3 结果
Black spot is a major disease of field pea (Pisum sativum L.) production across southern Australia. Known causal agents in Australia include one or more of Mycosphaerella pinodes (Berk. & Bloxam) Vestergr., Phoma medicaginis var. pinodella (L.K. Jones), Ascochyta pisi Lib., or P. koolunga
Phage-resistant and -susceptible bacteria from nodules of alfalfa and sweet clover, grown at a site without a known history of cultivation, were identified as diverse genotypes of Ensifer, Rhizobium and Phyllobacterium species based on sequence analysis of ribosomal (16S and 23S rRNA) and
Rhizobium strain ANU 289 derepressed nitrogenase activity under defined in vitro conditions. Acetylene reduction was detected both in agar and liquid stationary culture. The strain is capable of nitrogen-fixing nodulation of legumes [such as siratro (Macroptilium atropurpureum Urb] as well as the