马铃薯试管苗茎叶过氧化物酶及根部脱氢酶活性分析

ANALYSIS OF PEROXOXIDASE AND DEHYDROGENASE IN POTATO PLANTLETS IN VITRO

以早熟品种“中薯２号”、中熟品种“克新３号”和中晚熟品种“金冠”为试验材料，进行了马铃薯试管苗茎叶过氧化物酶及根部脱氢酶活性分析．结果表明，品种间茎叶过氧化物酶及根部脱氢酶活性与品种熟性有关，早熟品种高于晚熟品种。试管苗徒长、叶片黄化及植株衰老，可使茎叶过氧化物酶活性增强。根部脱氢酶活性与试管苗生长势有关，根系发达，植株健壮，根部脱氨酶活性高。

Using Zhong-shu No2 (an carly mature vanety), Kc-xin No3 (a medium mature variety) and Jinguan (a late mature variety) as the experimental materials,we analyzed the achvity of peroxidase (POD)in leaves and stems of plantlets in vitro and the dehydrogecnase DDN) in root system.The results showed that the activity of POD and DDN were correlated with the maturity.The activity or POD and DDN in early mature varieties was higher than the late ones.The activity of POD was higher when the plantlets were weak and yellow stain or senesce.The activity of DDN was related to the growth vigor of plantlets. The DDN content in roots was higher when plantlets were healthy and had strong root system.