Diurnal adjustment in ultraviolet sunscreen protection is widespread among higher plants

Oecologia
Paul W BarnesRonald J Ryel

Abstract

The accumulation of ultraviolet (UV)-absorbing compounds (flavonoids and related phenylpropanoids) in the epidermis of higher plants reduces the penetration of solar UV radiation to underlying tissues and is a primary mechanism of acclimation to changing UV conditions resulting from ozone depletion and climate change. Previously we reported that several herbaceous plant species were capable of rapid, diurnal adjustments in epidermal UV transmittance (T UV), but how widespread this phenomenon is among plants has been unknown. In the present study, we tested the generality of this response by screening 37 species of various cultivated and wild plants growing in four locations spanning a gradient of ambient solar UV and climate (Hawaii, Utah, Idaho and Louisiana). Non-destructive measurements of adaxial T UV indicated that statistically significant midday decreases in T UV occurred in 49 % of the species tested, including both herbaceous and woody growth forms, and there was substantial interspecific variation in the magnitude of these changes. In general, plants in Louisiana exhibited larger diurnal changes in T UV than those in the other locations. Moreover, across all taxa, the magnitude of these changes was positively correlat...Continue Reading

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Citations

Jul 29, 2016·Frontiers in Plant Science·María B PascualFrancisco M Cánovas
Jan 27, 2017·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·UNKNOWN United Nations Environment Programme, Environmental Effects Assessment Panel
Jan 20, 2017·Plant, Cell & Environment·Carlos L Ballaré, Ronald Pierik
Feb 28, 2019·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Janet F BornmanStephan D Flint
Mar 23, 2019·Tree Physiology·Craig C BrelsfordT Matthew Robson
Mar 7, 2020·Frontiers in Plant Science·Saara Maria HartikainenThomas Matthew Robson
Apr 8, 2021·Plant Physiology·Neha RaiPedro José Aphalo
May 4, 2021·Functional Plant Biology : FPB·Dan WangJingyuan Li

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