Impact of foliar application of salicylic acid on growth and lipid peroxidation in water stress tolerance of glycine max (l.) Merrill

Author(s): Meenakshi Mishra*, Veeru Prakash

Abstract

Salicylic acid (SA) is an important signal molecule modulating plant response to stress. An earthen pots trial was conducted to study the impact of salicylic acid (SA) @ 100, 200 and 400 ppm on growth and biochemical parameters of Glycine max (L.) merrill under waterlogging and drought stress. Shoot, root (length, dry weight), leaf area index, were significantly affected by water stress (waterlogging and drought stress), but SA suppressed these harmful effects. SA also increased RWC which was highly declined due to water stress. Chlorophyll and carotenoids content of stressful plants was destructively affected, but it was reorganized and increased along with increasing SA concentration. Nonetheless, the spray of SA on Glycine max seedlings (100, 200 and 400 ppm) resisted waterlogged and drought injuries by way of decrease of lipid peroxidation through reduce of MDA content. Overall, it can be concluded that SA could improve physiological and biochemical properties of Glycine max seedlings under water stress.

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