e-ISSN 2231-8542
ISSN 1511-3701

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Effects of Gibberellic and Abscisic Acids on Germination and Seedling Growth of Okra (Abelmoschus esculentus L.) under Salt Stress

Fatima Yakoubi, Fatima Zohra Babou and Moulay Belkhodja

Pertanika Journal of Tropical Agricultural Science, Volume 42, Issue 2, May 2019

Keywords: ABA, GA3, germination, NaCl, okra, salinity

Published on: 30 May 2019

This study aimed to evaluate the effect of gibberellic acid (GA3) and abscisic acid (ABA) on the germination of okra seeds (Abelmoschus esculentus L.) exposed under salinity constraint. In the first part, seeds were germinated in hormonal solutions of GA3 (5 µM and 10 µM) and ABA (5 µM and 10 µM), in the presence of NaCl (100 mM). Results showed that NaCl reduced significantly the precocity of seeds germination without influencing its final rate; contrarily, it had a negative effect on hypocotylar growth, fresh weight and seedlings water content. The application of GA3 treatment attenuated the depressive effect of NaCl on germination by stimulating it from the first day of sowing (after 24 h) with 20% and 26.66% under the effect of 5 µM and 10 µM of GA3 respectively. The findings showed that, this phytohormone seemed positively influencing the hypocotylar length, fresh and dry weight as well as the water content of the okra seedlings. On the contrary, ABA was not effective in inducing tolerance to salinity.

ISSN 1511-3701

e-ISSN 2231-8542

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