In the study of persistence of rhizobia, how does native rhizobia affect introduced rhizobia in th absence of host plant?
Two distinct group of rhizobia exist, the fast growing genus Rhizobium and the slow growing genus Bradyrhizobium. The rhizobium get energy in the form of carbohydrate provided by the plant. The habitat of the bacteria is the root surface and intracellular spaces of cortex cells. So, without host plants their survival depend on the carbon source available into the system. Therefore, in the absence of host plant everything depends on their compatibility and photosynthetic ability as well as energy source for their survival.
Native rhizobia have invariably lower mortality or survival chances than introduced rhizobia , regardless of absence or presence of host plant. But it is equally paramount to ensure optimum soil conditions required for harnessing maximum benefits either through introduced rhizobia or native ones...
Many thanks for your answer. I however, do not understand the first statement. There have been many reports indicating that native rhizobia are more persistent than introduced rhizobia due to their adaptation to the local environment. I should be happy if you can explain further why native rhizobia have low survival chance?
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