Combined effect of salicylic acid and salinity on some antioxidant activities, oxidative stress and metabolite accumulation in Phaseolus vulgaris
Combined effect of salicylic acid and salinity on some antioxidant activities, oxidative stress and metabolite accumulation in Phaseolus vulgaris
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DOI：
10.1007/s10725-009-9380-1
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发表时间：
2009-04
影响因子：
4.2
通讯作者：
F. Palma;C. Lluch;Carmen Iribarne;J. García-Garrido;Noel A Tejera García
中科院分区：
文献类型：
--
作者：
F. Palma;C. Lluch;Carmen Iribarne;J. García-Garrido;Noel A Tejera García
水杨酸（SA）是诱导植物抗逆的内源信号分子。研究了水杨酸（SA）和氯化钠（NaCl）对菜豆（Phaseolus vulgaris，cv. F-15）进行了研究。结果表明，无论是SA或NaCl降低，地上部，根和总植物干重。SA处理降低了脯氨酸的含量，并减少了形式的抗坏血酸和谷胱甘肽，但可溶性糖（TSS），硫代巴比妥酸反应物质（TBARS）和氧化抗坏血酸的含量不受影响。另一方面，盐度显著降低了内源SA的水平，但增加了脯氨酸、可溶性糖、TBARS、抗坏血酸和谷胱甘肽的含量，以及测定的抗氧化酶活性水平，SA的施用提高了菜豆植株的干重，降低了有机溶质的含量，从而改善了菜豆对盐胁迫的反应（脯氨酸和TSS）和膜损伤（TBAR）。此外，SA在盐条件下的应用降低了抗氧化酶活性POX，APX和MDHAR的水平，这可能表明这些植物成功地适应了盐条件。
It has been shown that salicylic acid (SA) acts as an endogenous signal molecule responsible for inducing abiotic stress tolerance in plants. The effect of SA and sodium chloride (NaCl) on growth, metabolite accumulation, oxidative stress and enzymatic and non-enzymatic antioxidant responses on common bean plants (Phaseolus vulgaris, cv. F-15) was studied. Results revealed that either SA or NaCl decrease, shoot, root and total plant dry weights. SA treatments decreased the contents of proline, and reduced forms of ascorbate and glutathione, however, the content of soluble sugars (TSS), thiobarbituric acid-reactive substances (TBARs) and oxidized ascorbate remained unaffected. On the other hand, salinity significantly reduced the levels of endogenous SA but increased the content of proline, soluble sugars, TBARs, ascorbate and glutathione, as well as all increasing the levels of antioxidant enzyme activities assayed, except CAT. The application of SA improved the response of common bean plants to salinity by increasing plant dry weight and decreasing the content of organic solutes (proline and TSS) and damage to the membrane (TBARs). Moreover, SA application under saline conditions decreased the levels of antioxidant enzyme activities POX, APX and MDHAR which could indicate successful acclimatization of these plants to saline conditions.