Abstract
Root nodule formation in the Rhizobium-legume symbiosis is the result of a series of plant-Rhizobium interactions, in which each induces gene expression in the other. One of the steps in this process is the release of rhizobia into the cytoplasm of host cells, whereafter the infected cells differentiate into non-dividing ones, which form the nodule tissue. Furthermore, the rhizobia differentiate into the characteristic bacteroid forms. During the formation of a root nodule several host genes are specifically induced. Immunological techniques have been used to detect the occurrence of nodule specific polypeptides, the so-called nodulins in soybean and pea root nodules (Legocki, Verma 1980; Bisseling et al., 1983). Leghemoglobins (Lbs) are of course an example of nodule specific proteins, but many more (about 25) nodulins have now been identified. These findings were confirmed by hybridization analysis of nodule mRNA, which indicated the presence of several nodule specific mRNA sequences (Auger et al., 1981).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.