摘要
在低温胁迫下,浓度为0.3 mmol/L的水杨酸显著提高了植株的根系活力;经浓度为0.3 mmol/L和0.6 mmol/L水杨酸处理后,降低了榕树幼株叶片的细胞膜相对透性及膜脂过氧化作用的最终产物丙二醛含量,且随着水杨酸浓度的增加都呈现出逐渐降低的趋势;水杨酸处理提高了榕树幼株的根系活力及超氧化物歧化酶、愈创木酚过氧化物酶、抗坏血酸过氧化物酶、过氧化氢酶的活性,且随着水杨酸浓度的增加都呈现出先升高后降低的趋势。
SA of different concentrations （0. 3 mol/L and 0. 6 mol/L ） reduced the membrane permeability and lipid peroxidation end products malondialdehyde content of Ficus microcorpa leaves and with the increase of the concentration of salicylic acid, malondialdehyde decreased gradually emerged. The salicylic acid increased the root activity, superoxide dismutase, guaiacol peroxidase, ascorbic acid peroxidase and catalase, and with the increase of salicylic acid content, malondialdehyde emerged as a trend first and then decreased. It indicated that salicylic acid could increase the cold tolerance of young Ficus rnicrocorpa plant, which was mainly achieved by means of enhancing the anti-oxidative enzyme activities, inhibiting the accumulation of reactive oxygen and decreasing the injury of membranes under cold stress. Thus it will further improve the young Ficus microcorpa plant under low temperature in winter cold resistance. The effect of salicylic acid（0. 3 mmoL/L）to decrease the injury under cold stress was better than that of salicylic acid（0. 6 mmol/L）.
出处
《林业科技》
2012年第2期1-4,共4页
Forestry Science & Technology
基金
长江大学博士启动基金
关键词
水杨酸(SA)
榕树
根系活力
细胞膜透性
活性氧代谢
Salicylic acid
Ficus microcorpa
Root activity
Membrane permeability
Metabolism of activity oxygen
