Impact of plant growth regulators on okra seed quality and storability under ambient conditions

Preetilagna  Dhal; Sunil Kumar  Dash; Simanta  Mohanty; Pradyumna  Tripathy; Gouri Shankar Sahu; Anita Mohanty; Arabinda Dhal

doi:10.37855/jah.2023.v25i03.56

Preetilagna Dhal Department of Vegetable Science, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha.
Sunil Kumar Dash All India Coordinated Research Programme on Vegetable Crops, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha.
Simanta Mohanty Department of Seed Science and Technology, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha.
Pradyumna Tripathy Department of Vegetable Science, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha.
Gouri Shankar Sahu Department of Vegetable Science, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha.
Anita Mohanty All India Coordinated Research Programme on Vegetable Crops, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha.
Arabinda Dhal Department of Plant Pathology, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha.

DOI: https://doi.org/10.37855/jah.2023.v25i03.56

Keywords: Okra, seed quality, storability, plant growth regulators

Abstract

During kharif 2020 and 2021, an investigation was conducted to investigate the role of plant growth regulators as foliar spray on okra seed yield and quality. The experiment was laid out in RBD with three replications and eleven treatments. Foliar sprays were done at 15 and 30 DAS. Observations on various plant growth parameters, yield attributing characters, seed yield, seed storability and quality were recorded. Harvested seeds were stored in poly bags for a period of twelve months to study the storability of seeds. Results revealed that treatment with Cycocel 250 ppm recorded highest germination percentage (83.37%) followed by GA3 150 ppm (80.50%) whereas control plot recorded (73.00 %) of germination one year after storage. The rate of decrease in germination was (8.09%) with Cycocel (250 ppm) as compared to control (15.02%). The lowest increase in seed moisture content was recorded with Cycocel (250 ppm) ( 3.43%) followed by GA3 (150 ppm) as compared to control (4.98%). Up to twelve months of storage the progressive decline of Vigour Index -I and Vigour Index -II was demonstrated with Cycocel (250 ppm), GA3 (150 ppm) and NAA (200 ppm) with a decreased rate which expressed their potentiality as effective growth regulators . The electrical conductivity increased with a very decreased rate in Cycocel (250 ppm) (255.77%) followed by GA3 (150 ppm) (324.11%) and NAA (200 ppm) (384.31%) as compared to control ( 583.98%). Hence Cycocel (250 ppm) may be considered as best plant growth regulators increasing yield, seed quality and storability of okra.