Amelioration of Heavy-Metal Toxicity in Cauliflower by Application of Salicylic Acid

作者：Sinha Pratima^*; Shukla A K; Sharma Y K

来源：Communications in Soil Science and Plant Analysis, 2015, 46(10): 1309-1319.

DOI：10.1080/00103624.2015.1033543

• salicylic acid
• oxidative stress
• heavy-metal stress
• Antioxidants
• cauliflower (Brassica oleracea var. botrytis L.)

The important role of salicylic acid in response to different stresses is to modify and decrease the negative effects of stress. The objective of this study was to evaluate the amelioration of heavy-metal (HM) stress in cauliflower cv. Shubra by application of different concentrations of salicylic acid. In heavy-metal (cobalt, nickel, cadmium, chromium, and lead) stress, apart from appearance of visual symptoms, HM toxicity reduced dry weight and specific activity of catalase and increased the concentration of lipid peroxidation, proline, nonprotein thiol, electrolyte leakage percentage, and specific activity of peroxidase and superoxidase dismutase. Application of salicylic acid reverts back all parameters disturbed by HM stress. As opposed to other HMs, salicylic acid enhanced chromium toxicity effects in plants, showing synergism and the plants died. Application of salicylic acid (100mM) ameliorated toxic effects of HMs to some extent, showing antagonism in cauliflower.

• 出版日期2015-5-31