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How plants protect themselves from ultraviolet-B radiation stress
- Source :
- Plant Physiol
- Publication Year :
- 2021
-
Abstract
- Ultraviolet-B (UV-B) radiation has a wavelength range of 280–315 nm. Plants perceive UV-B as an environmental signal and a potential abiotic stress factor that affects development and acclimation. UV-B regulates photomorphogenesis including hypocotyl elongation inhibition, cotyledon expansion, and flavonoid accumulation, but high intensity UV-B can also harm plants by damaging DNA, triggering accumulation of reactive oxygen species, and impairing photosynthesis. Plants have evolved “sunscreen” flavonoids that accumulate under UV-B stress to prevent or limit damage. The UV-B receptor UV RESISTANCE LOCUS 8 (UVR8) plays a critical role in promoting flavonoid biosynthesis to enhance UV-B stress tolerance. Recent studies have clarified several UVR8-mediated and UVR8-independent pathways that regulate UV-B stress tolerance. Here, we review these additions to our understanding of the molecular pathways involved in UV-B stress tolerance, highlighting the important roles of ELONGATED HYPOCOTYL 5, BRI1-EMS-SUPPRESSOR1, MYB DOMAIN PROTEIN 13, MAP KINASE PHOSPHATASE 1, and ATM- and RAD3-RELATED. We also summarize the known interactions with visible light receptors and the contribution of melatonin to UV-B stress responses. Finally, we update a working model of the UV-B stress tolerance pathway.
- Subjects :
- UVR8
food.ingredient
Physiology
Ultraviolet Rays
Acclimatization
Arabidopsis
Plant Science
Models, Biological
food
Stress, Physiological
Genetics
MYB
chemistry.chemical_classification
Reactive oxygen species
Chemistry
Abiotic stress
Arabidopsis Proteins
fungi
food and beverages
Focus Issue on Architecture and Plasticity
Hypocotyl
Cell biology
Flavonoid biosynthesis
MAP kinase phosphatase
Photomorphogenesis
Cotyledon
Subjects
Details
- ISSN :
- 15322548
- Volume :
- 187
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Plant physiology
- Accession number :
- edsair.doi.dedup.....e0506ae3d8ff5bcb27cc27fc5091a193