Amelioration of photo-assimilates translocation pattern by the application of phytohormones in Indian mustard under abiotic stress environment

Abstract

Detailed studies were carried out to find out the effect of various phytohormones on 14C translocation pattern in mustard under abiotic stress conditions. IAA100 μM enhanced 14C accumulation in siliquae 19.66%and 26.84% in waterlogged and high temperature stressed plants respectively in respect to control (3.67%) while, IAA500 and Kin50 reduced the accumulation in siliquae 1.41% and 1.46% in water logging (WL) environments and 2.30% in high temperature condition in compared to control 5.78% and 14.27%respectively in water logging and high temperature (HT) stress. All the concentrations of phytohormones significantly enhanced the translocation of photo assimilates in siliquae 6.5%, 22.31%, 13.85% and 6.29% respectively in plant sprayed with IAA 100, IAA 500, Kin 5 and Kin 50 uM in respect to control 2.67% under WL+HT stress, roots except Kin5 that decreased the accumulation in roots. After a revival period of ten days, the effect of all the hormonal concentrations was equivalent to water spray with regard to the 14C counts in siliquae of waterlogged plants. Further, in siliquae of high temperature stressed plants, IAA 100 was at par with water, while IAA500, Kin5 and Kin50 reduced the incorporation of 14C assimilates.