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ZmDRR206 functions in maintaining cell wall integrity during maize seedling growth and defense response to external stresses

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The Crop Journal 2023年第6期11卷 1649-1664页

作者： Tao Zhong Suining Deng Mang Zhu Xingming Fan Mingliang Xu jianrong ye National Maize Improvement Center/Center for Crop Functional Genomics and Molecular Breeding China Agricultural UniversityBeijing 100193China Institute Food Crops Yunnan Academy of Agricultural SciencesKunming 650205YunnanChina

Plants adaptively change their cell wall composition and structure during their growth,development,and interactions with environmental *** proteins(DIRs)contribute to environmental adaptations by dynamically reorganizing the cell wall and/or by generating defense compounds.A maize DIR,ZmDRR206,was previously reported to play a dominant role in regulation of storage nutrient accumulation in endosperm during maize kernel *** we show that ZmDRR206 mediates maize seedling growth and disease resistance by coordinately regulating biosynthesis of cell wall components for cell-wall integrity(CWI)*** of ZmDRR206 was induced in maize seedlings upon pathogen ***206 overexpression in maize resulted in reduced seedling growth and photosynthetic activity but increased disease resistance and drought tolerance,revealing a tradeoff between growth and ***,ZmDRR206 overexpression reduced the contents of primary metabolites and down-regulated genes involved in photosynthesis,while increasing the contents of major cell wall components,defense phytohormones,and defense metabolites,and up-regulated genes involved in defense and cell-wall biosynthesis in ***206-overexpressing seedlings were resistant to cell-wall stress imposed by isoxaben,and ZmDRR206 physically interacted with ZmCesA10,which is a cellulose synthase *** findings suggest a mechanism by which ZmDRR206 coordinately regulates biosynthesis of cell-wall components for CWI maintenance during maize seedling growth,and might be exploited for breeding strong disease resistance in maize.

关键词： Cell-wall integrity Cell-wall biosynthesis Dirigent protein ZmDRR206 Defense response Seedling growth

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The Auxin-Regulated Protein ZmAuxRPI Coordinates the Balance between Root Growth and Stalk Rot Disease Resistance in Maize

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Molecular Plant 2019年第3期12卷 360-373页

作者： jianrong ye Tao Zhong Dongfeng Zhang Chuanyu Ma Lina Wang Lishan Yao Qianqian Zhang Mang Zhu Mingliang Xu State Key Laboratory of Plant Physiology and Biochemistry/National Maize Improvement Center/College of Agronomy and Biotechnology/Center for Crop Functional Genomics and Molecular Breeding China Agricultural University2 West Yuanmingyuan RoadBeijing 100193P.R.China

To optimize fitness, plants must efficiently allocate their resources between growth and defense. Although phytohormone crosstalk has emerged as a major player in balancing growth and defense, the genetic basis by which plants man age this balance remai ns elusive. We previously ide ntified a quantitative disease . resistance locus, qRfg2, in maize (Zea mays) that protects against the fungal disease Gibberella stalk rot. Here, through map-based cloning, we demonstrate that the causal gene at qRfg2 is ZmAuxRPI, which encodes a plastid stroma-localized auxin-regulated protein. ZmAuxRPI responded quickly to pathogen challenge with a rapid yet transient reduction in expression that led to arrested root growth but enhanced resista nee to Gibberella stalk rot and Fusarium ear rot. ZmAuxRPI was show n to promote the biosynthesis of indole-3-acetic acid (IAA), while suppressing the formation of benzoxazinoid defense compounds. ZmAuxRPI presumably acts as a resource regulator modulating indole-3-glycerol phosphate and/or indole flux at the branch point between the IAA and benzoxazinoid biosynthetic pathways. The concerted interplay between IAA and benzoxazinoids can regulate the growth-defense balance in a timely and efficient manner to optimize plant fitness.

关键词： maize quantitative disease resistance Gibberella stalk rot Fusarium ear rot indole-3-acetic acid benzoxazinoids

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Inhibition of the spread of endophytic Sporisorium reilianum renders maize resistance to head smut

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The Crop Journal 2015年第2期3卷 87-95页

作者： Xianrong Zhao jianrong ye Lai Wei Nan Zhang Yuexian Xing Weiliang Zuo Qing Chao Guoqing Tan Mingliang Xu National Maize Improvement Center of China China Agricultural University Institute of Genetics and Developmental Biology Chinese Academy of Sciences Maize Research Institute Jilin Academy of Agricultural Sciences Institute of Botany Chinese Academy of Sciences

Head smut, caused by the fungal pathogen Sporisorium reilianum, poses a grave threat to maize(Zea mays) production worldwide. Here we report cytological and molecular evidence for maize resistance to head smut. During early stages of root infection, S. reilianum mycelium was capable of penetrating the root epidermis of both resistant(Ji1037) and susceptible(HZ4) inbred lines. S. reilianum hyphae were observed in the root–stem junction at 6 days after inoculation. In an attempt to monitor hyphal spread within the maize plant,a highly specific and sensitive real-time PCR method was established to estimate the hyphal content in infected maize tissues. During the upward growth of endophytic ***, the extent of hyphal spread was markedly different between Ji1037 and HZ4. Very little or no pathogen was detected in aerial parts of Ji1037, whereas large amounts of pathogen accumulated in aboveground tissues, particularly inflorescences, of HZ4. Thus,maize resistance to S. reilianum was achieved mainly by inhibition of endophytic hyphal growth rather than by prevention of early-root penetration by the pathogen.

关键词： Head smut Sporisorium reilianum Maize Resistance

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An Atypical Thioredoxin Imparts Early Resistance to Sugarcane Mosaic Virus in Maize

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Molecular Plant 2017年第3期10卷 483-497页

作者： Qingqing Liu Huanhuan Liu Yangqing Gong Yongfu Tao Lu Jiang Weiliang Zuo Qin Yang jianrong ye Jinsheng Lai Jianyu Wu Thomas Lubberstedt Mingliang Xu National Maize Improvement Centre of China China Agricultural University Beijing 100193 China Department of Agronomy Iowa State University Ames IA 50011 USA College of Agronomy Synergetic Innovation Center of Henan Grain Crops and National Key Laboratory of Wheat and Maize Crop ScienceHenan Agricultural University Zhengzhou 450002 China

Sugarcane mosaic virus （SCMV） causes substantial losses of grain yield and forage biomass in susceptible maize worldwide. A major quantitative trait locus, Scmvl, has been identified to impart strong resistance to SCMV at the early infection stage. Here, we demonstrate that ZmTrxh, encoding an atypical h-type thioredoxin, is the causal gene at Scmvl, and that its transcript abundance correlated strongly with maize resistance to SCMV. ZmTrxh alleles, whether they are resistant or susceptible, share the identical coding/proximal promoter regions, but vary in the upstream regulatory regions. ZmTrxh lacks two canon- ical cysteines in the thioredoxin active-site motif and exists uniquely in the maize genome. Because of this, ZmTrxh is unable to reduce disulfide bridges but possesses a strong molecular chaperone-like activity. ZmTrxh is dispersed in maize cytoplasm to suppress SCMV viral RNA accumulation. Moreover, ZmTrxh- mediated maize resistance to SCMV showed no obvious correlation with the salicylic acid- and jasmonic acid-related defense signaling pathways. Taken together, our results indicate that ZmTrxh exhibits a distinct defense profile in maize resistance to SCMV, differing from previously characterized dominant or recessive potyvirus resistance genes.

关键词： maize sugarcane mosaic virus quantitative resistance gene h-type thioredoxin

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ZmCCT,a CCT domain-containing transcription regulator,confers quantitative resistance to Gibberella stalk rot in maize

ZmCCT,a CCT domain-containing transcription regulator,confer...

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第一届全国玉米生物学学术研讨会

作者：王超 Qin Yang Yipu Li Yanling Guo jianrong ye Guangming Yin Mingliang Xu National Maize Improvement Center of China China Agricultural University

Gibberella stalk rot is a devastating soil-borne disease in maize,caused by the necrotrophic fungus Fusarium graminearum,and poses a grave threat to maize production and kernel quality *** resistance to Gibberella stalk rot is a typical quantitatively-inherited trait,predominantly conditioned by a major resistance QTL-qRfg1 on chromosome *** both high-resolution and association

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ZmTrxh,acting as a molecular chaperone,confers strong early resistance to sugarcane mosaic virus(SCMV)in maize

ZmTrxh,acting as a molecular chaperone,confers strong early ...

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第一届全国玉米生物学学术研讨会

作者：刘青青 Huanhuan Liu Yangqing Gong Yongfu Tao jianrong ye Thomas Lubberstedt Mingliang Xu National Maize Improvement Center of China China Agricultural University Department of Agronomy Iowa State University

Sugarcane mosaic virus(SCMV)causes the devastating maize viral disease and poses a grave threat to global maize *** loci,Scmvl and Scmv2,act epistatically to confer complete resistance to SCMV,among them,Scmv1 imparts strong early resistance to SCMV and Scmv2 mainly functions at late *** Scmvl locus has previously been restricted into a 59.21-kb region with joint fine-mapping in multiple *** of the annotated genes within the

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利用ANSYS模拟FRP加固RC梁中的收敛问题的对策

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工业建筑 2008年第Z1期38卷 204-208页

作者：刘清曾鹏叶建荣新疆大学建筑工程学院乌鲁木齐830008

利用大型有限元软件ANSYS可以对各种混凝土结构进行准确的模拟,从而可以减小试验工作量,节省开支。但是,如果有限元模拟建立不当,各种参数选项不合理,则会给计算带来收敛不了的问题。对这些问题进行归类分析,提出了解决方法。

关键词：有限元混凝土 ANSYS FRP

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中德两国废纸回收率差距分析及其对我国的启示

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科技创业月刊 2009年第2期22卷 80-81页

作者：叶健蓉湖北轻工职业技术学院湖北武汉430070

运用比较分析的方法,对德国废纸回收的措施、造纸工业与环境的和谐、公民环保意识的培养等方面进行了分析,总结出德国废纸回收率高的原因,以对我国的废纸回收管理及两型社会建立有所裨益。

关键词：废纸回收率差率分析公民环保意识

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基于云理论的居民负荷集体谐波概率分布

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电力系统自动化 2016年第3期40卷 39-45,151页

作者：汤波马世伟林顺富鲁月乔叶建荣陈光上海大学机电工程与自动化学院上海市200072 上海电力学院电气工程学院上海市200090

电力电子型居民负荷和新能源装置在配电网中应用越来越广泛,其产生的集体谐波非常可观,对电力系统的影响与危害已不可忽视。文中提出一种基于云理论的居民负荷集体谐波评估方法,介绍了云模型和云变换的基本理论,阐述了基于云理论的居民... 详细信息

电力电子型居民负荷和新能源装置在配电网中应用越来越广泛,其产生的集体谐波非常可观,对电力系统的影响与危害已不可忽视。文中提出一种基于云理论的居民负荷集体谐波评估方法,介绍了云模型和云变换的基本理论,阐述了基于云理论的居民负荷集体谐波评估流程。通过实际案例证明,采用云变换方法可精确拟合谐波电流概率分布曲线,能较好地呈现居民负荷谐波电流幅值分布曲线的多峰性,其95%概率最大值估计精度显著优于正态分布法。研究结果对分析居民谐波来源、确定谐波治理措施和监管政策具有重要意义。

关键词：云模型云变换集体谐波评估居民负荷谐波概率分布

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变电所消防灭火系统的设计

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云南电力技术 2009年第3期37卷 58-59页

作者：业建荣滇能集团云南消防器材供应公司云南昆明650011

介绍了独立变电所消防灭火系统的选型,设计和配置方法。

关键词：变电所灭火系统

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