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Effect of three Plant Growth Regulators on the Bulblets Development of Lycoris radiata

XIAO Yu-mian;SHE Lin-fang;CHANG Le;XIA Yi-ping;Department of Horticulture,College of Agriculture and Biotechnology,Zhejiang University;  
In order to study the effect of plant growth regulators on Lycoris bulblets development,the carbohydrate contents and relevant enzyme activities were assayed after spraying CPPU,chlorocholine chloride(CC) and salicylic acid(SA) with low and high concentrations,respectively,on leaves at the green period.The results showed that the three plant growth regulators could effectively stimulate growth and development of the bulblets.The most effective treatment was achieved after application of 5mg / L CPPU,and the carbohydrate contents and enzyme activities increased accordingly.It was indicated that the CPPU enlarged the bulblets by promoting bulb nutrient metabolism and accelerating the accumulation of starch.However,the CC and SA probably expanded the bulblets size in other physiological ways besides nutrients metabolism.At the same time,β-amylase was considered to play an important role in the starch metabolism of the bulblets.
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