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Biochemistry (Moscow)

, Volume 74, Issue 8, pp 903–909 | Cite as

Drought-induced changes in photosynthetic membranes of two wheat (Triticum aestivum L.) cultivars

  • I. M. Huseynova
  • S. Y. Suleymanov
  • S. M. Rustamova
  • J. A. Aliyev
Article

Abstract

Two wheat (Triticum aestivum L.) cultivars contrasting in architectonics and differing in drought resistance, Azamatli-95 (short stature, vertically oriented small leaves, drought-tolerant) and Giymatli-2/17 (short stature, broad and drooping leaves, drought-sensitive), were studied. It was found that the content of CP I (115 kDa) and 63-kDa apoprotein P700 and also LHC II polypeptides increases slightly in the drought-resistant cv. Azamatli-95 under extreme water supply limitation, while their content decreases in drought-sensitive cv. Giymatli-2/17. The intensity of synthesis of α- and β-subunits of CF1 (55 and 53.5 kDa) and 33–30.5 kDa proteins also decreases in the sensitive genotype. The intensity of short wavelength peaks at 687 and 695 nm sharply increases in the fluorescence spectra (77K) of chloroplasts from Giymatli-2/17 under water deficiency, and there is a stimulation of the ratio of fluorescence band intensity F687/F740. After exposure to drought, cv. Giymatli-2/17 shows a larger reduction in the actual PS II photochemical efficiency of chloroplasts than cv. Azamatli-95.

Key words

wheat genotypes photosynthetic membrane proteins fluorescence photosystems water stress 

Abbreviations

Chl

chlorophyll

CP 43 and CP 47

core antennas of PS II

DCPIP

2,6-dichlorophenol-indophenol

LHC

light-harvesting complex

LHC I(II)

light-harvesting complex of PS I(II)

LPO

lipid peroxidation

MV

methyl viologen

PS I(II)

photosystem I(II)

ROS

reactive oxygen species

RWC

relative water content

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Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • I. M. Huseynova
    • 1
  • S. Y. Suleymanov
    • 1
  • S. M. Rustamova
    • 1
  • J. A. Aliyev
    • 1
  1. 1.Institute of BotanyNational Academy of SciencesBakuAzerbaijan

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