CIPC对贮藏期间马铃薯不同部位酶活性的影响

Effect of CIPC treatment on enzymes activities of stored potatoes sampled from different parts

以"费乌瑞它"为实验材料,研究常温贮藏条件下抑芽剂CIPC处理对马铃薯块茎不同部位淀粉磷酸化酶(Starch Phosphorylase,SP)和过氧化物酶(Peroxidase,POD)活性的影响,以探究CIPC的抑芽作用机理。结果表明,CIPC处理后的马铃薯顶芽部位的SP和POD活性均显著低于CK;侧芽部位因为"费乌瑞它"顶端优势的解除,酶活性略高于CK;非芽眼部位的酶活性接近CK。因此,CIPC主要作用在马铃薯芽眼部位,通过影响芽眼部位的内源代谢具有有效抑芽的作用。

The effects of CIPC treatment on starch phosphorylase（SP）and peroxidase（POD） enzyme activities of of Favorita were studied to clarify the mechanism of a sprout inhibitor CIPC action in stored potatoes,which were kept at room temperature and sampled from different parts of the tuber.The results showed that the enzyme activities of SP and POD in treated apical eye periderm discs were significantly lower compared with the control, and both enzyme activities were enhanced in treated lateral eyes due to the loss of apical dominance of Favorita and it showed no significant differences in other tissue of the tuber.Thus, the eyes of the tuber were more sensitive to CIPC than non-eye part.The main function of CIPC was on the eye parts of the potato.This might be regulated by affecting the endogenous metabolism.