Light Media Selection for Growing Micro-propagated Seedlings of Betula alnoides Effect of Arbuscular Mycorrhizal Fungi on Micropagated Taro (Colocasia esculenta Schott. ) Effect of Arbuscular Mycorrhizal Fungi on Micropagated Taro (Colocasia esculenta Schott. ) Growth-promoting effect of inoculating Klebsiella variicola DX120E on different sugarcane cultivars. A Study On the Introduction of Rare Endangered Tree Species in Tropics and southern Subtropics