甲基环丙烯对甘蔗苗期叶片抗氧化酶活性影响的初步研究

以苗期桶栽甘蔗桂糖37号为研究对象,设置正常供水和干旱胁迫环境下施用及不施用1-MCP的4个处理,测定苗期甘蔗叶片保护酶系统相关生理指标.结果表明,在水分正常供应情况下,施用1-MCP一次和二次处理,均能提高POD、SOD、CAT活性,其中POD和SOD活性明显提高,CAT活性变化不明显;干旱胁迫下,与正常供水相比,POD和SOD活性提高,CAT活性降低;同时缺水的甘蔗叶片经1-MCP一、二次处理,均能显著提高POD和SOD活性,而对CAT活性影响较小.施用1-MCP能提高甘蔗叶片抗氧化酶POD和SOD活性,有利于缓解干旱胁迫对植物细胞的伤害.

Preliminar study on the effect of 1-MCP on antioxidase activities of sugarcane leaves under water stress at seedling stage

1-MCP was applied to Guitang 37 in normal condition and under drought stress, with no application as the control. Bio-chemistry parameters on antioxidase activity of leaves at seedling period were compared. The results showed that activities of POD and SOD increased significantly after adding 1 mg?L-11-MCP in normal condition, while CAT activity increased slightly. When be-ing under drought tress without 1-MCP application, activities of POD and SOD increased, but CAT activity decreased. After twice application, activities of POD and SOD increased significantly but CAT activity varied slightly. Therefore, 1-MCP was able to pro-mote activities of POD and SOD in sugarcane at seedling period, easing cell damage of plant under drought stress.