcriptional regulation,during dark-induced leaf *** of mCG and mCHG in the melatonin-deficient rice mutants was associated with the expression change of both protein-coding genes and transposable element-related *** in gene expression and DNA methylation in the melatonin-deficient mutants were compensated by exogenous application of melatonin.A decreased S-adenosyl-L-methionine level may have contributed to the DNA methylation variations in rice mutants of melatonin deficiency under dark conditions.

关键词： Melatonin Premature leaf senescence rice DNA methylation Epigenetic regulation