Abstract
Accumulation of mangiferin (1,3,6,7-tetrahydroxyxanthone-C2-β-D-glucoside), a natural metabolite of Mangifera indica at the site of differentiating buds, influences the change from reproductive to vegetative growth. Mangiferin-induced physiological changes in M. indica have been studied and a link established between the metabolic deviations and the observed effects of mangiferin accumulation in healthy and malformed mango plants. Mangiferin in high concentration suppressed the activity of peroxidase, catalse, α-amylase and IAA-oxidase. Polyphenoloxidase and invertase showed increased activity. Mangiferin accumulation increased the rate of photosynthesis but lowered those of transpiration and respiration. Mangiferin treatment increased the contents of chlorophyll, carbohydrates, total nitrogen, protein nitrogen, nucleic acids (RNA and DNA) and indole-3yl-acetic acid (IAA).
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