缺硼对棉花不同品种苗期叶片POD、SOD同工酶的影响

Influence of boron deficiency on POD and SOD isozymes in leaves of cotton cultivars at seedling stage

在土培条件下 ,研究了 4个对缺硼反应不同的棉花品种苗期叶片中过氧化物酶 (POD)和超氧化物歧化酶 (SOD)同工酶。结果表明 ,缺硼使硼低效品种POD、SOD同工酶数量增加 ,而硼高效品种变化不明显 ,并推测新出现的几种同工酶与适应缺硼环境关系密切。不同生长时期 ,叶片POD、SOD同工酶谱不同 ,可能与不同时期对缺硼的适应能力不同有关。

Four different cotton cultivars, which were proved to have different susceptibility to boron deficiency, were researched under soil culture condition The POD and SOD isozymes in cotton leaves were studied at their seedling stage both in boron deficient ( B,0 10mg B per kg soil) and boron sufficient (+B, 1 00mg B per kg soil) treatments It was found that B increased the number of POD and SOD isozymes in B ineffective varieties, but no change was found in B efficient varieties The increased isozymes must have good relationship with the capability of B deficient tolerance in different cotton cultivars, and differences were found between different growth stages (30 and 40 days) both in the two isozymes