Reactive oxygen species are signaling molecules that modulate plant reproduction.
Plant Cell Environ
; 47(5): 1592-1605, 2024 May.
Article
in En
| MEDLINE
| ID: mdl-38282262
ABSTRACT
Reactive oxygen species (ROS) can serve as signaling molecules that are essential for plant growth and development but abiotic stress can lead to ROS increases to supraoptimal levels resulting in cellular damage. To ensure efficient ROS signaling, cells have machinery to locally synthesize ROS to initiate cellular responses and to scavenge ROS to prevent it from reaching damaging levels. This review summarizes experimental evidence revealing the role of ROS during multiple stages of plant reproduction. Localized ROS synthesis controls the formation of pollen grains, pollen-stigma interactions, pollen tube growth, ovule development, and fertilization. Plants utilize ROS-producing enzymes such as respiratory burst oxidase homologs and organelle metabolic pathways to generate ROS, while the presence of scavenging mechanisms, including synthesis of antioxidant proteins and small molecules, serves to prevent its escalation to harmful levels. In this review, we summarized the function of ROS and its synthesis and scavenging mechanisms in all reproductive stages from gametophyte development until completion of fertilization. Additionally, we further address the impact of elevated temperatures induced ROS on impairing these reproductive processes and of flavonol antioxidants in maintaining ROS homeostasis to minimize temperature stress to combat the impact of global climate change on agriculture.
Key words
Full text:
1
Database:
MEDLINE
Main subject:
Pollen
/
Reproduction
Language:
En
Journal:
Plant Cell Environ
/
Plant cell environ
/
Plant, cell and environment
Year:
2024
Type:
Article
Affiliation country:
United States