Sex-related differences in photoinhibition, photo-oxidative stress and photoprotection in stinging nettle (Urtica dioica L.) exposed to drought and nutrient deficiency

Journal of Photochemistry and Photobiology. B, Biology
Bárbara SimancasSergi Munné-Bosch

Abstract

Dimorphic plant species can show distinct nutrient needs due to sex-related differences in nutrient allocation to reproductive structures, which can potentially affect their sensitivity to photoinhibition and photo-oxidative stress. Here, we investigated sex-related differences in the extent of photo-oxidative stress in male and female individuals of U. dioica exposed to a combination of severe drought and nutrient starvation. Male and female individuals of U. dioica subject to severe drought stress were exposed to various levels of nutrient availability. First, a set of plants grown under field conditions and exposed to summer drought was used to test the effects of nutrient supply (given as NPK fertilizer). Secondly, the effects of various phosphate concentrations in the nutrient solution were tested in drought-stressed potted plants. The Fv/Fm ratio (maximum efficiency of PSII photochemistry), photoprotection capacity (levels of carotenoids, including the xanthophyll cycle, and vitamins C and E), and the extent of lipid peroxidation (hydroperoxide levels) were measured. Results showed that an application of the NPK fertilizer to the soil had a positive effect on drought-stressed plants, reducing the extent of lipid peroxidat...Continue Reading

References

Jul 13, 2005·Journal of Plant Physiology·Sergi Munné-Bosch
Jun 16, 2010·Plant, Cell & Environment·Lianghua ChenChunyang Li
Dec 1, 2006·American Journal of Botany·Leah S Dudley
Nov 16, 2012·Plant Physiology·Sergi Munné-BoschChristine H Foyer
Nov 28, 2012·Journal of Experimental Botany·Spencer C H Barrett, Josh Hough
Jan 1, 2014·Journal of Experimental Botany·Marta JuvanySergi Munné-Bosch
Jul 15, 2015·Journal of Experimental Botany·Marta Juvany, Sergi Munné-Bosch

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