Changes in floral buds of mango (Mangifera indica L.) treated with leaf extract of Ruellia tuberosa L.
Pandey D., Pandey S. N., Varade P. B.
Author Affiliation: Division of Fruits and Horticultural Technology, Indian Agricultural Research Institute, New Delhi - 110012, India.
Indian Journal of Plant Physiology 5 : 303-306
Abstract : Thirty-five-year-old mango cv. Dushehari trees were sprayed with 12 g/litre of methanol-extracted R. tuberosa leaf extract during the second week of October (at the time of flower bud differentiation) in a field experiment conducted in Delhi, India [date not given] to determine the physiological effects of the extract on the floral buds of mango. Flower buds of treated and control plants were sampled at the bud burst stage in February. Compared with control plants, those treated with leaf extracts showed reductions in total phenol content (51.66 vs. 65.09 mg/g), IAA oxidase activity (3.88 vs. 4.45 mmol IAA g-1 h-1), gibberellic acid (14.37 vs. 15.75 µg/g) and abscisic acid (23 vs. 37.95 µg/g) and increases in polyphenol oxidase [catechol oxidase] activity (0.66 vs. 0.35 ?A420 g-1 min-1) and IAA (254.96 vs. 226.14). Tabulated data on the chemical constituents of R. tuberosa leaves at the flowering stage are presented.