NodMutDB

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since 4/20/2004

Last updated 10/01/09

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Mutant Detail

Mutant Detail:

Mutant Symbol	TR74
Allele Symbol	TR74
Gene and Mutation Location	Mtsym14
Symbiotic Phenotype Brief	Nod+-Fix-Myc+
Phenotype Detail	TR74 was classified as mycorrhizal phenotype 1. Phenotype 1 was similar to the wild type J5. All mutants expressing this phenotype were called Myc+. They form late nodules and are therefore classified as Nod+-, but the few nodules produced are not able to fix nitrogen. On TR74, nodule development is blocked at an early stage: beginning of nodule emergence on roots. At this stage, nodules show differentiation of the peripheral tissue containing the initiation of vascular bundles.
Single gene targeted?	yes
Extra Information
Mutagenesis Method	gamma rays
Mutant Class	Nod+-
Allelism
The earliest development stage known to be affected	Nodule initiation
Wildtype Line	Jemalong J5

References:

Authors	Year	Title	Locator
Morandi D, Prado E, Sagan M, and Duc G	2004	Characterisation of new symbiotic Medicago truncatula (Gaertn.) mutants, and phenotypic or genotypic complementary information on previously described mutants.	Mycorrhiza
Sagan M, de Larembergue H and Morandi D	1998	Genetic analysis of symbiosis mutants in Medicago truncatula	Elmerich C, Kondorosi A, Newton WE (eds) Biological nitrogen fixation for the 21st century. Kluwer, Dordrecht, pp 317?318

Curation Information:

Data entered by	Jing Qiu (12/02/2004)
Updated/Verified by	Jing Qiu (02/12/2005), Chunhong Mao (08/16/2005)
Final verification status	verified by Chunhong Mao (08/16/2005)