Effects of Na2CO3 and NaCl stresses on the antioxidant enzymes of chloroplasts and chlorophyll fluorescence parameters of leaves of Puccinellia tenuiflora (Turcz.) scribn.et Merr.

• Autorzy: Wang Y. , Sun G. , Suo B. , Chen G. , Wang J. , Yan Y.
• Języki publikacji: EN

Abstrakty

EN

Antioxidant enzymes in chloroplasts and chlorophyll fluorescence parameters of leaves of Puccinellia tenuiflora (Turcz.) scribn.et Merr. under isotonic Na2CO3 and NaCl stresses were studied. Ascorbate peroxidase (APX) and superoxide dismutase (SOD) activities showed a similar increasing trend and then decreased with the decreasing osmotic potential of culture solution, peaking at –4.74 x 10⁵ Pa under NaCl stress and at –3.40 x 10⁵ Pa under Na2CO3 stress. APX, glutathione transferase and SOD activities were higher under NaCl stress than those under Na2CO3 stress, and higher activities of antioxidant enzymes in chloroplasts were accompanied by lower MDA content under NaCl stress. Fv/Fm, Fv/Fo and Fv'/Fm' all initially increased and then decreased with the decreasing osmotic potential of culture solution, while ΦPSII, qNP and HDR showed a constant increase. Fv/Fm, Fv/Fo, ΦPSII and qNP under NaCl stress were also shown to be higher than those under Na2CO3 stress. The present study suggested that acidity played an important role in the hurt to Puccinellia tenuiflora seedlings, which was due to higher activities of antioxidant enzymes, qNP and ΦPSII, and the Na2CO3 resistance to Puccinellia tenuiflora was also supposed to be less than NaCl resistance in present work.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2008
• Tom: 30
• Numer: 2
• Opis fizyczny: p.143-150,fig.,ref.

Twórcy

autor

Wang Y.

• Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou, 225009 Jiangsu, China
• College of Biosciences and Biotechnology, Yangzhou University, 225009 Yangzhou, China

autor

Sun G.

• Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou, 225009 Jiangsu, China
• College of Biosciences and Biotechnology, Yangzhou University, 225009 Yangzhou, China

autor

Suo B.

• College of Agriculture and Biology, Shanghai Jiao Tong University, 201101 Shanghai, China

autor

Chen G.

• College of Biosciences and Biotechnology, Yangzhou University, 225009 Yangzhou, China

autor

Wang J.

• College of Biosciences and Biotechnology, Yangzhou University, 225009 Yangzhou, China

autor

Yan Y.

• College of Biosciences and Biotechnology, Yangzhou University, 225009 Yangzhou, China

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