The objective of the present study was to evaluate the effects of petroleum hydrocarbon contaminated soil on crop plants like, Cyamopsis tetragonoloba, Taub., Vigna radiata(L.) Wilczek. And Vigna mungo (L.) Hepper. The seedlings of Cyamopsis tetragonoloba, Taub., Vigna radiata (L.) Wilczek. And Vigna mungo (L.) Hepper were treated with various concentrations of petroleum (100µl, 200µl, 300µl, 400µl, 500µl) individually. After 15 days of treatment the plants were analysed. The morphometric characters such as seed germination, root length, shoot length, leaf area, fresh weight and dry weight were decreased with increasing the concentration of petroleum. In the present investigation, an attempt was also made to study the effect of microbiological biopreparation made from Rhodococcus treated petroleum and its impact on crop plant was recorded. The intent of the present study is to present an overview of hydrocarbon stress and alleviation of hydrocarbon stress by microbiological bio-preparation on crop plants growth
