Medicago truncatula ENOD40-1 and ENOD40-2 are both involved in nodule initiation and bacteroid development.
نویسندگان
چکیده
The establishment of a nitrogen-fixing root nodule on legumes requires the induction of mitotic activity of cortical cells leading to the formation of the nodule primordium and the infection process by which the bacteria enter this primordium. Several genes are up-regulated during these processes, among them ENOD40. Here it is shown, by using gene-specific knock-down of the two Medicago truncatula ENOD40 genes, that both genes are involved in nodule initiation. Further, during nodule development, both genes are essential for bacteroid development.
منابع مشابه
enod40 induces dedifferentiation and division of root cortical cells in legumes.
Under nitrogen-limiting conditions Rhizobium meliloti can establish symbiosis with Medicago plants to form nitrogen-fixing root nodules. Nodule organogenesis starts with the dedifferentiation and division of root cortical cells. In these cells the early nodulin gene enod40, which encodes an unusually small peptide (12 or 13 amino acids), is induced from the beginning of this process. Herein we ...
متن کاملEnod40, a short open reading frame-containing mRNA, induces cytoplasmic localization of a nuclear RNA binding protein in Medicago truncatula.
In eukaryotes, diverse mRNAs containing only short open reading frames (sORF-mRNAs) are induced at specific stages of development. Their mechanisms of action may involve the RNA itself and/or sORF-encoded oligopeptides. Enod40 genes code for highly structured plant sORF-mRNAs involved in root nodule organogenesis. A novel RNA binding protein interacting with the enod40 RNA, MtRBP1 (for Medicago...
متن کاملMedicago truncatula plants overexpressing the early nodulin gene enod40 exhibit accelerated mycorrhizal colonization and enhanced formation of arbuscules.
The mutualistic symbiosis between flowering plants and arbuscular mycorrhizal fungi is extremely abundant in terrestrial ecosystems. In this symbiosis, obligately biotrophic fungi colonize the root of the host plants, which can benefit from these fungi by enhanced access to mineral nutrients in the soil, especially phosphorus. One of the main goals of research on this symbiosis is to find plant...
متن کاملThe endosymbiosis-induced genes ENOD40 and CCS52a are involved in endoparasitic-nematode interactions in Medicago truncatula.
Plants associate with a wide range of mutualistic and parasitic biotrophic organisms. Here, we investigated whether beneficial plant symbionts and biotrophic pathogens induce distinct or overlapping regulatory pathways in Medicago truncatula. The symbiosis between Sinorhizobium meliloti and this plant results in the formation of nitrogen-fixing root nodules requiring the activation of specific ...
متن کاملRNAi knock-down of ENOD40s leads to significant suppression of nodule formation in Lotus japonicus.
ENOD40 is one of the most intriguing early nodulin genes that is known to be induced very early in response to interaction of legume plants with symbiotic Rhizobium bacteria, but its function in the nodulation process is still not known. Lotus japonicus has two ENOD40 genes: LjENOD40-1 is abundantly induced in very early stages of bacterial infection or Nod factor application, whereas LjENOD40-...
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ورودعنوان ژورنال:
- Journal of experimental botany
دوره 58 8 شماره
صفحات -
تاریخ انتشار 2007