低钾胁迫对不同钾营养效应型大豆保护酶系统的影响  

EFFECTS OF LOW POTASSIUM STRESS ON PROTECTIVE SYSTEMS OF DIFFERENT K-NUTRIENT EFFECTIVE SOYBEAN VARIETIES

作　　者：王伟[1] 曹敏建[1] 王晓光[1] 李植[1] 

机构地区：[1]沈阳农业大学农学系,沈阳110161

出　　处：《大豆科学》2005年第2期101-105,共5页Soybean Science

摘　　要：以四种钾营养效应型大豆品种(系)(铁丰31号、沈农6 号、铁95068-5、GD1617)为试验材料,设置两个钾浓度处理,研究低钾胁迫对大豆整个生育期细胞保护酶系统的影响。结果表明:在低钾胁迫下,超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的活性均有不同程度的升高。SOD的活性高峰出现时期最早,CAT次之,POD出现最晚。从敏感型来看,耐性系数高的不敏感型品种(系)CAT与POD的活性差异明显高于耐性系数低的敏感型品种(系),SOD活性差异则不甚显著。由此,本文认为大豆钾营养敏感型间的差异可以通过保护酶系统活性差异得以表现。The study deals with the effect of low potassium (K) stress on protective enzyme system with different supplementation of potassium concentration in four soybean varieties ('Tiefeng No.31', 'Shennong No.6', 'Tie 95068-5', 'GD1617') at the whole developmental stages in pods. The result shows that there is great difference in the four soybean varieties in the activity of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT). The controlled plants under low K exhibited an increasing of SOD 、POD and CAT activities in different degrees. The activity of SOD appears earlier than that of CAT and POD, but the difference of the activity of CAT and POD is more significant than that of SOD between the effective types. So the difference of potassium nutrient effective types can be expressed by the difference of the protective enzyme systems.

关 键 词：保护酶系统 低钾胁迫 营养效应 大豆 超氧化物歧化酶(SOD) 过氧化氢酶(CAT) 过氧化物酶(POD) 品种(系) 耐性系数 SOD活性 敏感型 沈农6号 试验材料 钾浓度 生育期 钾营养 

分 类 号：S565.1[农业科学—作物学]