The JA-to-ABA signaling relay promotes lignin deposition for wound healing in Arabidopsis  

作　　者：Huimin Xu Chaoqun Dong Ying Wu Shasha Fu Arfa Tauqeer Xinyun Gu Qianfang Li Xufang Niu Peng Liu Xiaoyue Zhang Chuanyou Li Meng Li Shuang Wu 

机构地区：[1]College of Horticulture,Anhui Agricultural University,Hefei 230000,China [2]College of Life Sciences,College of Horticulture,Haixia Institute of Science and Technology,Fujian,Agriculture and Forestry University,Fuzhou 350002,China [3]College of Life Sciences,Shandong Agricultural University,Tai’an 271018,Shandong,China

出　　处：《Molecular Plant》2024年第10期1594-1605,共12页分子植物（英文版）

基　　金：supported bygrants from the National Natural ScienceFoundation of China(32400270 and 32425050).

摘　　要：Plants are frequently exposed to herbivory and mechanical damage that result in wounding.Two fundamental strategies,regeneration and healing,are employed by plants upon wounding.How plants make different decisions and how wound healing is sustained until the damaged tissues recover are not fully understood.In this study,we found that local auxin accumulation patterns,determined by wounding modes,may activate different recovery programs in wounded tissues.Wounding triggers transient jasmonic acid(JA)signaling that promotes lignin deposition in the first few hours after wounding occurs.This early response is subsequently relayed to ABA signaling via MYC2.The induced JA signaling promotes ABA biosynthesis to maintain the expression of RAP2.6,a key factor for sustained lignin biosynthesis and the later wound-healing process.Our findings provide mechanistic insights into how plants heal from wounding and clarify the molecular mechanisms that underlie the prolonged healing process following wounding.

关 键 词：wound healing lignin deposition JA signaling ABA signaling RAP2.6 

分 类 号：Q94[生物学—植物学]