A plant flavone, luteolin, induces expression of Rhizobium meliloti nodulation genes

Science ◽  
1986 ◽  
Vol 233 (4767) ◽  
pp. 977-980 ◽  
Author(s):  
N. Peters ◽  
J. Frost ◽  
S. Long
Keyword(s):  
Rhizobium Meliloti ◽  
Nodulation Genes

scholarly journals Interference between Rhizobium meliloti and Rhizobium trifolii nodulation genes: genetic basis of R. meliloti dominance.

1988 ◽  
Vol 170 (12) ◽  
pp. 5718-5727 ◽  
Author(s):  
F Debellé ◽  
F Maillet ◽  
J Vasse ◽  
C Rosenberg ◽  
F de Billy ◽  
...  
Keyword(s):  
Genetic Basis ◽  
Rhizobium Meliloti ◽  
Rhizobium Trifolii ◽  
Nodulation Genes

Six nodulation genes of nod box locus 4 in Rhizobium meliloti are involved in nodulation signal production: nodM codes for d-glucosamine synthetase

1991 ◽  
Vol 228 (1-2) ◽  
pp. 113-124 ◽  
Author(s):  
Nedelcho Baev ◽  
Gabriella Endre ◽  
György Petrovics ◽  
Zsofia Banfalvi ◽  
Adam Kondorosi
Keyword(s):  
Rhizobium Meliloti ◽  
Nodulation Genes ◽  
Signal Production

scholarly journals Rhizobium meliloti nodulation genes allow Agrobacterium tumefaciens and Escherichia coli to form pseudonodules on alfalfa.

1984 ◽  
Vol 158 (3) ◽  
pp. 1133-1143 ◽  
Author(s):  
A M Hirsch ◽  
K J Wilson ◽  
J D Jones ◽  
M Bang ◽  
V V Walker ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Agrobacterium Tumefaciens ◽  
Rhizobium Meliloti ◽  
Nodulation Genes

Nodulation Genes and Their Regulation in Rhizobium Meliloti

1989 ◽  
pp. 145-151 ◽  
Author(s):  
Sharon R. Long ◽  
Julie Schwedock ◽  
Thomas Egelhoff ◽  
Melanie Yelton ◽  
John Mulligan ◽  
...  
Keyword(s):  
Rhizobium Meliloti ◽  
Nodulation Genes

Molecular genetic basis of Rhizobium–legume interactions

Genome ◽  
1989 ◽  
Vol 31 (1) ◽  
pp. 350-353 ◽  
Author(s):  
A. Kondorosi ◽  
E. Kondorosi ◽  
Z. Györgypal ◽  
Z. Banfalvi ◽  
J. Gyuris ◽  
...  
Keyword(s):  
Rhizobium Meliloti ◽  
Molecular Genetic ◽  
Nodule Development ◽  
Plant Host ◽  
Specific Expression ◽  
Nodulation Genes ◽  
Molecular Genetic Basis ◽  
Plant Signals ◽  
Nodulin Genes ◽  
Fix Genes

Recognition of the appropriate legume and nodule induction are controlled by common (nod) and host-specific nodulation (hsn) genes in Rhizobium. The nod and hsn genes are activated by the product of the regulatory nodD in conjunction with specific flavonoids excreted by the plant. Differences in the flavonoid specificity of the NodD proteins occur between different Rhizobium species, or between strains of a given species or even within one strain containing several copies of the nodD gene. Accordingly, the nodD gene controls the host-specific expression of nod and hsn genes. In addition, the nodulation genes are under not only positive but also negative regulation which is mediated by a nod-specific repressor protein. This dual control is required for optimal nodulation of the plant host. Further steps in nodule development are again controlled by the infecting Rhizobium. It was found that at least four different classes of Rhizobium fix genes are involved directly or indirectly in the expression of late nodulin genes, finally leading to the establishment of nitrogen-fixing symbiosis.Key words: Rhizobium meliloti, nodulation genes, plant signals, fix genes, alfalfa.

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