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Vol. 10, Issue 9 (2021)

Studies on influence of plant growth promoting hormone and chemicals on germination, growth and vigour of seedlings in custard apple (Annona squamosa L.) cv. Balanagar

Author(s):
Pravin, Dr. VNP Sivarama Krishna, Dr. G Thanuja Sivaram, Dr. M Jayaprada and Dr. Y Sireesha
Abstract:
The present investigation was conducted at Fruit Science block, Department of Fruit Science, College of Horticulture, Anantharajupeta, Dr. Y.S.R. Horticultural University, Andhra Pradesh during the year 2020-21. The experiment was laid out in completely randomized design for germination parameters and factorial concept for physiological parameters with two factors and three replications. Result of present investigation revealed that the custard apple seeds soaked in S2 (Thiourea @ 500ppm for 12hr) found significantly maximum number of leaves at 30 DAS, whereas S1 (GA3 @ 200 ppm for 12hr) was found better for germination viz. days taken for germination, percentage of germination, plant height and physiological parameters viz. rate of photosynthesis, rate of transpiration, stomatal conductance, leaf temperature, internal cellular CO2. Among the foliar spray of different growth substances, custard apple seedlings sprayed with F1 (GA3 @ 200ppm) was found better for rate of photosynthesis, rate of transpiration, stomatal conductance and F3 (19:19:19 @ 1%) was found better for leaf temperature, internal cellular CO2 at 45 and 60 DAS. Considering the interaction effect between seed treatment and foliar spray of chemical substances, found better for rate of photosynthesis, rate of transpiration, stomatal conductance in custard apple seedlings receiving treatment combination of S1F1 (GA3 @ 200 ppm for 12hr as a seed treatment and GA3 @ 200 ppm at 45 and 60 days after sowing as a foliar spray) and S1F3 (GA3 @ 200 ppm and 19:19:19 @ 1%) was found better for leaf temperature, internal cellular CO2.
Pages: 587-591  |  212 Views  65 Downloads


The Pharma Innovation Journal
How to cite this article:
Pravin, Dr. VNP Sivarama Krishna, Dr. G Thanuja Sivaram, Dr. M Jayaprada, Dr. Y Sireesha. Studies on influence of plant growth promoting hormone and chemicals on germination, growth and vigour of seedlings in custard apple (Annona squamosa L.) cv. Balanagar. Pharma Innovation 2021;10(9):587-591.
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