Antioxidant content in two CAM bromeliad species as a response to seasonal light changes in a tropical dry deciduous forest

Journal of Plant Physiology
Claudia González-SalvatierraLuis Manuel Peña-Rodríguez

Abstract

Plants have evolved photoprotective mechanisms to limit photodamage; one of these mechanisms involves the biosynthesis of antioxidant metabolites to neutralize reactive oxygen species generated when plants are exposed to excess light. However, it is known that exposure of plants to conditions of extreme water stress and high light intensity results in their enhanced susceptibility to over-excitation of photosystem II and to photooxidative stress. In this investigation we used the 2,2-diphenyl-1-picrylhydrazyl reduction assay to conduct a broad survey of the effect of water availability and light exposure conditions on the antioxidant activity of the leaf extracts of two bromeliad species showing crassulacean acid metabolism. One of these was an epiphyte, Tillandsia brachycaulos, and the other a terrestrial species, Bromelia karatas. Both species were found growing wild in the tropical dry deciduous forest of Dzibilchaltún National Park, México. The microenvironment of T. brachycaulos and B. karatas experiences significant diurnal and seasonal light variations as well as changes in temperature and water availability. The results obtained showed that, for both bromeliads, increases in antioxidant activity occurred during the dry ...Continue Reading

References

Apr 2, 2005·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Mark MerzlyakSergei Pogosyan
May 23, 2006·Journal of Experimental Botany·Anja Krieger-Liszkay, Achim Trebst
Jan 3, 2008·International Journal of Biological Sciences·Hong-Bo ShaoCong-Min Kang
Sep 10, 2008·Photosynthesis Research·Anja Krieger-LiszkayAchim Trebst
Feb 24, 2009·Trends in Plant Science·Iker HernándezSergi Munné-Bosch

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Citations

Feb 1, 2011·Archives of Environmental Contamination and Toxicology·Gonzalo M A Bermudez, María Luisa Pignata
Dec 13, 2018·Frontiers in Plant Science·Sven BatkeChristiana Marie Evans-Fitz Gerald
Sep 25, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Tommaso StefaniMaría Del Rayo Camacho-Corona

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