生物
过氧化物酶体
水稻
发芽
脱落酸
分解代谢
水杨酸
植物
生物化学
酶
基因
作者
Yukang Wang,Gaochen Jin,Shuyan Song,Yijun Jin,Xiaowen Wang,Shuaiqi Yang,Xing‐Xing Shen,Yinbo Gan,Yuexing Wang,Ran Li,Jian‐Xiang Liu,Jianping Hu,Ronghui Pan
标识
DOI:10.1016/j.devcel.2024.03.023
摘要
The mechanism underlying the ability of rice to germinate underwater is a largely enigmatic but key research question highly relevant to rice cultivation. Moreover, although rice is known to accumulate salicylic acid (SA), SA biosynthesis is poorly defined, and its role in underwater germination is unknown. It is also unclear whether peroxisomes, organelles essential to oilseed germination and rice SA accumulation, play a role in rice germination. Here, we show that submerged imbibition of rice seeds induces SA accumulation to promote germination in submergence. Two submergence-induced peroxisomal Oryza sativa cinnamate:CoA ligases (OsCNLs) are required for this SA accumulation. SA exerts this germination-promoting function by inducing indole-acetic acid (IAA) catabolism through the IAA-amino acid conjugating enzyme GH3. The metabolic cascade we identified may potentially be adopted in agriculture to improve the underwater germination of submergence-intolerant rice varieties. SA pretreatment is also a promising strategy to improve submerged rice germination in the field.
科研通智能强力驱动
Strongly Powered by AbleSci AI