Abstract: Using Citrus unshiu cv. Guoqingsihao and C. sinensis as scions, the growth and some physiological and biochemical characters of rootstocks i.e. C. reticulate+Poncirus trifoliate, C. reticulate+C. jambhiri, C. sinensis×P. trifoliate, C. grandis×P. trifoliate, P. trifoliate, (the not grafted rootstock as control), for citrus were studied through two years potted experiment. The results were as follows:the trunk diameter of C. grandis×P. trifoliate and C. reticulate+C. jambhiri rootstocks would be easily influence by scions. There existed significant differences in root system volume between grafted rootstock and not grafted rootstock. The root activity and the activities of SOD and POD in roots of grafted rootstock were not greater than those of not grafted one. The scions improved the activity of CAT in roots of rootstock.

Key words: citrus, scion, rootstock, growth, root activity, anti-oxidant enzymes

摘要： 以体细胞杂种红桔+枳、红桔+粗柠檬和有性杂种Troyer枳橙、Swingle枳柚以及枳作砧木的"国庆4号"温州蜜柑、脐橙(无枳砧)和不嫁接的砧木幼树为试材,通过两年盆栽试验研究接穗对砧木生长、根系活力和根系抗氧化酶活性的影响。结果表明,Swingle枳柚和红桔+粗柠檬的砧粗易受接穗影响,接穗显著地影响砧木根系体积。在一般情况下,同一种砧木嫁接后砧木根系活力、超氧化物歧化酶(SOD)和过氧化物酶(POD)活性低于未嫁接砧木,或与其差异不显著;同时存在接穗促进根系过氧化氢酶(CAT)活性升高的现象。

关键词: 柑桔, 接穗, 砧木, 生长, 根系活力, 抗氧化酶系