An Integrative Analysis of the Transcriptome and Proteome of Rice Grain Chalkiness Formation Under High Temperature
文献类型: 外文期刊
作者: Shaolu Zhao;Ruijie Cao;Linhe Sun;Dongying Zhuang;Min Zhong;Fengli Zhao;Guiai Jiao;Pengfei Chen;Xinwei Li;Yingqing Duan;Xiaoxue Li;Shaoqing Tang;Shen Ni;Peisong Hu;Xiangjin Wei
作者机构:
关键词: high temperature;proteome;rice quality;starch biosynthesis;transcriptome
期刊名称: Plants
ISSN: 2223-7747
年卷期: 2024 年 13 卷 23 期
页码:
收录情况: SCIE(2024版)
摘要: Exposure to high temperatures can impair the grain-filling process in rice (Oryza sativa L.), potentially leading to the formation of chalky endosperm, but the molecular regulation mechanism remains largely elusive. Here, we reported that high-temperature (HT) stress (day/night, 35 °C/30 °C) reduces both the grain-filling rate and grain weight of Ningjing 1 variety compared to normal temperatures (NT, day/night, 28 °C/23 °C). Grains under HT stress exhibited an opaque, milky-white appearance, alongside significant alterations in starch physicochemical properties. An integrated transcriptomic analysis of grains under HT revealed up-regulation of genes related to defense mechanisms and oxidoreductase activity, while genes involved in sucrose and starch synthesis were down-regulated, and α-amylase genes were up-regulated. Proteomic analysis of grains under HT echoed this pattern. These results demonstrate that high temperature during the grain-filling stage significantly increases rice chalkiness by down-regulating genes related to sucrose and starch synthesis, while up-regulating those involved in starch degradation.
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