Endogenous lipids of mango shoot and their significance in flowering.
Kumar A., Ram S., Pant R. C.
Author Affiliation: G.B. Pant University of Agriculture and Technology, Pantnagar 263?145, India.
: 503-510
Abstract : Eleven lipid-like substances (designated L1-L11) were isolated by extraction and thin layer chromatography from shoot tips and leaves of 26-year-old Dashehari mango trees. L1-L5 and L8-L10 showed growth-promoting activity in the radish cotyledon test. L5, L8, L9 and L10 were tentatively identified as steroid-like compounds. L8, which had the greatest growth-promoting activity, may be estradiol. The hormonal activity of the lipids extracted from 'on'- and 'off'-year shoots was estimated each month from Aug. 1980 to Feb. 1981 using the lettuce hypocotyl and radish cotyledon growth tests. Lipids extracted from 'on'-year shoots showed higher growth-promoting activity than those from 'off'-year shoots, in Sep.-Oct. and Jan.-Feb., periods corresponding to flower induction and panicle emergence, respectively.