Effect of three elicitors (viz., chitosan, jasmonic acid and salicyclic acid) on different tissues (viz., leaf, stem, and root on Withanolide A contents in WS in open environment). *Total is the average of three tissues (leaf, stem and root); C10, C50, C100 = concentration of chitosan at 10 ppm, 50 ppm and 100 ppm; JA50, JA200, JA400 = concentration of jasmonic acid at 50 ppm, 200 ppm and 400 ppm; SA0.5, SA1.0, SA2.0 = concentration of SA at 0.5 ppm, 1 ppm and 2 ppm