ISSN: 0972-1045

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

Journal of Applied Horticulture, 2023, 25(3): 313-318.

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

Preetilagna Dhal¹, Sunil Kumar Dash², Simanta Mohanty³, Pradyumna Tripathy¹, Gouri Shankar Sahu¹, Anita Mohanty² and Arabinda Dhal^4*

¹Department of Vegetable Science, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha. ²All India Coordinated Research Programme on Vegetable Crops, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha. ³Department of Seed Science and Technology, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha. ⁴Department of Plant Pathology, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha. Corresponding e-mail: arabindadhalouat@gmail.com

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

Key words: 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.