Nodule Invasion and Symbiosome Differentiation During Rhizobium etli-Phaseolus vulgaris Symbiosis
نویسندگان
چکیده
منابع مشابه
Ectopic Expression of the Rhizobium etli amtB Gene Affects the Symbiosome Differentiation Process and Nodule Development
Under conditions of nitrogen limitation, soil bacteria of the genus Rhizobium are able to induce the development of symbiotic nodules on the roots of leguminous plants. During nodule organogenesis, bacteria are released endocytotically inside the invaded plant cells where they differentiate into their endosymbiotic form called bacteroids. Bacteroids surrounded by a plant-derived peribacteroid m...
متن کاملEffective symbiosis between Rhizobium etli and Phaseolus vulgaris requires the alarmone ppGpp.
The symbiotic interaction between Rhizobium etli and Phaseolus vulgaris, the common bean plant, ultimately results in the formation of nitrogen-fixing nodules. Many aspects of the intermediate and late stages of this interaction are still poorly understood. The R. etli relA gene was identified through a genome-wide screening for R. etli symbiotic mutants. RelA has a pivotal role in cellular phy...
متن کاملCharacterization of a Rhizobium etli chromosomal gene required for nodule development on Phaseolus vulgaris L.
A chromosomal gene, required for nodule development on Phaseolus bean, was characterized from Rhizobium etli strain TAL182. MLC640 is a Tn5 insertion mutant of TAL182 which shows decreased motility in soft TY agar and is defective in nodule development. The site of Tn5 insertion in MLC640 mapped to a 3.6-kb EcoRI chromosomal fragment. The 3.6-kb fragment was subcloned from the cosmid pUHR80 whi...
متن کاملVarying the abundance of O antigen in Rhizobium etli and its effect on symbiosis with Phaseolus vulgaris.
Judged by migration of its lipopolysaccharide (LPS) in gel electrophoresis, the O antigen of Rhizobium etli mutant strain CE166 was apparently of normal size. However, its LPS sugar composition and staining of the LPS bands after electrophoresis indicated that the proportion of its LPS molecules that possessed O antigen was only 40% of the wild-type value. Its LPS also differed from the wild ty...
متن کاملInhibition of Rhizobium etli Polysaccharide Mutants by Phaseolus vulgaris Root Compounds.
Crude bean root extracts of Phaseolus vulgaris were tested for inhibition of the growth of several polysaccharide mutants of Rhizobium etli biovar phaseoli CE3. Mutants deficient only in exopolysaccharide and some mutants deficient only in the O-antigen of the lipopolysaccharide were no more sensitive than the wild-type strain to the extracts, whereas mutants defective in both lipopolysaccharid...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Molecular Plant-Microbe Interactions®
سال: 2000
ISSN: 0894-0282,1943-7706
DOI: 10.1094/mpmi.2000.13.7.733