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rice science 2024年第2期31卷 129-133,I0001-I0016页

作者： ZHANG Huali CHEN Junyu LI Ruiqing WANG Huimei DAI Dongqing LIANG Minmin WU Mingyue MA Liangyong State Key Laboratory of rice Biology and Breeding/Chinese National center for rice Improvement China National Rice Research InstituteHangzhou 310006China

Two-line hybrid rice with excellent quality is preferred in the Chinese ***,there is a trade-off between reducing costs for hybrid seed production and lowering the outcrossing rate of the sterile line,which is largely determined by the stigma exsertion rate(SER).In this study,we constructed mutants of male sterility lines with improved grain length(GL)and SER in three elite early-season indica rice varieties through targeted manipulation of the TMS5 and GS3 genes using CRISPR/Cas9-mediated multiplex *** obtained a series of marker-free gs3 single mutants and gs3tms5 double mutants with significantly higher SER,longer grains,and increased 1000-grain weight compared with the wild type(WT).Importantly,the typically thermo-sensitive genic male sterile(TGMS)trait with a higher SER was observed in gs3tms5 mutants,and their F1 hybrids exhibited remarkable improvements in grain shape and yield-related *** findings provided an efficient method to generate new valuable TGMS germplasm with improved SER through the mutagenesis of GS3 and TMS5 synergistically,and demonstrated that GS3 had pleiotropic effects on grain size,SER,and grain quality in early-season indica rice.

关键词： sterile elite season

OsbZIP01 Affects Plant Growth and Development by Regulating OsSD1 in rice

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rice science 2024年第1期31卷 77-86,I0018,I0019页

作者： DONG Xinli ZHOU Yang ZHANG Yaqi RONG Fuxi DU Jiahong HONG Zheyuan HU Peisong LÜYusong College of Agriculture and Biotechnology Zhejiang UniversityHangzhou 310058China State Key Laboratory of rice Biology and Breeding/China National center for rice Improvement China National Rice Research InstituteHangzhou 310006China

As the‘Green Revolution’gene,SD1(encoding GA20ox2),has been widely applied to improve yield in rice ***,research on its transcriptional regulation is ***,we identified a transcription factor OsbZIP01,which can suppress the expression of SD1 and regulate gibberellin(GA)biosynthesis in *** mutants of OsbZIP01 exhibited increased plant height,while the overexpression lines showed a semi-dwarf phenotype and diminished germination ***,the semi-dwarf phenotype of OE-bZIP01,was caused by the reduced internode length,which was accompanied by a thin stem *** predominant expression of OsbZIP01 was observed in leaves and ***01 protein was localized in the nucleus and showed transcriptional repression *** addition,OsbZIP01 could directly bind to the promoter of the OsSD1 gene,and inhibit its *** semi-dwarf phenotype of OE-bZIP01 could be rescued by exogenous GA_(3).Meanwhile,the bzip01 sd1 double mutant showed a shorter shoot length compared with the wild type,indicating that OsbZIP01 regulated plant growth mainly through the GA biosynthesis ***,OsbZIP01 negatively regulates GA biosynthesis by restraining SD1 transcription,thereby affecting plant growth and development.

关键词： OsbZIP01 SD1 gibberellin biosynthesis dwarf and germination

An orchestrated ethylene-gibberellin signaling cascade contributes to mesocotyl elongation and emergence of rice direct seeding

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Journal of Integrative Plant Biology 2024年第7期66卷 1427-1439页

作者： Yusong Lyu Xinli Dong Shipeng Niu Ruijie Cao Gaoneng Shao Zhonghua Sheng Guiai Jiao Lihong Xie Shikai Hu Shaoqing Tang Xiangjin Wei Peisong Hu State Key Laboratory of rice Biology and Breeding China National Center for Rice ImprovementChina National Rice Research InstituteHangzhou 310006China College of Agriculture and Biotechnology Zhejiang UniversityHangzhou 310058China

A mechanized direct seeding of rice with less labor and water usage,has been widely ***,this approach requires varieties that exhibit uniform seedling *** elongation(ME)offers the main drive of fast emergence of rice seedlings from soils;nevertheless,its genetic basis remains ***,we identify a major rice quantitative trait locus Mesocotyl Elongation1(qME1),an allele of the Green Revolution gene Semi-Dwarf1(SD1),encoding GA20-oxidase for gibberellin(GA)***1 expression is strongly induced by soil depth and *** rice grains are direct-seeded in soils,the ethylene core signaling factor OsEIL1 directly promotes ME1 transcription,accelerating bioactive GA *** GAs further degrade the DELLA protein SLENDER rice 1(SLR1),alleviating its inhibition of rice PHYTOCHROME-INTERACTING FACTOR-LIKE13(OsPIL13)to activate the downstream expansion gene OsEXPA4 and ultimately promote rice seedling ME and *** ancient traits of long mesocotyl and strong emergence ability in wild rice and landrace were gradually lost in company with the Green Revolution dwarf breeding process,and an elite ME1-R allele(D349H)is found in some modern Geng varieties(long mesocotyl lengths)in northern China,which can be used in the direct seeding and dwarf breeding of Geng ***,the ectopic and high expression of ME1 driven by mesocotyl-specific promoters resulted in rice plants that could be direct-seeded without obvious plant architecture or yield ***,we reveal the molecular mechanism of rice ME,and provide useful information for breeding new Green Revolution varieties with long mesocotyl suitable for direct-seeding practice.

关键词： rice(Oryza sativa L.) direct seeding Green Revolu-tion mesocotyl elongation ethylene gibberellin semi-dwarf1(SD1)

Interaction Between Ustilaginoidea virens and rice and Its Sustainable Control

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rice science 2024年第3期31卷 269-284页

作者： ZHANG Fengmin CAO Zhenzhen ZHENG Xin HE Yuntao CHEN Mingxue LIN Xiaoyan rice Product Quality Inspection&Supervision Testing center of Ministry of Agriculture and Rural Affairs China National Rice Research InstituteHangzhou 310006China

Ustilaginoidea virens is a common rice pathogen that can easily lead to a decline in rice quality and the production of toxins pose potential risks to human *** this review,we present a comprehensive literature review of research since the discovery of rice false *** provide a comprehensive and,at times,critical overview of the main results and findings from related research,and propose future research ***,we delve into the interaction between *** and rice,including the regulation of transcription factors,the process of *** infecting rice panicles,and the plant immune response caused by rice *** that,we discuss the identification and characterization of mycotoxins produced by the pathogenic fungus,as well as strategies for disease *** emphasize the importance of comprehensive agricultural prevention and control methods for the sustainable management of *** knowledge will update our understanding of the interaction between *** and rice plants,offering a valuable perspective for those interested in ***.

关键词： rice false smut flower-specific infection mycotoxin food safety plant disease

A polygalacturonase gene OsPG1 modulates water homeostasis in rice

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The Crop Journal 2024年第1期12卷 79-91页

作者： Qinwen Zou Ranran Tu Jiajun Wu Tingting Huang Zhihao Sun Zheyan Ruan Hongyu Cao Shihui Yang Xihong Shen Guanghua He Hong Wang rice Research Institute Key Laboratory of Application and Safety Control of Genetically Modified CropsAcademy of Agricultural SciencesSouthwest UniversityChongqing 400715China State Key Laboratory of rice Biology and Breeding Key Laboratory for Zhejiang Super Rice ResearchChina National Center for Rice ImprovementChina National Rice Research InstituteHangzhou 311401ZhejiangChina

A dynamic plant architecture is the basis of plant adaptation to changing *** many genes regulating leaf rolling have been identified,genes directly associated with water homeostasis are largely ***,we isolated a rice mutant,dynamic leaf rolling 1(dlr1),characterized by‘leaf unfolding in the morning-leaf rolling at noon-leaf unfolding in the evening’during a sunny *** content was decreased in rolled leaves and water sprayed on leaves caused reopening,indicating that in vivo water deficiency induced the leaf ***-based cloning and expression tests demonstrated that an A1400G single base mutation in Oryza sativa Polygalacturonase 1(OsPG1)/PHOTO-SENSITIVE LEAF ROLLING 1(PSL1)was responsible for the dynamic leaf rolling phenotype in the dlr1 ***1 encodes a polygalacturonase,one of the main enzymes that degrade demethylesterified homogalacturonans in plant cell ***1 was constitutively expressed in various tissues and was enriched in *** of the OsPG1 gene exhibited defects in stomatal closure and decreased stomatal density,leading to reduced transpiration and excessive water loss under specific conditions,but had normal root *** analysis revealed that mutation of OsPG1 led to reduced pectinase activity in the leaves and increased demethylesterified homogalacturonans in guard *** findings reveal a mechanism by which OsPG1 modulates water homeostasis to control dynamic leaf rolling,providing insights for plants to adapt to environmental variation.

关键词： Photosynthesis Stomata Transpiration Leaf rolling

Single-cell transcriptome sequencing reveals the mechanism regulating rice plumule development

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The Crop Journal 2024年第3期12卷 688-697页

作者： Mingdong Zhu Meng Zhang Kunyong Huang Feifei Lu Hong Wang Shaolu Zhao Yinghong Yu Shaoqing Tang Haining Wu Peisong Hu Xiangjin Wei State Key Laboratory of rice Biology and Breeding China National Center for Rice ImprovementChina National Rice Research InstituteHangzhou 310006ZhejiangChina b State Key Laboratory of Hybrid rice Hunan Rice Research InstituteHunan Academy of Agricultural SciencesChangsha 410125HunanChina Hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental Regulation College of BiologyHunan UniversityChangsha 410082HunanChina Hubei University Wuhan 430062HubeiChina

Seed plumules comprise multiple developing tissues and are key sites for above-ground plant organ ***,the spatial expression of genes in developing rice seed plumules was characterized by single-cell transcriptome sequencing in Zhongjiazao 17,a popular Chinese indica rice *** 15 cell clusters,13 were assigned to cell types using marker genes and cluster-specific *** genes of multiple cell types were expressed in several clusters,suggesting a complex developmental *** genes for signaling by phytohormones such as abscisic acid were highly expressed in specific *** cis-elements in the promoters of genes specifically expressed in cell clusters were calculated,and some key hormone-related motifs were frequent in certain *** expression patterns of genes involved in rapid seed germination,seedling growth,and development were *** findings enhanced our understanding of cellular diversity and specialization within plumules of rice,a monocotyledonous model crop.

关键词： rice Plumule Single-cell sequencing Regulatory network

A 48-bp deletion upstream of LIGULELESS 1 alters rice panicle architecture

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The Crop Journal 2024年第2期12卷 354-363页

作者： Linhua Wu Min Hu Shuwei Lyu Wenfeng Chen Hang Yu Qing Liu Wei He Chen Li Zuofeng Zhu rice Research Institute Guangdong Academy of Agricultural SciencesGuangzhou 510640GuangdongChina National center for Evaluation of Agricultural Wild Plants(rice) Department of Plant Genetics and BreedingChina Agricultural UniversityBeijing 100193China State Key Laboratory for rice Biology and Breeding China National Rice Research InstituteHangzhou 310006ZhejiangChina Key Laboratory of Genetics and Breeding of High Quality rice in Southern China(Co-construction by Ministry and Province) Ministry of Agriculture and Rural AffairsGuangzhou 510640GuangdongChina Guangdong Key Laboratory of New Technology in rice Breeding Guangzhou 510640GuangdongChina Guangdong rice Engineering Laboratory Guangzhou 510640GuangdongChina

Panicle architecture is an agronomic determinant of crop yield and a target for cereal crop *** investigate its molecular mechanisms in rice,we performed map-based cloning and characterization of OPEN PANICLE 1(OP1),a gain-of-function allele of LIGULELESS 1(LG1),controlling the spread-panicle *** allele results from a 48-bp deletion in the LG1 upstream region and promotes pulvinus development at the base of the primary *** OP1 expression and altered panicle phenotype in chimeric transgenic plants and upstream-region knockout mutants indicated that the deletion regulates spread-panicle architecture in the mutant spread panicle 1(sp1).Knocking out BRASSINOSTEROID UPREGULATED1(BU1)gene in the background of OP1 complementary plants resulted in compact panicles,suggesting OP1 may regulate inflorescence architecture via the brassinosteroid signaling *** regard that manipulating the upstream regulatory region of OP1 or genes involved in BR signal pathway could be an efficient way to improve rice inflorescence architecture.

关键词： Upstream region Panicle architecture Gene expression BR rice

Changes in Leaf Stomatal Properties in rice with the Growing Season

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Phyton-International Journal of Experimental Botany 2024年第4期93卷 807-817页

作者： Jiana Chen Fangbo Cao Min Huang rice and Product Ecophysiology Key Laboratory of Ministry of Education for Crop Physiology and Molecular BiologyHunan Agricultural UniversityChangsha410128China National Engineering Research center of rice Hunan Agricultural UniversityChangsha410128China

Transplanting rice varieties grown in different seasons can lead to different yields due to different dry matterproduction. Early-season rice varieties transplanted in the late season can obtain high yields with short-growthduration and higher yields driven by higher dry matter production. To make clear the variations in dry matterproduction across seasons, four early-season rice varieties were chosen for late-season transplantation. The grainyield, dry matter accumulation, leaf photosynthetic, and leaf stomatal properties were studied. It was observedthat the average yields of these four varieties in the late season were 33% greater, despite a reduced growth periodof 13 days in comparison with the early season. Furthermore, there was a notable increase in both total and postheadingdry matter production during the late season. The leaf net photosynthetic rate, stomatal area, stomatalwidth, and stomatal length were higher in the late season. Despite no significant difference in stomatal densitybetween seasons, strong positive linear relationships were observed between net photosynthetic rate and stomatalconductance, and between stomatal conductance and area. These relationships demonstrate that the increase ofthe stomatal width and length of the leaves in the late season leads to an increase in the stomatal area, therebyincreasing the stomatal conductance and enhancing the photosynthesis of the leaves. Consequently, this leads togreater dry matter production and a higher yield compared to the early season. Therefore, when breeding newhigh-yielding and short-growing varieties, the large stomatal area can be used as a reference index.

关键词： Photosynthesis rice stomatal properties season yield

The UDP-glycosyltransferase OsUGT706D2 positively regulates cold and submergence stress tolerance in rice

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The Crop Journal 2024年第3期12卷 732-742页

作者： Qing Liu Lanlan Zhang Shuwei Lyu Hang Yu Wenjie Huang Liqun Jiang Jing Zhang Bingrui Sun Xingxue Mao Pingli Chen Junlian Xing Wenfeng Chen Zhilan Fan Shijuan Yan Chen Li Guangdong Key Laboratory of New Technology in rice Breeding/Guangdong rice Engineering Laboratory/Key Laboratory of Genetics and Breeding of High Quality rice in Southern China(Co-construction by Ministry and Province) Ministry of Agriculture and Rural AffairsRice Research InstituteGuangdong Academy of Agricultural SciencesGuangzhou 510640GuangdongChina Guangdong Key Laboratory for Crop Germplasm Resources Preservation and Utilization Agro-biological Gene Research CenterGuangdong Academy of Agricultural SciencesGuangzhou 510640GuangdongChina

In a genome-wide association study,we identified a rice UDP-glycosyltransferase gene,OsUGT706D2,whose transcription was activated in response to cold and submergence stress and to exogenous abscisic acid(ABA).OsUGT706D2 positively regulated the biosynthesis of tricin-4’-O-(syringyl alcohol)ether-7-O-glucoside at both the transcriptional and metabolic ***706D2 mediated cold and submergence tolerance by modulating the expression of stress-responsive genes as well as the abscisic acid(ABA)signaling *** of function of OsUGT706D2 increased cold and submergence tolerance and loss of function of OsUGT706D2 reduced cold *** positively regulated OsUGT706D2-mediated cold tolerance but reduced submergence *** findings suggest the potential use of OsUGT706D2 for improving abiotic stress tolerance in rice.

关键词： UDP-glycosyltransferase rice Cold tolerance Submergence tolerance ABA

Cloning, Characterization and Transformation of Methyltransferase 2a Gene (Zmet2a) in Maize (Zea mays L.)

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Phyton-International Journal of Experimental Botany 2024年第7期93卷 1767-1779页

作者： Xin Qi Yu Wang Xing Zhang Xiaoshuang Wei Xinyang Liu Zhennan Wang Zhenhui Wang Fenglou Ling Faculty of Agronomy Jilin Agricultural UniversityChangchun130118China rice Research center Jilin Agricultural UniversityChangchun130118China

DNA methylation is an important epigenetic regulatory mechanism,it regulates gene expression by recruiting proteins involved in gene repression or by inhibiting the binding of transcription factor(s)to *** this study,a novel methyltransferase 2a gene(Zmet2a)was cloned in maize and identiﬁed by polymerase chain reaction-base(PCR-base)using a bioinformatics *** Zmet2a cDNA sequence is 2739 bp long and translates to 912 amino acid *** Zmet2a protein revealed that it contains BAH and CHROMO structural domains,is a non-transmembrane protein that is hydrophilically unstable,and has no signal peptide ***,we veriﬁed the biological roles of Zmet2a using transgenic Arabidopsis overexpressing Zmet2a and Zmet2a-knockout *** Zmet2a Arabidopsis thaliana showed highly signiﬁcant advancement inﬂowering time,and Zmet2a-knockout maize showed advancement inﬂowering time,with signiﬁcant changes in several ***,these report the role of Zmet2a in the regulation ofﬂowering time,which will lay a foundation for revealing the biological function and epigenetic regulation mechanism of Zmet2a in the growth,development andﬂowering of maize.

关键词： DNA methylation methyltransferase Zea mays L ﬂowering time functional analysis