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Photosynthetic characteristics and enzymatic antioxidant capacity of leaves from wheat cultivars exposed to drought.
Biochim Biophys Acta 2012; 1817(8):1516-23BB

Abstract

Two durum (Triticum durum L.), Barakatli-95 and Garagylchyg-2; and two bread (Triticum aestivum L.) wheat cultivars, Azamatli-95 and Giymatli-2/17 with different sensitivities to drought were grown in the field on a wide area under normal irrigation and severe water deficit. Drought caused a more pronounced inhibition in photosynthetic parameters in the more sensitive cvs Garagylchyg-2 and Giymatli-2/17 compared with the tolerant cvs Barakatli-95 and Azamatli-95. Upon dehydration, a decline in total chlorophyll and relative water content was evident in all cultivars, especially in later periods of ontogenesis. Potential quantum yield of PS II (F(v)/F(m) ratio) in cv Azamatli-95 was maximal during stalk emergency stage at the beginning of drought. This parameter increased in cv Garagylchyg-2, while in tolerant cultivar Barakatli-95 significant changes were not observed. Contrary to other wheat genotypes in Giymatli-2/17 drought caused a decrease in PS II quantum yield. Drought-tolerant cultivars showed a significant increase in CAT activity as compared to control plants. In durum wheat cultivars maximal activity of CAT was observed at the milk ripeness and in bread wheat cultivars at the end of flowering. APX activity also increased in drought-treated leaves: in tolerant wheat genotypes maximal activity occurred at the end of flowering, in sensitive ones at the end of ear formation. GR activity increased in the tolerant cultivars under drought stress at all stages of ontogenesis. SOD activity significantly decreased in sensitive cultivars and remained at the control level or increased in resistant ones. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial.

Authors+Show Affiliations

Azerbaijan National Academy of Sciences, Baku, Azerbaijan. huseynova-i@botany-az.org

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22417798

Citation

Huseynova, Irada M.. "Photosynthetic Characteristics and Enzymatic Antioxidant Capacity of Leaves From Wheat Cultivars Exposed to Drought." Biochimica Et Biophysica Acta, vol. 1817, no. 8, 2012, pp. 1516-23.
Huseynova IM. Photosynthetic characteristics and enzymatic antioxidant capacity of leaves from wheat cultivars exposed to drought. Biochim Biophys Acta. 2012;1817(8):1516-23.
Huseynova, I. M. (2012). Photosynthetic characteristics and enzymatic antioxidant capacity of leaves from wheat cultivars exposed to drought. Biochimica Et Biophysica Acta, 1817(8), pp. 1516-23. doi:10.1016/j.bbabio.2012.02.037.
Huseynova IM. Photosynthetic Characteristics and Enzymatic Antioxidant Capacity of Leaves From Wheat Cultivars Exposed to Drought. Biochim Biophys Acta. 2012;1817(8):1516-23. PubMed PMID: 22417798.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photosynthetic characteristics and enzymatic antioxidant capacity of leaves from wheat cultivars exposed to drought. A1 - Huseynova,Irada M, Y1 - 2012/03/07/ PY - 2011/11/11/received PY - 2012/02/28/revised PY - 2012/02/29/accepted PY - 2012/3/16/entrez PY - 2012/3/16/pubmed PY - 2013/3/9/medline SP - 1516 EP - 23 JF - Biochimica et biophysica acta JO - Biochim. Biophys. Acta VL - 1817 IS - 8 N2 - Two durum (Triticum durum L.), Barakatli-95 and Garagylchyg-2; and two bread (Triticum aestivum L.) wheat cultivars, Azamatli-95 and Giymatli-2/17 with different sensitivities to drought were grown in the field on a wide area under normal irrigation and severe water deficit. Drought caused a more pronounced inhibition in photosynthetic parameters in the more sensitive cvs Garagylchyg-2 and Giymatli-2/17 compared with the tolerant cvs Barakatli-95 and Azamatli-95. Upon dehydration, a decline in total chlorophyll and relative water content was evident in all cultivars, especially in later periods of ontogenesis. Potential quantum yield of PS II (F(v)/F(m) ratio) in cv Azamatli-95 was maximal during stalk emergency stage at the beginning of drought. This parameter increased in cv Garagylchyg-2, while in tolerant cultivar Barakatli-95 significant changes were not observed. Contrary to other wheat genotypes in Giymatli-2/17 drought caused a decrease in PS II quantum yield. Drought-tolerant cultivars showed a significant increase in CAT activity as compared to control plants. In durum wheat cultivars maximal activity of CAT was observed at the milk ripeness and in bread wheat cultivars at the end of flowering. APX activity also increased in drought-treated leaves: in tolerant wheat genotypes maximal activity occurred at the end of flowering, in sensitive ones at the end of ear formation. GR activity increased in the tolerant cultivars under drought stress at all stages of ontogenesis. SOD activity significantly decreased in sensitive cultivars and remained at the control level or increased in resistant ones. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial. SN - 0006-3002 UR - https://www.unboundmedicine.com/medline/citation/22417798/Photosynthetic_characteristics_and_enzymatic_antioxidant_capacity_of_leaves_from_wheat_cultivars_exposed_to_drought_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0005-2728(12)00073-4 DB - PRIME DP - Unbound Medicine ER -