An enhanced network of energy metabolism,lysine acetylation,and growth-promoting protein accumulation is associated with heterosis in elite hybrid rice  

作　　者：Xuan Ma Qingxiao Jia Sheng Li Zhengting Chen Xin Ming Yu Zhao Dao-Xiu Zhou 

机构地区：[1]National Key Laboratory of Crop Genetic Improvement,Hubei Hongshan Laboratory,Huazhong Agricultural University,Wuhan 430070,China [2]Institute of Plant Science Paris-Saclay(IPS2),CNRS,INRAE,University Paris-Saclay,91405 Orsay,France

出　　处：《Plant Communications》2023年第4期146-159,共14页植物通讯（英文）

基　　金：supported by grants fromtheNationalNatural Science Foundation of China(31730049);the National Key Research and Development Programof China(2016YFD0100802);the Huazhong Agricultural University Scientific&Technological Selfinnovation Foundation(2016RC003);the Fundamental Research Funds for the Central Universities(2662015PY228).

摘　　要：Heterosis refers to the superior performance of a hybrid compared with its parental lines.Although several genetic and molecular models have been proposed to explain heterosis,it remains unclear how hybrid cells integrate complementary gene expression or activity to drive heterotic growth.In this work,we show that accumulation of growth-promoting and energy metabolism proteins,enhanced energy metabolism activities,and increased protein lysine acetylation were associated with superior growth of the panicle meristem in the elite hybrid rice Shanyou 63 relative to its parental varieties.Metabolism of nuclear/cytosolic acetylcoenzyme A was also enhanced in the hybrid,which paralleled increases in histone H3 acetylation to selectively target the expression of growth-promoting and metabolic genes.Lysine acetylation of cellular proteins,including TARGET OF RAPAMYCIN complex 1,ribosomal proteins,and energy metabolism enzymes,was also augmented and/or remodeled to modulate their activities.The data indicate that an enhanced network of energy-producing metabolic activity and growth-promoting histone acetylation/gene expression in the hybrid could contribute to its superior growth rate and may constitute a model to explain heterosis.

关 键 词：HETEROSIS TORC1 r-protein lysine acetylation energy metabolism hybrid rice 

分 类 号：S511[农业科学—作物学]