ความหลากหลายทางพันธุกรรมของ Rhizobium sp. ในถั่วมะแฮะ Cajanus cajan (L.) Mill sp.ในเขตอุทยานแห่งชาติทับลาน จังหวัดนครราชสีมา / สุจิณณา คุณรักษา = Genetic diversity of Rhizobium sp. in pigeon pea Cajanus cajan (L.) Mill sp. at Thab Lan National Park in Nakhon Ratchasima Province / Sujinna Khunraksa
Thirty-two soil Bradyrhizobium isolates from the forest-reviving at the royal suggestions and plant germplasm forest project in Tablan National Park, Nakhon Ratchasima province were shown to be of a slow-growing group. They also exhibited 9 patterns of antibiotic resistance when tested with seven different antibiotics. They possessed a single 600-megadalton plasmid. All Bradyrhizobium growth decreased with increasing level of salt. Nine isolates survived at 100 mM NaCl, with RC20 grew best. RC21 isolate showed highest nitrogen fixation effciency based on nitrogenase activity. The obtained genetic information will help characterize Bradyrhizobium host specificity for better and more efficient use in future reforestation projects