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Integration of embryo-endosperm interaction into a holistic and dynamic picture of seed development using a rice mutant with notched-belly kernels

作者：

Tao, Yang;An, Lu;Xiao, Feng;Li, Ganghua;Ding, Yanfeng;Paul, Matthew J.;Liu, Zhenghui

单位：

Nanjing Agr Univ

关键词：

Seed development;Embryo-endosperm interaction;Developmental transition;Transcriptome;Sugar signaling;Rice physiology;STARCH SYNTHESIS;TRANSCRIPTOME LANDSCAPE;GRAIN-GROWTH;YIELD;GENE;SUPERIOR;INFERIOR;EMBRYOGENESIS;TEMPERATURES;EXPRESSION

摘要：

Interaction between the embryo and endosperm affects seed development, an essential process in yield formation in crops such as rice. Signals that mediate communication between embryo and endosperm are largely unknown. We used the notched-belly (NB) mutant with impaired communication between embryo and endosperm to investigate the effect of the embryo on developmental staging of the endo-sperm and signaling pathways in the embryo that regulate endosperm development. Hierachical cluster-ing of mRNA datasets from embryo and endosperm samples collected during development in NB and a wild type showed a delaying effect of the embryo on the developmental transition of the endosperm by extension of the middle stage. K-means clustering further identified coexpression modules of gene sets specific to embryo and endosperm development. Combined gene expression and biochemical anal-ysis showed that T6P-SnRK1, gibberellin and auxin signaling by the embryo regulate endosperm devel-opmental transition. We propose a new seed developmental staging system for rice and identify the most detailed signature of rice grain formation to date. These will direct genetic strategies for rice yield improvement. (c) 2021 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. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Integration of embryo–endosperm interaction into a holistic and dynamic picture of seed development using a rice mutant with notched-belly kernels [Yang Tao, Lu An, Feng Xiao, Ganghua Li, Yanfeng Ding, Matthew J. Paul, Zhenghui Li] 作物学报(英文版) 2022,10 (3)

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Integration of embryo-endosperm interaction into a holistic and dynamic picture of seed development using a rice mutant with notched-belly kernels

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