Effects of drought stress and subsequent rewatering on photosynthetic and respiratory pathways in Nicotiana sylvestris wild type and the mitochondrial complex I-deficient CMSII mutant.

Journal of Experimental Botany
Alexander GalleMiquel Ribas-Carbo

Abstract

The interaction of photosynthesis and respiration has been studied in vivo under conditions of limited water supply and after consecutive rewatering. The role of the alternative (v(alt)) and cytochrome (v(cyt)) pathways on drought stress-induced suppression of photosynthesis and during photosynthetic recovery was examined in the Nicotiana sylvestris wild type (WT) and the complex I-deficient CMSII mutant. Although photosynthetic traits, including net photosynthesis (A(N)), stomatal (g(s)) and mesophyll conductances (g(m)), as well as respiration (v(cyt) and v(alt)) differed between well-watered CMSII and WT, similar reductions of A(N), g(s), and g(m) were observed during severe drought stress. However, total respiration (V(t)) remained slightly higher in CMSII due to the still increased v(cyt) (to match ATP demand). v(alt) and maximum carboxylation rates remained almost unaltered in both genotypes, while in CMSII, changes in photosynthetic light harvesting (i.e. Chl a/b ratio) were detected. In both genotypes, photosynthesis and respiration were restored after 2 d of rewatering, predominantly limited by a delayed stomatal response. Despite complex I dysfunction and hence altered redox balance, the CMSII mutant seems to be able ...Continue Reading

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Citations

Jul 25, 2013·International Journal of Molecular Sciences·Lea A I VaasHeinz-Martin Schumacher
Aug 13, 2014·Plant Science : an International Journal of Experimental Plant Biology·Jorge GagoHipolito Medrano
Mar 19, 2013·Plant Science : an International Journal of Experimental Plant Biology·Touhami RziguiPeter Streb
Jul 16, 2013·Plant Science : an International Journal of Experimental Plant Biology·Ling HaoZhaohu Li
Nov 12, 2016·Journal of Plant Physiology·R MonteroJ Bota
Oct 7, 2017·Physiologia Plantarum·Jesús Rodríguez-CalcerradaLuis Gil
Mar 29, 2018·Journal of Experimental Botany·Kapuganti Jagadis GuptaAbir U Igamberdiev
Aug 4, 2019·International Journal of Molecular Sciences·Kalaivani Nadarajah, Ilakiya Sharanee Kumar
Jun 23, 2011·Plant, Cell & Environment·Charles R WarrenF Javier Cano
Jul 25, 2021·Tree Physiology·Olivier Jean Leonce ManziClément Stahl
Apr 25, 2020·The Science of the Total Environment·Ran TongLina Jiang

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Methods Mentioned

BETA
gas-exchange
protein assay
electrophoresis

Software Mentioned

TotalLab

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