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Signaling in Early maize kernel Development

Molecular Plant 2017年第3期10卷 375-388页

作者： Nicolas M. Doll Nathalie Depege-Fargei Peter M. Rogowsky Thomas Widiez Laboratoire Reproduction et D6veloppement des Plantes Univ Lyon ENS de Lyon UCB Lyon 1 CNRS INRA 69342 Lyon France

Developing the next plant generation within the seed requires the coordination of complex programs driving pattern formation, growth, and differentiation of the three main seed compartments： the embryo （future plant）, the endosperm （storage compartment）, representing the two filial tissues, and the surround- ing maternal tissues. This review focuses on the signaling pathways and molecular players involved in early maize kernel development. In the 2 weeks following pollination, functional tissues are shaped from single cells, readying the kernel for filling with storage compounds. Although the overall picture of the signaling pathways regulating embryo and endosperm development remains fragmentary, several types of molecu- lar actors, such as hormones, sugars, or peptides, have been shown to be involved in particular aspects of these developmental processes. These molecular actors are likely to be components of signaling pathways that lead to transcriptional programming mediated by transcriptional factors. Through the integrated action of these components, multiple types of information received by cells or tissues lead to the correct differentiation and patterning of kernel compartments. In this review, recent advances regarding the four types of molecular actors （hormones, sugars, peptides/receptors, and transcription factors） involved in early maize development are presented.

关键词： maize kernel seed development embryo endosperm signaling Zea mays

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Development of Three Risk Assessment Models for Deoxynivalenol and Fumonisins B1 ＋ B2 Contents in maize kernel

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Journal of Agricultural Science and Technology(B) 2011年第4期1卷 483-494页

作者： C. Levasseur O. Surel D. Kleiber Universite de Toulouse INPT Ecole d＇IngJnieurs de Purpan Laboratoire d＇Agro-Physiologie UPSP/DGER115 75 voie du TOECBP 57611 31076 Toulouse Cedex 03 France

The maximal deoxynivalenol （DON） and fumonisins 131 ＋ B2 （FUM） contents in cereals are dictated by the European regulation 1126/2007. The direct measurement of these mycotoxins is a tedious and expensive process. Our study is based on an alternative tool： near infrared spectroscopy. Different models were developed on 374 maize samples to predict their DON and FUM contents. Several parameters have been determined and used in a multivariate data analysis. Three models were developed：（1） a classification model based on Discriminant Factor Analysis （DFA）, （2） a linear model based on ANalysis of COVAriance （ANCOVA） and （3） a Partial Least Squares Discriminant Analysis model （PLS-DA）. Firstly, the performances of the DFA model for assessing DON and FUM risk were similar： 69 and 72% of the validation samples were respectively well classified. In the second part, the performances of the ANCOVA model for DON were higher than for FUM. The r2 was worth respectively 0.85 and 0.69. In the last part, the performances of the PLS-DA models were better for FUM than for DON. These results show that an evaluation of the mycotoxin risk is possible by analyzing selected kernel parameters measurable by secondary analytical such as near-infrared spectroscopy. Further work is needed to improve the models, adding more samples and using non linear approaches.

关键词： maize kernel mycotoxins contents (deoxynivalenol and fumonisins) risk assessment near infrared spectroscopy.

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An ARF24-ZmArf2 module influences kernel size in different maize haplotypes

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Journal of Integrative Plant Biology 2023年第7期65卷 1767-1781页

作者： Jie Gao Long Zhang Haonan Du Yongbin Dong Sihan Zhen Chen Wang Qilei Wang Jingyu Yang Paifeng Zhang Xu Zheng Yuling Li State Key Laboratory of Wheat and maize Crop Science Henan Maize Engineering Technology Joint CenterCollege of Agronomyand Center for Crop Genome EngineeringLongzi Lake CampusHenan Agricultural UniversityZhengzhou 450046China Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China

Members of the ADP-ribosylation factor family,which are GTP-binding proteins, are involved in metabolite transport, cell division, and *** there has been a significant amount of research on small GTP-binding proteins, their roles and functions in regulating maize kernel size remain elusive. Here, we identified Zm Arf2 as a maize ADPribosylation factor-like family member that is highly conserved during evolution. maize zmarf2 mutants showed a characteristic smaller kernel size. Conversely, ZmArf2 overexpression increased maize kernel size. Furthermore, heterologous expression of Zm Arf2 dramatically elevated Arabidopsis and yeast growth by promoting cell division. Using expression quantitative trait loci(e QTL) analysis, we determined that Zm Arf2 expression levels in various lines were mainly associated with variation at the gene locus. The promoters of Zm Arf2 genes could be divided into two types, p S and p L, that were significantly associated with both Zm Arf2 expression levels and kernel size. In yeast-one-hybrid screening, maize Auxin Response Factor 24(ARF24) is directly bound to the Zm Arf2 promoter region and negatively regulated Zm Arf2 ***, the p S and p L promoter types each contained an ARF24 binding element: an auxin response element(AuxRE) in p S and an auxin response region(Aux RR) in p L, respectively. ARF24binding affinity to Aux RR was much higher compared with Aux RE. Overall, our results establish that the small G-protein Zm Arf2 positively regulates maize kernel size and reveals the mechanism of its expression regulation.

关键词： ARF24 auxin response maize kernel ZmArf2

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Multi-omics analysis reveals the pivotal role of phytohormone homeostasis in regulating maize grain water content

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The Crop Journal 2024年第4期12卷 1081-1092页

作者： Yuanliang Liu Manman Li Jianju Liu Suining Deng Yan Zhang Yuanfeng Xia Baoshen Liu Mingliang Xu State Key Laboratory of Plant Environmental Resilience/College of Agronomy and Biotechnology/National maize Improvement Center/Center for Crop Functional Genomics and Molecular Breeding China Agricultural UniversityBeijing 100193China College of Agronomy/State Key Laboratory of Crop Biology Shandong Agricultural UniversityTai’an 271018ShandongChina Institute of Agricultural Biotechnology Jilin Academy of Agricultural SciencesGongzhuling 136100JilinChina maize Research Institute Jilin Academy of Agricultural SciencesGongzhuling 136100JilinChina

Grain water content(GWC)is a key determinant for mechanical harvesting of maize(Zea mays).In our previous research,we identified a quantitative trait locus,qGWC1,associated with GWC in ***,we examined near-isogenic lines(NILs)NILL and NILH that differed at the qGWC1 *** GWC in NILL was primarily attributed to reduced grain water weight(GWW)and smaller fresh grain size,rather than the accumulation of dry *** difference in GWC between the NILs became more pronounced approximately 35 d after pollination(DAP),arising from a faster dehydration rate in *** an integrated analysis of the transcriptome,proteome,and metabolome,coupled with an examination of hormones and their derivatives,we detected a marked decrease in JA,along with an increase in cytokinin,storage forms of IAA(IAA-Glu,IAA-ASP),and IAA precursor IPA in immature NILL *** kernel development,genes associated with sucrose synthases,starch biosynthesis,and zein production in NILL,exhibited an initial up-regulation followed by a gradual down-regulation,compared to those in *** discovery highlights the crucial role of phytohormone homeostasis and genes related to kernel development in balancing GWC and dry matter accumulation in maize kernels.

关键词： Grain water content maize kernel Phytohormone homeostasis

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Effect of Drought Stress on Proteome of maize Grain during Grain Filling

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Asian Agricultural Research 2021年第1期13卷 48-53页

作者： Chenglin ZOU Debo ZHENG Hua TAN Kaijian HUANG Aihua HUANG Xinxing WEI Runxiu MO Ruining ZHAI maize Research Institute Guangxi Academy of Agricultural Sciences Nanning 530007 China

Based on isobaric tags for relative and absolute quantification(iTRAQ)technology,the proteome of grains of a maize cultivar Huangzao 4 under drought stress at grain filling stage was *** results show that under drought stress,438 proteins were differentially expressed in the maize grains during grain *** them,200 were up-regulated and 238 were *** gene ontology(GO)analysis shows that the biological processes in which differential proteins are more involved are cellular processes,metabolic processes and single biological processes;proteins in the cell component category are mainly distributed in cells,cell parts and organelles;and the proteins the molecular function category mainly possess catalytic activity and binding *** expressed proteins classified by COG are mainly involved in protein post-translational modification and transport,molecular chaperones,general functional genes,translation,ribosomal structure,biosynthesis,energy production and transformation,carbohydrate transport and metabolism,amino acid transport and metabolism,*** subcellular structure of the differentially expressed proteins is mainly located in the cell chloroplast and *** proportions are 35.01%and 30.21%*** metabolic pathway enrichment analysis shows that the differentially expressed proteins are mostly involved in antibiotic biosynthesis,microbial metabolism in different environments,and endoplasmic reticulum protein processing;the metabolic pathways with higher enrichment are the carbon fixation pathway and estrogen signaling pathway of prokaryotes;and the higher enrichment and greater significance are in the tricarboxylic acid cycle,carbon fixation of photosynthetic organisms and *** results of this study preliminarily reveal the adaptive mechanism of maize grains in response to drought stress during grain filling,providing a theoretical reference for maize drought-resistant molecular breeding.

关键词： Isobaric tags for relative and absolute quantification Grain filling stage maize kernel Drought stress Proteomics

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