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Structural-functional state of thylakoid membranes of wheat genotypes under water stress.
Biochim Biophys Acta. 2007 Jun; 1767(6):869-75.BB

Abstract

Plants were grown in field conditions in the wide area under normal water supply and severe water deficit. Two wheat (Triticum aestivum L.) genotypes contrasting by architectonics and differing in drought-resistance were used: Giymatli-2/17, short stature, with broad and drooping leaves, drought-sensitive, and Azamatli-95, short stature, with vertically oriented small leaves, drought-tolerant). It was found out that Giymatli-2/17 was characterized by relatively low content of Chl a-protein of PS I (CP I) and beta-subunit of ATP-synthase complex, the high content of proteins in the 33-30.5 kDa region and LHC polypeptides (28-24.5 kDa), the intensive fluorescence at 740 nm and more high photochemical activity of PS II under normal irrigation compared with Azamatli-95. However, the content of CP I (M(r) 115 kDa) and apoprotein of P700 with M(r) 63 kDa insignificantly increases in the drought-resistant genotype Azamatli-95 under extreme water supply condition while their content decreases in drought-sensitive cv Giymatli-2/17. Intensity of synthesis alpha- and beta-subunits of CF(1) (55 and 53.5 kDa) also decreases in Giymatli-2/17. The levels of the core antenna polypeptides of FS II with M(r) 46 and 44.5 kDa (CP47 and CP43) remains stable both in normal, and stressful conditions. At the same time the significant reduction is observed in the content of polypeptides in the 33-30.5 kDa region in the more sensitive genotype Giymatli-2/17. There is an increase in the LHC II polypeptides level in tolerant genotype Azamatli-95 in contrast to Giymatli-2/17 (where the content of these subunits is observed decreasing). The intensity of short wavelength peaks at 687 and 695 nm sharply increases in the fluorescence spectra (77 K) of chloroplasts from sensitive genotype 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.

Authors+Show Affiliations

Institute of Botany, Azerbaijan National Academy of Sciences, Patamdar Shosse 40, Baku AZ 1073, Azerbaijan.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

17321491

Citation

Huseynova, Irada M., et al. "Structural-functional State of Thylakoid Membranes of Wheat Genotypes Under Water Stress." Biochimica Et Biophysica Acta, vol. 1767, no. 6, 2007, pp. 869-75.
Huseynova IM, Suleymanov SY, Aliyev JA. Structural-functional state of thylakoid membranes of wheat genotypes under water stress. Biochim Biophys Acta. 2007;1767(6):869-75.
Huseynova, I. M., Suleymanov, S. Y., & Aliyev, J. A. (2007). Structural-functional state of thylakoid membranes of wheat genotypes under water stress. Biochimica Et Biophysica Acta, 1767(6), 869-75.
Huseynova IM, Suleymanov SY, Aliyev JA. Structural-functional State of Thylakoid Membranes of Wheat Genotypes Under Water Stress. Biochim Biophys Acta. 2007;1767(6):869-75. PubMed PMID: 17321491.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Structural-functional state of thylakoid membranes of wheat genotypes under water stress. AU - Huseynova,Irada M, AU - Suleymanov,Saftar Y, AU - Aliyev,Jalal A, Y1 - 2007/01/28/ PY - 2006/10/09/received PY - 2006/12/21/revised PY - 2007/01/22/accepted PY - 2007/2/27/pubmed PY - 2007/8/11/medline PY - 2007/2/27/entrez SP - 869 EP - 75 JF - Biochimica et biophysica acta JO - Biochim. Biophys. Acta VL - 1767 IS - 6 N2 - Plants were grown in field conditions in the wide area under normal water supply and severe water deficit. Two wheat (Triticum aestivum L.) genotypes contrasting by architectonics and differing in drought-resistance were used: Giymatli-2/17, short stature, with broad and drooping leaves, drought-sensitive, and Azamatli-95, short stature, with vertically oriented small leaves, drought-tolerant). It was found out that Giymatli-2/17 was characterized by relatively low content of Chl a-protein of PS I (CP I) and beta-subunit of ATP-synthase complex, the high content of proteins in the 33-30.5 kDa region and LHC polypeptides (28-24.5 kDa), the intensive fluorescence at 740 nm and more high photochemical activity of PS II under normal irrigation compared with Azamatli-95. However, the content of CP I (M(r) 115 kDa) and apoprotein of P700 with M(r) 63 kDa insignificantly increases in the drought-resistant genotype Azamatli-95 under extreme water supply condition while their content decreases in drought-sensitive cv Giymatli-2/17. Intensity of synthesis alpha- and beta-subunits of CF(1) (55 and 53.5 kDa) also decreases in Giymatli-2/17. The levels of the core antenna polypeptides of FS II with M(r) 46 and 44.5 kDa (CP47 and CP43) remains stable both in normal, and stressful conditions. At the same time the significant reduction is observed in the content of polypeptides in the 33-30.5 kDa region in the more sensitive genotype Giymatli-2/17. There is an increase in the LHC II polypeptides level in tolerant genotype Azamatli-95 in contrast to Giymatli-2/17 (where the content of these subunits is observed decreasing). The intensity of short wavelength peaks at 687 and 695 nm sharply increases in the fluorescence spectra (77 K) of chloroplasts from sensitive genotype 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. SN - 0006-3002 UR - https://www.unboundmedicine.com/medline/citation/17321491/Structural_functional_state_of_thylakoid_membranes_of_wheat_genotypes_under_water_stress_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0005-2728(07)00018-7 DB - PRIME DP - Unbound Medicine ER -