MITIGATION OF SALT STRESS IN TOMATO WITH SALICYLIC ACID AND JASMONIC ACID

Abstract

A study was conducted at the Horticulture Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from October 2016 to February 2017. The experiment consisted of two factors: Factor A (salinity level): S 0 = 0 dSm -1 , S 1 = 4 dSm -1 , S 2 II

= 7 dSm -1 , S 3 = 10 dSm ; Factor B (mitigation level): M 0 = 0, M 1 = 1 mM of Salicylic Acid, M 2 = 10 µm of Jasmonic Acid, M 3 = 1 mM of Salicylic Acid with 10 µm of Jasmonic acid. The experiment was laid out in Randomized Complete Block Design with 4 replications. Various morphological, yield and yield contributing characters varies due to increasing salinity and application of salicylic acid and Jasmonic acid singly or in combination have significantly mitigate this effect. In terms of salinity, the highest yield per hectare (81.04 t) was recorded from S 0 , while the lowest yield (17.40 t) was recorded from S 3 . In terms of mitigation levels, the highest yield per hectare (46.55 t) was found from M 3 , whereas the lowest yield (43.84 t) was recorded from M 0 . In combination, the highest yield per hectare (83.32 t) was recorded from S 0 M 3 , whereas the lowest yield (16.45 t) was recorded from S 3 M 0 . Therefore, combined application of salicylic acid with Jasmonic acid seems to mitigate salt stress in tomato.