Response of Off-season Growth Manipulation Through Varying Concentrations of Plant Hormone and Branch Bending on Qualitative Traits of Guava

Khan Jabroot, Deepika Saxena, Madhurima Chaudhuri, Rahul Rodge and Sargam Kumar

Abstract

Guava (Psidium guajava L.) from the Myrtaceae family whose pericarp is a rich source of various antioxidants has also emerged as an excellent processed product. Three flowering seasons mirg, ambe, and hasta are observed by the guava tree where hasta yields good-quality fruits but is not satisfactory enough to feed the population. Crop regulation techniques such as branch bending and plant growth regulators (PGR) like gibberellins (GA3), 1-naphthaleneacetic acid (NAA), and ethrel positively influence fruit biochemical attributes. Hence a trial was set up at Lovely Professional University, for the selection of desirable months from the off-season months viz., September, October, and November with varying concentrations of plant hormones specifically GA3, NAA, and ethrel with branch bending to amplify the quantitative traits in guava cv. Allahabad Safeda. Different biochemical characteristics were examined, including total soluble solids (TSS), total sugar, reducing and non-reducing sugars, ascorbic acid, totable acidity, and pectin content. Amongst the months under study, October gave favorable outcomes for all parameters with the highest mean values TSS (11.41 °Brix), total sugar (6.79%), reducing sugar (4.26%), non-reducing sugar (2.52%), ascorbic acid (149.75 mg/100 g pulp), titratable acidity (0.33%) and pectin (1.17%). Whereas combinations of GA3@200 ppm plus branch bending in October have maximized results in TSS (12.18 °Brix), total sugar (8.13%), reducing sugar (5.15%), non-reducing sugar (2.97%) while ascorbic acid (178.42%) and titrable acidity (0.25%) recorded its optimum performance with GA3@150 ppm plus October branch bending while NAA@200 ppm plus October branch bending had the best influence on pectin content (1.73%). GA3 influenced most biochemical traits except in pectin. Thus, these findings will benefit farmers in enhancing quantitative parameters by selecting an appropriate month and crop regulation measures from the off-season.

Published on: October 31, 2023
doi: 10.17756/jfcn.2023-s1-030
Citation: Jabroot K, Saxena D, Chaudhuri M, Rodge R. Kumar S. 2023. Response of Off-season Growth Manipulation Through Varying Concentrations of Plant Hormone and Branch Bending on Qualitative Traits of Guava. J Food Chem Nanotechnol 9(S1): S237-S242.

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