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Mediator tail module subunits MED16 and MED25 differentially regulate abscisic acid signaling in Arabidopsis

Journal of Integrative plant Biology 2021年第4期63卷 802-815页

作者： Pengcheng Guo Leelyn Chong Fangming Wu Chuan-Chih Hsu Chuanyou Li Jian-Kang Zhu Yingfang Zhu State Key Laboratory of Crop Stress Adaptation and improvement Key Laboratory of Cotton BiologySchool of Life SciencesHenan UniversityKaifeng 475001China State Key Laboratory of plant Genomics National Center for Plant Gene ResearchInstitute of Genetics and Developmental BiologyInnovation Academy for Seed Designthe Chinese Academy of SciencesBeijing 100101China Institute of plant and Microbial Biology Academia SinicaTaipei 11529 Shanghai Center for plant Stress Biology Shanghai Institutes for Biological Sciencesthe Chinese Academy of SciencesShanghai 200032China department of Horticulture and Landscape Architecture Purdue UniversityWest LafayetteIndiana 47907USA

MED25 has been implicated as a negative regulator of the abscisic acid(ABA)signaling ***,it is unclear whether other Mediator subunits could associate with MED25 to participate in the ABA ***,we used affinity purification followed by mass spectrometry to uncover Mediator subunits that associate with MED25 in transgenic *** found that at least26 Mediator subunits,belonging to the head,middle,tail,and CDK8 kinase modules,were copurified with MED25 in ***,the tail module subunit MED16 was identified to associate with MED25 under both mock and ABA *** further showed that the disruption of MED16 led to reduced ABA sensitivity compared to the wild *** analysis revealedthattheexpressionofseveral ABA-responsive genes was significantly lower in med16 than those in wild ***,we discovered that MED16 may possibly compete with MED25 to interact with the key transcription factor ABA INSENSITIVE 5(ABI5)to positively regulate ABA ***,med16 and med25 mutants displayed opposite phenotypes in ABA response,cuticle permeability,and differential ABI5-mediated EM1 and EM6 ***,our data indicate that MED16 and MED25 differentially regulate ABA signaling byantagonisticallyaffectingABI5-mediated transcription in Arabidopsis.

关键词： ABI5 abscisic acid MED16 MED25 mediator signaling

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Genetics of carotenoids for provitamin A biofortification in tropical-adapted maize

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The Crop Journal 2016年第4期4卷 313-322页

作者： Alhassan D.Halilu Shehu G.Ado Daniel A.Aba Inuwa S.Usman department of plant Science Institute for Agricultural Research Ahmadu Bello University

Yellow maize contains high levels of β-carotene(βC), making it an important crop for combating vitamin A deficiency through biofortification. In this study, nine maize inbred lines were selected at random from 31 provitamin A(PVA) maize inbred lines and crossed in a partial diallel mating design to develop 36 crosses. The crosses were evaluated in the field in two locations(Samaru and Kerawa) and their seed carotenoid content were determined by high-performance liquid chromatography. The modes of gene action, heritability, and correlations between agronomic traits and carotenoid content were estimated. Additive genetic variances(σ~2a) were lower than non-additive genetic variances(σ~2d) for all the carotenoids, plant height(PH), and grain yield(GY), suggesting a preponderance of non-additive gene action. Broad-sense heritability(H^2) was high(H^2> 60%) for zeaxanthin,days to anthesis, and PH, moderate(30% improvement of PVA and GY in the sample of tropical-adapted maize.

关键词： Biofortification Tropical-adapted maize Provitamin A Carotenoids Gene actions Correlations

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Genome-wide association of 10 horticultural traits with expressed sequence tag-derived SNP markers in a collection of lettuce lines

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The Crop Journal 2013年第1期1卷 25-33页

作者： Soonjae Kwon Ivan Simko Barbara Hellier Beiquan Mou Jinguo Hu US department of Agriculture–Agricultural research Service Western Regional Plant Introduction Station 59 Johnson Hall Washington State University US department of Agriculture–Agricultural research Service Crop Improvement Protection Research Unit US department of Agriculture–Agricultural research Service Crop Improvement Protection Research Unit 1636 East Alisal Street Salinas CA 93905 USA

Genetic diversity, population structure, and genome-wide marker-trait association analyses were conducted on a special collection of 298 homozygous lettuce(Lactuca sativa L.) lines. Each of these lines was derived from a single plant that had been genotyped with 384 SNP markers using LSGermOPA. They included 122 butterhead, 53 romaine, 63 crisphead, 53 leaf and 7 stem types. Genetic diversity among these plants was assessed by pairwise comparison based on 322 high-quality SNP markers selected from 384 SNPs. Only 258 unique genotypes were identified among the 298 lines because 26 pairs or small groups(a total of 66 lines) shared identical genotypes. The average genetic similarity coefficient(GS) among these unique genotypes was 63.9% with a range of 40.6% to 99.8%. A phylogenetic tree was constructed based on the genotypic data. The most likely number of populations was estimated to be two or six. Association analysis between the 322 SNP markers and 10 phenotypic traits using the 258 homozygous lines was performed by three different methods: single factor analysis, general linear model analysis, and mixed linear model analysis. Nine significant marker-trait associations(SMTAs) were detected at P seed coat color, one for leaf undulation, two for leaf anthocyanin, and one for stem anthocyanin. These markers will be useful in marker-assisted selection after further validation with segregating populations.

关键词： LSGermOPA Genome wide association study SMTA Significant marker trait association Genetic diversity Population structure

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Screening of Potato Lines Including department Genetic &National plant Gene Bank of Iran for Resistance to Early Blight (<i>Alternaria. solani</i>) Using Culture Filtrate Produced by the Fungus

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American Journal of plant Sciences 2013年第10期4卷 2043-2047页

作者： Hamid Reza Mirkarimi Ahmad Abasi Moghadam Javad Mozafari department of Genetics & National plant Gene-Bank Seed and Plant Improvement Institute Mahdasht RD Karaj Iran. department of plant breeding Faculty of Agriculture Science and Research Branch Islamic Azad University Tehran Iran

Potato is a plant that can be influenced by early blight disease. Early blight is one of the most destructive plant diseases, especially in the members of solanaceae family. This disease can reduce yield. Experiment design was a factorial randomized complete design to evaluate the isolate pathogenic Alternaria solani in National plant Gene Bank of Iran, during 2008-2009. This experiment was conducted with three replications, and the factors include test methods and three lines 9506, 10908-05 and 10908-18 with genotypes of Agria, Casmos and Desiree (susceptible) and Delta (resistant control). Analysis of variance table was based on the area under the disease progress curve, indicating the effects of the experimental methods;genotype and their interactions are significant at the 1% level. In greenhouse evaluation, the symptoms appeared on, the first day. In this method the area under the curve progression was noted in 10 times, but in vitro method, the symptoms of this evaluation appeared on the first or second day. The Evaluation was carried out after inoculation, and was noted 6 times. The results indicate that genotypes and lines are located in four different groups. In this case, line 9506 and Cosmos were quite sensitive to the surface, and Desiree, is located in a sensitive area. Line 10908-18 and Agria, located approximately at the level of resistance, and line 10908-05 and Delta, have been resistant surface.

关键词： Screen Culture Filtrate Early Blight Severity

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plant pan-genomics and its applications

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Molecular plant 2023年第1期16卷 168-186页

作者： Junpeng Shi Zhixi Tian Jinsheng Lai Xuehui Huang State Key Laboratory of Biocontrol School of AgricultureSun Yat-sen UniversityShenzhen 518107China State Key Laboratory of plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyInnovation Academy for Seed DesignChinese Academy of SciencesBeijing 100101China State Key Laboratory of plant Physiology and Biochemistry and National Maize improvement Center Department of Plant Genetics and BreedingChina Agricultural UniversityBeijing 100193China Shanghai Key Laboratory of plant Molecular Sciences College of Life SciencesShanghai Normal UniversityShanghai 200234China

plant genomes are so highly diverse that a substantial proportion of genomic sequences are not shared among *** variable DNA sequences,along with the conserved core sequences,compose the more sophisticated pan-genome that represents the collection of all non-redundant DNA in a *** rapid progress in genome sequencing technologies,pan-genome research in plants is now *** we review recent advances in plant pan-genomics,including major driving forces of structural variations that constitute the variable sequences,methodological innovations for representing the pan-genome,and major successes in constructing plant *** also summarize recent efforts toward decoding the remaining dark matter in telomere-to-telomere or gapless plant *** new genome resources,which have remarkable advantages over numerous previously assembled less-than-perfect genomes,are expected to become new references for genetic studies and plant breeding.

关键词： plant pan-genome genome assembly structural variations graph genome T-2-T genome

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Investigating seed mineral composition in Korean landrace maize(Zea mays L.) and its kernel texture specificity

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Journal of Integrative Agriculture 2019年第9期18卷 1996-2005页

作者： Sooyeon Lim Gibum Yi department of plant Science Plant Genomics and Breeding Institute/Research Institute of Agriculture and Life Sciences Seoul National University

Mineral malnutrition affects billions of people all over the world and biofortification of staple crops provides a potential way to alleviate dietary mineral *** example,nutritional quality is an important breeding target for fresh waxy maize(Zea mays L.),which is widely consumed in Asian *** improvement of mineral composition will require comprehensive profiling of the mineral composition of maize varieties and an understanding of the capacity for maize grains to accumulate ***,using inductively coupled plasma absorption emission spectrometry,we quantified 12 minerals from the seeds of 47 maize varieties,including 25 Korean *** also compared the mineral contents in varieties with different seed starch profiles:waxy maize(which contains 100%amylopectin),dent maize(roughly 75%amylopectin and 25%amylose),and flint maize(similar to dent maize).The amounts of potassium,phosphorus,and sulfur were correlated with seed texture,waxy maize having higher amounts of phosphorus and potassium than dent maize and lower amounts of sulfur than flint maize or dent *** addition,a positive relationship was detected between the amount of phosphorus and that of potassium,magnesium,and *** results provide information on maize seed mineral composition and indicate that it could be affected by starch ***,the landraces that exhibit high mineral contents could be used as germplasm materials for breeding programs aimed at producing biofortified maize cultivars.

关键词： micronutrient macronutrient biofortification maize aleurone endosperm

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Genetic mapping of quantitative trait loci for the stigma exsertion rate in rice(Oryza sativa L.)

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Journal of Integrative Agriculture 2017年第7期16卷 1423-1431页

作者： Md Habibur Rahman ZHANG Ying-xin SUN Lian-ping ZHANG Ke-qin Md Sazzadur Rahman WU Wei-xun ZHAN Xiao-deng CAO Li-yong CHENG Shi-hua Key Laboratory for Zhejiang Super Rice research/National Center for Rice improvement/China National Rice research Institute Hangzhou 310006P.R.China department of Agricultural Extension Ministry of AgricultureDhaka 1215Bangladesh plant Physiology Division Bangladesh Rice Research InstituteGazipur 1701Bangladesh

The efficiency of hybrid rice seed production can be improved by increasing the percentage of exserted stigmas. To identify quantitative trait loci （QTLs） for this trait, we conducted QTL mapping using 75 chromosome segment substitution lines （CSSLs） developed from a cross between the donor parent, Xieqingzao B （XQZB）, a maintainer line which has high stigma exsertion and the recurrent parent, Zhonghui 9308 （ZH9308）, a restorer line which has low stigma exsertion. Atotal of nine QTLs （qSSE5, qSSE10, qSSE11, qDSE10, qDSE11, qTSE5, qTSE6, qTSE10, and qTSE11） for single stigma exsertion （ssE）, dual stigma exsertion （DSE） and total stigma exsertion （TSE） were assessed in two environments （Hainan and Zhejiang）. Six of these QTLs （qSSE10, qSSE11, qDSE10, qDSE11, qTSE10, and qTSE11） were found in both environ- ments, while one QTL （qTSE6） was found in only Hainan, and two QTLs （qSSE5 and qTSE5） were found in only Zhejiang. The qSSE10, qSSE11, qDSE10, qDSE11, qTSE6, qTSE10, and qTSE11 alleles, which are derived from the parent XQZB, exhibited a positive additive effect. In contrast, the qSSE5 and qTSE5 alleles, which are derived from the parent ZH9308, exhibited a negative additive effect. The SSE, DSE and TSE traits were significantly correlated with each other in an en- vironmentally dependent manner. These results indicated that the lines showing higher values for SSE were more likely to exhibit increased values for DSE, which would ultimately increase TSE. To evaluate the advantage of exserted stigmas for cross-pollination, single, dual and total stigma exsertion should be considered separately in future attempts at genetic improvement to achieve increased production of rice hybrid seeds. This study also provides information for fine mapping, gene cloning and particularly marker-assisted selection （MAS）, on the latter and with an emphasis the phenotypic effects and implications of the QTLs for practical use in hybrid rice breeding.

关键词： hybrid rice stigma exsertion rate QTL mapping

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Donors for Resistance to Brown planthopper Nilaparvata lugens(St?l) from Wild Rice Species

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Rice science 2016年第4期23卷 219-224页

作者： Preetinder S. SARAO Gurpreet K. SAHI Kumari NEELAM Gurjit S. MANGAT Bhaskar C. PATRA Kuldeep SINGH department of plant Breeding and Genetics Punjab Agricultural University Ludhiana Punjab 141004 India School of Agricultural Biotechnology Punjab Agricultural University Ludhiana Punjab 141004 India Crop improvement Division ICARNational Rice Research Institute Cuttack 753006 India

Out of 1 989 wild accessions sown in seed boxes for screening, only 1 003 wild accessions with good germination were screened against brown planthopper(BPH), Nilaparvata lugens(St?l) under greenhouse conditions. The collection comprised of accessions from 11 wild species and African cultivated rice. The germplasm was screened for BPH following standard seed box screening technique in the greenhouse. As many as 159 accessions were identified as resistant during the year 2012 based on one year screening. A selected set of BPH resistant accessions were screened again during 2013. Based on the two years screening, seven accessions of O. nivara(AA), one accession of O. officinalis(CC), seven accessions of O. australiensis(EE), five accessions of O. punctata(BB and BBCC) and nine accessions of O. latifolia(CCDD) were confirmed to be resistant to BPH. So far no BPH resistance genes have been identified and designated from O. nivara and O. punctata, hence these may act as new sources of resistance.

关键词： brown planthopper O. nivara O. officinalis O. australiensis O. punctata resistance rice

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Boosting seed Development as a New Strategy to Increase Cotton Fiber Yield and Quality

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Journal of Integrative plant Biology 2013年第7期55卷 572-575页

作者： Yong-Ling Ruan department of Biology School of Environmental and Life SciencesThe University of Newcastle Australia Australia-China Research Centre for Crop ImprovementThe University of Newcastle

Cotton （Gossypium spp.） is the most important textile crop worldwide due to its cellulosic mature fibers, which are single-celled hairs initiated from the cotton ovule epidermis at anthesis. research to improve cotton fiber yield and quality in recent years has been largely focused on identifying genes regulating fiber cell initiation, elonga- tion and cellulose synthesis. However, manipulating some of those candidate genes has yielded no effect or only a marginally positive effect on fiber yield or quality. On the other hand, evolutionary comparison and transgenic studies have clearly shown that cotton fiber growth is intimately controlled by seed development. Therefore,I propose that enhancing seed development could be a more effective and achievable strategy to increase fiber yield and quality.

关键词： Auxin cotton fiber seed development sugars seed maternal and filial tissues.

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A reactive oxygen species burst causes haploid induction in maize

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Molecular plant 2022年第6期15卷 943-955页

作者： Chenglin Jiang Ju Sun Rui Li Shijuan Yan Wei Chen Liang Guo Guochen Qin Pengcheng Wang Cheng Luo Wenjie Huang Qinghua Zhang Alisdair R.Fernie David Jackson Xiang Li Jianbing Yan National Key Laboratory of Crop Genetic improvement Huazhong Agricultural UniversityWuhan 430070China Guangdong Key Laboratory for Crop Germplasm Resources Preservation and Utilization Agro-biological Gene Research CenterGuangdong Academy of Agricultural SciencesGuangzhou 510640China Shanghai Center for plant Stress Biology CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032China department of Molecular Physiology Max-Planck-Institute of Molecular Plant PhysiologyAm Mühlenberg 114476 Potsdam-GolmGermany Cold Spring Harbor Laboratory Cold Spring HarborNY 11724USA State Key Laboratory of plant Genomics and National Center for plant Gene research Institute of Genetics and Developmental BiologyInnovation Academy for Seed DesignChinese Academy of SciencesBeijing 100101China Hubei Hongshan Laboratory Wuhan 430070China

Haploid induction (HI) is an important tool in crop breeding. Phospholipase A1 (ZmPLA1)/NOT LIKE DAD (NLD)/MATRILINEAL (MTL) is a key gene controlling HI in maize;however, the underlying molecular mechanism remains unclear. In this study, to dissect why loss of ZmPLA1 function could mediate HI we performed a comprehensive multiple omics analysis of zmpla1 mutant anthers by integrating transcriptome, metabolome, quantitative proteome, and protein modification data. Functional classes of significantly enriched or differentially abundant molecular entities were found to be associated with the oxidative stress response, suggesting that a reactive oxygen species (ROS) burst plays a critical role in HI. In support of this, we further discovered that a simple chemical treatment of pollen with ROS reagents could lead to HI. Moreover, we identified ZmPOD65, which encodes a sperm-specific peroxidase, as a new gene controlling HI. Taken together, our study revealed a likely mechanism of HI, discovered a new gene controlling HI, and created a new method for HI in maize, indicating the importance of ROS balance in maintaining normal reproduction and providing a potential route to accelerate crop breeding.

关键词： haploid induction single-cell sequencing maize ROS peroxidase

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