Cytokinin Induction of Root Nodule Primordia in Lotus japonicus Is Regulated by a Mechanism Operating in the Root Cortex
نویسندگان
چکیده
منابع مشابه
Proteome reference maps of the Lotus japonicus nodule and root.
Legume symbiosis with rhizobia results in the formation of a specialized organ, the root nodule, where atmospheric dinitrogen is reduced to ammonia. In Lotus japonicus (Lotus), several genes involved in nodule development or nodule function have been defined using biochemistry, genetic approaches, and high-throughput transcriptomics. We have employed proteomics to further understand nodule deve...
متن کاملPositive and negative regulation of cortical cell division during root nodule development in Lotus japonicus is accompanied by auxin response.
Nodulation is a form of de novo organogenesis that occurs mainly in legumes. During early nodule development, the host plant root is infected by rhizobia that induce dedifferentiation of some cortical cells, which then proliferate to form the symbiotic root nodule primordium. Two classic phytohormones, cytokinin and auxin, play essential roles in diverse aspects of cell proliferation and differ...
متن کاملPromoter trapping in Lotus japonicus reveals novel root and nodule GUS expression domains.
Agrobacterium-based transformation was used to introduce a promoter-less glucuronidase uidA gene (beta-glucuronidase; GUS) into Lotus japonicus. Transgenic plants were screened for GUS activation at different stages after inoculation with its symbiont, Mesorhizobium loti. Functional GUS fusion frequencies ranged from about 2 to 5% of the total number of transgenic lines. These lines provide exc...
متن کاملInvasion of Lotus japonicus root hairless 1 by Mesorhizobium loti involves the nodulation factor-dependent induction of root hairs.
In many legumes, including Lotus japonicus and Medicago truncatula, susceptible root hairs are the primary sites for the initial signal perception and physical contact between the host plant and the compatible nitrogen-fixing bacteria that leads to the initiation of root invasion and nodule organogenesis. However, diverse mechanisms of nodulation have been described in a variety of legume speci...
متن کاملA protein phosphatase 2C gene, LjNPP2C1, from Lotus japonicus induced during root nodule development.
Symbiotic interactions between legumes and compatible strains of rhizobia result in root nodule formation. This new plant organ provides the unique physiological environment required for symbiotic nitrogen fixation by the bacterial endosymbiont and assimilation of this nitrogen by the plant partner. We have isolated two related genes (LjNPP2C1 and LjPP2C2) from the model legume Lotus japonicus ...
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ژورنال
عنوان ژورنال: Molecular Plant-Microbe Interactions®
سال: 2011
ISSN: 0894-0282,1943-7706
DOI: 10.1094/mpmi-05-11-0142