Author(s):

MP Mandal, Mamta Kumari, SS Mandal, SK Mandal and NK Sinha

Abstract: Allelopathic effect of leaves extract of Ashwagandha were examined on seed germination and seedling growth of four (Pusa Gold, GW 2008-156, HP-1731 &amp; HD-2824) wheat varieties. The aqueous leaf extracts reduced per cent seed germination and seedling growth of wheat. On the basis of value of per cent reduction in seed germination and germination Relative Index (GRI), the inhibitory effect of different leaf extract was maximum in susceptible varieties (HP-1731 and HD-2824) followed by tolerant varieties (Pusa Gold and GW 2008-156). The shoot and root length and shoot and root dry weight declined as the concentration of the leaf extracts of Ashwagandha increased. Leaf extract of <em>Withania somnifera</em> showed inhibitory effect on sugar and protein and stimulatory effect on total amino acid content of wheat seedlings. The results indicated that the allelopathic effect of leaf extract <em>Withania somnifera</em> on tolerant varieties of wheat was maximum in terms of all physiological and biochemical parameters.

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