Abstract
Plants are subjected to various environmental stresses throughout their life cycle. Reactive oxygen species (ROS) play important roles in maintaining normal plant growth, and improving their tolerance to stress. This review describes the production and removal of ROS in plants, summarizes recent progress in understanding the role of ROS during plant vegetative apical meristem development, organogenesis, and abiotic stress responses, and some novel findings in recent years are discussed. More importantly, interplay between ROS and epigenetic modifications in regulating gene expression is specifically discussed. To summarize, plants integrate ROS with genetic, epigenetic, hormones and external signals to promote development and environmental adaptation.
Highlights
It is well known that improving crop yield and productivity requires improved understanding of the coordinated growth of plant tissues and organs
Sources of Reactive oxygen species (ROS), mechanisms of production and removal, and key antioxidant molecules and enzymes that scavenge ROS have been reported in plants
The mismatch between oxidized miRNAs and proteins might be involved in the initiation of apoptosis, that eventually leads to the cell death (Wang et al, 2015; Dumont and Rivoal, 2019; Shekhova et al, 2019; Smirnoff and Arnaud, 2019)
Summary
It is well known that improving crop yield and productivity requires improved understanding of the coordinated growth of plant tissues and organs. ROS cause irreversible DNA damage and cell death, and function as important signaling molecules that regulate normal plant growth, and responses to stress. SA inhibits the expression of ROS scavenging-related genes, which increases ROS levels and promotes root meristem activity.
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