| RT-PCR |
nodule initiation |
up-regulated |
N/A |
enod40, expressed in spontaneous nodules nodule-related organs developed in the absence of Rhizobium on certain alfalfa plants during nitrogen limitation. This indicates that enod40 expression is associated to the nodule developmental program independently of any infection process. Interestingly, an enod40 homolog was recently found in tobacco whose expression increases auxin tolerance of tobacco protoplasts. enod40 is involved in the initiation of root nodule organogenesis. enod40 expression induced dedifferentiation and division of cortical cells under nitrogen-limiting conditions. Our results suggest that this early nodulin gene is involved in the initiation of nodule development. (Charon et al., 1997) enod40, has a regulatory function in nodule initiation. enod40 is highly conserved among leguminous plants and it has also been identied in the non-legumes tobacco, rice and maize. In the legume roots, it is expressed in the early stages of the interaction, specically in the pericycle adjacent to the protoxylem pole and well before the initiation of cortical cell divisions that lead to nodule formation. Furthermore, it is induced by NFs and chitin pentamers and the phytohormone cytokinin. (Girard et al., 2003) ENOD40 was identified as a candidate for such a plant factor with a regulatory role during nodulation. ENOD40 Bright Yellow-2 (BY-2) tobacco cell suspensions. ENOD40 action can be counteracted by an ethylene perception blocker, indicating that ethylene is a negative regulator of elongation growth in 35S:NtENOD40 cells, and that the NtENOD40-induced response is mediated by alteration of ethylene biosynthesis kinetics. (Ruttink et al., 2006) |
11038563, 12930950, 12930950 |
PLNlncRbase
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