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Genome-wide transcriptome analysis of roots in two rice varieties in response to alternate wetting and drying irrigation

作者：

Tao Song;Debatosh Das;Feng Yang;Moxian Chen;Yuan Tian;Chaolin Cheng;Chao Sun;Weifeng Xu;Jianhua Zhan

单位：

State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong, Chin;College of Horticulture, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China;Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen 518057, Guangdong, China;Department of Biology, Hong Kong Baptist University, Kowloon, Hong Kong, China; Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen 518057, Guangdong, China; Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Hunan Agricultural University, Changsha 410128, Hunan, China;Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China

关键词：

Transcriptome;Lignin;Phytohormone;Water-saving irrigation;Rice roo

摘要：

Alternate wetting and drying (AWD) irrigation has been widely used as an efficient rice production method to obtain better yield without continuous flooding (CF) of the paddy field. However, how this practice affects gene expression to regulate rice physiology and morphology is largely unknown. In this study, we used two rice varieties, Nipponbare, a lowland rice cultivar, and Gaoshan 1, an upland cultivar, and found that root dry weight (RDW) and root oxidation activity (ROA) in both cultivars substantially increased in response to AWD. We then analyzed the differences in transcriptome profiles of their roots irrigated in AWD vs. CF conditions. AWD responsive genes are mainly involved in lignin biosynthetic pathway and phytohormone signal transduction pathway and belong mainly to bHLH, bZIP, NAC, WRKY, and NSF transcription factor families. We discussed how these differentially expressed genes may contribute to the morphological adaptations observed in roots exposed to AWD. This analysis also provides useful information to explain the similarities and differences in adaptation to AWD irrigation between the two rice ecotypes. (C) 2020 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.

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Genome-wide transcriptome analysis of roots in two rice varieties in response to alternate wetting and drying irrigation

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