Do mature shade leaves of tropical tree seedlings acclimate to high sunlight and UV radiation?

Functional Plant Biology : FPB
G Heinrich KrauseKlaus Winter

Abstract

Seedlings of neotropical forest trees grown in low light were exposed to 0.5-9 h d-1 direct sunlight, for up to 3 months, to test the capability of mature shade leaves to acclimate to full solar visible and UV radiation. Photosynthetic pigments and the antioxidant, ascorbate, were analysed in leaves of two pioneer and two late-succession species. Seedlings of one or two of these species were used to assess further acclimative responses. Sun-exposure for 0.5 or 1 h d-1 resulted in strongly decreased α-carotene and increased β-carotene and lutein levels. The pool size of xanthophyll-cycle pigments (sum of viola-, anthera- and zeaxanthin) was increased and their turnover was enhanced. These changes were associated with an increase in the capacity of non-photochemical fluorescence quenching and its 'energy-dependent' component, qE, and with reduced susceptibility to photoinhibition of PSII. Prolonged exposure to full direct sunlight (approximately 4 or 9 h d-1) resulted in a marked decrease of chlorophyll a + b content and increase in chlorophyll a / b ratios and the pool of xanthophyll-cycle pigments (based on chlorophyll), leading to extremely high zeaxanthin levels during high-light periods. Contents of ascorbate and UV-B-absorb...Continue Reading

References

Jul 21, 1999·Proceedings of the National Academy of Sciences of the United States of America·M Havaux, K K Niyogi
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Dec 1, 1989·Trends in Ecology & Evolution·M M CaldwellM Tevini
Mar 1, 1990·Photosynthesis Research·S S Thayer, O Björkman
Mar 1, 2001·Oecologia·Peter S SearlesMartyn M Caldwell
Jul 1, 2003·Functional Plant Biology : FPB·G Heinrich KrauseKlaus Winter

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Citations

Jan 22, 2013·Physiologia Plantarum·Paul W BarnesRonald J Ryel
Feb 28, 2019·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Janet F BornmanStephan D Flint
May 1, 2006·Functional Plant Biology : FPB·Susanne Schmidt, Dieter P Tracey
Mar 1, 2006·Functional Plant Biology : FPB·Albert Porcar-CastellPertti Hari
Oct 5, 2007·The Journal of Biological Chemistry·Luca Dall'OstoRoberto Bassi
Jan 23, 2008·Plant, Cell & Environment·Shizue MatsubaraKlaus Winter
Jan 17, 2009·Plant & Cell Physiology·Joonyul KimDean Dellapenna
Apr 28, 2009·The Plant Journal : for Cell and Molecular Biology·Ling BaiThomas P Brutnell
Apr 4, 2012·Plant & Cell Physiology·Ming-Zhu LvHong-Xuan Lin
Feb 24, 2006·Proceedings of the National Academy of Sciences of the United States of America·Joonyul Kim, Dean DellaPenna
Jan 1, 2009·Functional Plant Biology : FPB·Shizue MatsubaraKlaus Winter
Feb 16, 2021·Frontiers in Plant Science·Izhar MuhammadFeng Bai Li

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Methods Mentioned

BETA
AsA

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