Presence of Arbuscular mycorrhizal fungi in the rhizosphere soil was investigated in different medicinal plants growing in calcareous soil conditions. Different medicinal plant species Gynandropsis pantaphylla L, Achyranthes aspera L., Cleome viscose L., Cassia obtuse Roxb., Catharanthus roseus L., Aristolochia indica  L., Sphaeranthus indicus L., Spermacoce hispida L. Gymnema sylvestre R.BR. and Sesamum indicum L. were studied. The present study was carried out to study the interaction of different medicinal plants with AM fungi by spore population and root colonization. Huge variation was observed in the spore population and root colonization in spite of their growth in calcareous soil conditions. A great variation was observed in the bacterial and fungal population also.

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