乙烯利对甘蔗分蘖期茎三种酶活性的影响及其与分蘖的关系

在分蘖前期喷施适宜浓度(100mg/L)乙烯利提高了蔗茎的过氧化物酶活性和IAA氧化酶的活性。用100mg/L乙烯利处理后,两个品种根部的过氧化物酶和IAA氧化酶活性明显高于上部的活性,并且比对照和400mg/L乙烯利处理的效果明显。乙烯利处理后新台糖16号上部节间的酸性转化酶活性始终高于下部节间的酶活性,其中100mg/L乙烯利处理下部节间的明显低于对照的;乙烯利处理后新台糖22号茎内的酸性转化酶活性也低于对照的,但与对照的差异相对比新台糖16号的小。

Effects of ethephon sprayed at early tillering stage on the activities of peroxidase, IAA oxidase and acid invertase in sugarcane in correlation to tillering

Foliar application of 100 mg/L ethephon at tillering stage increased the activities of IAA oxidase and peroxidase in sugarcane plant.It was obvious that the activities of IAA oxidase and peroxidase in top internodes were higher as compared with those in bottom internodes.The treatment with 100 mg/L ethephon was the most efficacious in all the treatments.For ROC16,after ethephon treatment,the acid invertase activity in the top internodes was higher than that in the bottom internodes from beginning to end,and the treatment with 100 mg/L ethephon recorded higher activity in the bottom internodes than that in the control.For ROC22,both the treatments with 100 mg/L and 400 mg/L ethephon recorded lower acid invertase activities in the bottom internodes than that in the control.