LIN, a Medicago truncatula Gene Required for Nodule Differentiation and Persistence of Rhizobial Infections

Description:

Article on LIN, a Medicago truncatula gene required for nodule differentiation and persistence of rhizobial infections.

Creator(s):
Creation Date: November 2004
Partner(s):
UNT College of Arts and Sciences
Collection(s):
UNT Scholarly Works
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Creator (Author):
Kuppusamy, Kavitha T.

University of Minnesota

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Endre, Gabriella

University of Minnesota

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Prabhu, Radhika

Texas A & M University

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Penmetsa, R. Varma

University of California Davis

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Veereshlingam, Harita

University of North Texas

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Cook, Douglas R.

University of California, Davis

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Dickstein, Rebecca

University of North Texas

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VandenBosch, Kathryn A.

University of Minnesota

Publisher Info:
Place of Publication: [Rockville, Maryland]
Date(s):
  • Creation: November 2004
Description:

Article on LIN, a Medicago truncatula gene required for nodule differentiation and persistence of rhizobial infections.

Degree:
Department: Biological Sciences
Note:

Plant Physiology, November 2004, Vol. 136, pp. 3682-3691, www.plantphysiol.org/cgi/doi/10.1104/pp.104.045575; © American Society of Plant Biologists

Note:

Abstract: Ethyl methanesulfonate mutagenesis of the model legume Medicago truncatula has previously identified several genes required for early steps in nodulation. Here, the authors describe a new mutant that is defective in intermediate steps of nodule differentiation. The lin (lumpy infections) mutant is characterized by a 4-fold reduction in the number of infections, all of which arrest in the root epidermis, and by nodule primordia that initiate normally but fail to mature. Genetic analyses indicate that the symbiotic phenotype is conferred by a single gene that maps to the lower arm of linkage group 1. Transcriptional markers for early Nod factor responses (RIP1 and ENOD40) are induced in lin, as is another early nodulin, ENOD20, a gene expressed during the differentiation of nodule primordia. By contrast, other markers correlated with primordium differentiation (CCS52A), infection progression (MtN6), or nodule morphogenesis (ENOD2 and ENOD8) show reduced or no induction in homozygous lin individuals. Taken together, these results suggest that LIN functions in maintenance of rhizobial infections and differentiation of nodules from nodule primordia.

Physical Description:

10 p.

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Subject(s):
Keyword(s): Medicago truncatula | genes | Nod factor responses
Source: Plant Physiology, 2004, Rockville: American Society of Plant Biologists, pp. 3682-3691
Partner:
UNT College of Arts and Sciences
Collection:
UNT Scholarly Works
Identifier:
  • DOI: 10.1104/pp.104.045575 |
  • ARK: ark:/67531/metadc40388
Resource Type: Article
Format: Text
Rights:
Access: Public
Citation:
Publication Title: Plant Physiology
Volume: 136
Page Start: 3682
Page End: 3691
Peer Reviewed: Yes