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primary root and root hair development regulation by OsAUX4 and its participation in the phosphate starvation response

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Journal of Integrative Plant Biology 2021年第8期63卷 1555-1567页

作者： Rigui Ye Yunrong Wu Zhenyu Gao Hao Chen Lixia Jia Dongming Li Xugang Li Qian Qian Yanhua Qi State Key Laboratory of Plant Physiology and Biochemistry College of Life SciencesZhejiang UniversityHangzhou310058 China Key Laboratory of Herbage&Endemic Crop Biology of Ministry of Education Inner Mongolia Key Laboratory of Herbage&Endemic Crop BiotechnologySchool of Life SciencesInner Mongolia UniversityHohhot010000 China State Key Laboratory of Rice Biology China National Rice Research InstituteChinese Academy of Agricultural SciencesHangzhou310006 China State Key Laboratory of Crop Biology College of Life SciencesShandongAgricultural UniversityTai'an271018 China Sino-German Joint Research Center on Agricultural Biology College of Life SciencesShandong Agricultural UniversityTai'an271018 China

Among the five members of AUX1/LAX genes coding for auxin carriers in rice,only OsAUX1 and OsAUX3 have been *** understand the function of the other AUX1/LAX genes,two independent alleles of osaux4 mutants,osaux4-1 and osaux4-2,were constructed using the CRISPR/Cas9 editing *** osaux4-1 or osaux4-2 exhibited shorter primary root(PR)and longer root hair(RH)compared to the wild-type Dongjin(WT/DJ),and lost response to indoleacetic acid(IAA)***4 is intensively expressed in roots and localized on the plasma membrane,suggesting that OsAUX4 might function in the regulation of root *** decreased meristem cell division activity and the downregulated expression of cell cycle genes in root apices of osaux4 mutants supported the hypothesis that OsAUX4 positively regulates PR ***4 is expressed in RH,and osaux4 mutants showing longer RH compared to WT/DJ implies that OsAUX4 negatively regulates RH ***,osaux4 mutants are insensitive to Pi starvation(-Pi)and OsAUX4 effects on the-Pi response is associated with altered expression levels of Pi starvation-regulated genes,and auxin distribution/*** study revealed that OsAUX4 not only regulates PR and RH development but also plays a regulatory role in crosstalk between auxin and-Pi signaling.

关键词： OsAUX4 phosphate starvation primary root root hair development rice

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Cell Cycle Kinetic Analysis in the Cortical Regions of the Lentil primary root During Germination

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Acta Botanica Sinica 2002年第7期44卷 764-770页

作者：喻富根庞延军赵剑春王强南京大学生命科学学院生物科学与技术系南京210093

Cell cycle kinetic activity in the cortical cells of the lentil (Lens culinaris Me-die. cv. Verte du Puy) primary root during germination was examined both temporally and spatially. Immunohistochemical and cytological evidence indicated that DNA replication and cell division started in the cortical cells of tire lentil primary root after around 13 and 17 h of imbibition, respectively. The first cells in DNA synthesis and the First mitotic figures all appeared in the cortical cells about I mm front the root-cap junction, but these divided cells had synthesized their DNA during the maturity of seed instead of during germination. The kinetic pattern of activity of the first cell cycle showed that these cells were not activated synchronously, but re-entered the cell cycle in turn depending on their places in the root tip, However, the adjacent cells partially synchronously proceeded their cell cycle.

关键词： cell cycle primary root germination immunohistochemistry Lens culinaris

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WAVY primary root 1,an AP2-EREBP transcription factor,regulates direction patterns of primary root in rice

WAVY PRIMARY ROOT 1,an AP2-EREBP transcription factor,regula...

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第十四届全国植物基因组学大会

作者： Wenqiang Li Gangfeng Wang Xiaoyong Wei Wenyan Li Kunming Chen State Key Laboratory of Crop Stress Biology in Arid Areas College of Agronomy and College of Life SciencesNorthwest A&F University

Plant root system is very important for both plant reproductive and survival in environmental *** roots are formed in the embryo and emerge from the seed during *** early growth and morphological pattern is crucial fo... 详细信息

关键词： rice primary root WPR1 AP2-EREBP

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Metabolic responses to combined water deficit and salt stress in maize primary roots

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Journal of Integrative Agriculture 2021年第1期20卷 109-119页

作者： LI Peng-cheng YANG Xiao-yi WANG Hou-miao PAN Ting YANG Ji-yuan WANG Yun-yun XU Yang YANG Ze-feng XU Chen-wu Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Agricultural CollegeYangzhou UniversityYangzhou 225009P.R.China Jiangsu Co-Innovation Center for Modern Production Technology o f Grain Crops Yangzhou UniversityYangzhou 225009P.R.China Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry o f Education/Yangzhou University Yangzhou 225009P.R.China

Soil water deficit and salt stress are major limiting factors of plant growth and agricultural productivity. The primary root is the first organ to perceive the stress signals for drought and salt stress. In this study, maize plant subjected to drought, salt and combined stresses displayed a significantly reduced primary root length relative to the control plants. GC-MS was used to determine changes in the metabolites of the primary root of maize in response to salt, drought and combined stresses. A total of 86 metabolites were measured, including 29 amino acids and amines, 21 organic acids, four fatty acids, six phosphoric acids, 10 sugars, 10 polyols, and six others. Among these, 53 metabolites with a significant change under different stresses were identified in the primary root, and the content of most metabolites showed down-accumulation. A total of four and 18 metabolites showed significant up-and down-accumulation to all three treatments, respectively. The levels of several compatible solutes, including sugars and polyols, were increased to help maintain the osmotic balance. The levels of metabolites involved in the TCA cycle, including citric acid, ketoglutaric acid, fumaric acid, and malic acid, were reduced in the primary root. The contents of metabolites in the shikimate pathway, such as quinic acid and shikimic acid, were significantly decreased. This study reveals the complex metabolic responses of the primary root to combined drought and salt stresses and extends our understanding of the mechanisms involved in root responses to abiotic tolerance in maize.

关键词： maize primary root combination stress drought high salt stress metabolomics

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The roles of microRNAs in regulating root formation and growth in plants

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Journal of Integrative Agriculture 2022年第4期21卷 901-916页

作者： YAN Xiao-xiao LIU Xiang-yang CUI Hong ZHAO Ming-qin College of Tobacco Science Henan Agricultural University/National Tobacco Cultivation and Physiology and Biochemistry Research Center/Key Laboratory for Tobacco Cultivation of Tobacco IndustryZhengzhou 450002P.R.China

MicroRNAs(miRNAs) are small(ca. 20-24 nucleotides) non-coding RNAs that have recently been recognized as key post-transcriptional modulators of gene expression;and they are involved in many biological processes in plants, such as root growth and development. The miRNAs regulate root elongation, lateral root(LR) formation and adventitious root(AR) development in response to hormone signaling, nutrient uptake and biotic/abiotic stress. This review provides multiple perspectives on the involvement of miRNAs in regulating root growth and development in plants. We also discuss several crucial mechanisms of miRNAs, their relationships with transcription factors and the target gene-mediated hormone signaling interactions in the regulation of root growth and development.

关键词： microRNAs adventitious root lateral root primary root

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The regulatory role of ethylene in rice genetic improvement under salt stress

The regulatory role of ethylene in rice genetic improvement ...

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2018全国植物生物学大会

作者： Hua Qin Juan Wang Xinbing Chen Rongfeng Huang Biotechnology Research Institute Chinese Academy of Agricultural Sciences

The primary root is critical for early seedling growth,and its development was regulated by multiple plant hormones and changing *** gaseous phytohormone ethylene is a key signaling molecule that regulates a variety of developmental processes and stress responses in *** order to investigate how ethylene regulates root growth and salt response in rice early seedlings,we screened a large population of rice fast neutron bombardment and ethylmethanesulfonate(EMS)-mutagenized lines,and several mutants were *** we describe two of these mutants that function in ethylene biosynthesis or ethylene signaling.A DOF transcription factor OsDOF15,which is salt suppressible,positively regulates primary root elongation and cell proliferation by modulates the expression of ethylene biosynthesis genes and ethylene *** regulation obviously affects saltinhibited primary root elongation in rice early seedlings,evidencing that OsDOF15 is a key regulator in salt-induced ethylene biosynthesis and root *** further unravel how ethylene signaling control root elongation and salt response,we then investigated the function of an auxin biosynthesis gene YUC8/REIN7,which is essential for ethylene-inhibited root elongation and salt *** and molecular studies reveal that YUC8/REIN7-mediated auxin biosynthesis directly functions downstream of ***,our findings reveal the regulation of ethylene in rice seedling primary root elongation and salt response.

关键词： ethylene salt auxin primary root rice

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