AUTHOR=Liu Saifei , Jiang Jincheng , Ma Zihui , Xiao Muye , Yang Lan , Tian Binnian , Yu Yang , Bi Chaowei , Fang Anfei , Yang Yuheng
TITLE=The Role of Hydroxycinnamic Acid Amide Pathway in Plant Immunity
JOURNAL=Frontiers in Plant Science
VOLUME=13
YEAR=2022
URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2022.922119
DOI=10.3389/fpls.2022.922119
ISSN=1664-462X
ABSTRACT=
The compounds involved in the hydroxycinnamic acid amide (HCAA) pathway are an important class of metabolites in plants. Extensive studies have reported that a variety of plant hydroxycinnamamides exhibit pivotal roles in plant–pathogen interactions, such as p-coumaroylagmatine and ferulic acid. The aim of this review is to discuss the emerging findings on the functions of hydroxycinnamic acid amides (HCAAs) accumulation associated with plant defenses against plant pathologies, antimicrobial activity of HCAAs, and the mechanism of HCAAs involved in plant immune responses (such as reactive oxygen species (ROS), cell wall response, plant defense hormones, and stomatal immunity). However, these advances have also revealed the complexity of HCAAs participation in plant defense reactions, and many mysteries remain to be revealed. This review provides an overview of the mechanistic and conceptual insights obtained so far and highlights areas for future exploration of phytochemical defense metabolites.