ISSN:
1573-5028
Keywords:
host specificity
;
nodulation genes
;
Rhizobium trifolii
;
Sym plasmid
;
symbiotic nitrogen fixation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary The Rhizobium trifolii genes necessary for nodule induction and development have been isolated on a 14.0kb fragment of symbiotic (Sym) plasmid DNA. When cloned into a broad-host-range plasmid vector, these sequences confer a clover nodulation phenotype on a derivative of R. trifolii which has been cured of its endogenous Sym plasmid. Furthermore, these sequences encode both host specificity and nodulation functions since they confer the ability to recognize and nodulate clover plants on Agrobacterium and a fast-growing cowpea Rhizobium. This indicates that the bacterial genes essential for the initial, highly-specific interaction with plants are closely linked.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00023410
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