Abstract
Ultraviolet-B (UV-B) radiation negatively impacts on plant growth and development. Not all plants are UV sensitive: strong tolerance to UV-B radiation is particularly found among plants that naturally occur in areas of high UV-B radiation. There is limited knowledge about the mechanisms underlying such enhanced natural tolerance. In this study, we demonstrate strong differences in UV-B tolerance among Spirodela punctata ecotypes. Tolerance is visualized as sustained photosystem II (PSII) activity and biomass accumulation in fronds exposed to UV-B radiation. We find that the enhanced tolerance is constitutive and specific for UV-radiation stress, but it does not correlate with well-characterized UV-adaptation responses like the accumulation of bulk UV-screening pigments in the epidermis, or increased oxygen radical scavenging activity.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Photochemistry & Photobiology, B: Biology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
