Seasonal changes in hormonal content and its role in flowering of mango (Mangifera indica L.).
Jogdande N. D., Choudhari K. G., Dhemre J. K.
Author Affiliation: Mahatma Phule Krishi Vidyapeeth, Rahuri- 413 722, India.
Orissa Journal of Horticulture 28 : 49-52
Abstract : Naturally occurring growth promoters in the shoots of mango cultivars Alphonso (on- and off-year) and Neelum were studied in a field experiment carried out in Rahuri, Maharashtra, India during 1985-87. At the time of initiation of flush, the highest activity of auxin-like substances in Alphonso off-year shoots was observed at RF 0.3 (19.31) while Alphonso on-year shoots had highest activity at RF 0.7 (26.05). Neelum showed maximum activity at RF 0.8 (36.19) followed by that at RF 0.3 (10.91). The highest activity of gibberellin-like substances in Alphonso off- and on-year was observed at RF 0.7 (0.112) and 0.8 (0.133) while in Neelum, the highest activity was observed at the start of flush at RF 0.5 (0.081) and after 60 days at RF 0.4 (0.25) to 0.5 (0.046). At the time of initiation of flush, the highest activity of inhibitor-like substance in Alphonso (off- and on-year) was observed at RF 0.9 (42.00 and 22.50) to 1.0 (44.00 and 17.00) whereas in Neelum it was highest at RF 0.8 (40.50) to 1.0 (39.00). However, in Neelum, shoots sampled after 60 days had the highest activity at RF 0.9 (69.00).