| Mutant Symbol |
Allele or Genotype |
Mutant Gene |
Phenotype Detail |
Symbiotic Phenotype Brief |
Mutagenesis Method |
Mutant Class |
WT Strain or Line |
|---|
| M4 | lin | lin | The lin mutant shows root hair branching in response to inoculation of S. meliloti. The mutant develops visible nodule primordia, but has a reduced infection phenotype (Inf+-). The number of infection events is reduced relative to wild type, and those infections that do form are arrested soon after infection thread initiation. There are no infection threads in nodule primordia. Mycorrhizal infections of lin are normal. | Hab+Inf+-Ccd+Nod-Myc+ | EMS | Nod- | Jemalong A17 | | C88 | lin-1 | lin | The mutant developed small white bumps in response to Sinorhizobium meliloti and showed a 4-fold reduction in the number of infections, all of which arrested in the
root epidermis. Nodule primordia initiated normally but failed to mature. Transcriptional markers for early Nod
factor responses (RIP1 and ENOD40) are induced in the mutant, 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. | Hab+Hac+Inf+-Nod- | EMS | Nod- | Jemalong A17 |
|
| Authors |
Year |
Title |
Locator |
|---|
| Cohn JR, Uhm T, Ramu S, Nam YW, Kim DJ, Penmetsa RV, Wood TC, Denny RL, Young ND, Cook DR, and Stacey G | 2001 | Differential regulation of a family of apyrase genes from Medicago truncatula | Plant Physiol. 125(4):2104-19 | | Kuppusamy KT, Endre G, Prabhu R, Penmetsa RV, Veereshlingam H, Cook DR, Dickstein R and Vandenbosch KA | 2004 | LIN, a Medicago truncatula Gene Required for Nodule Differentiation and Persistence of Rhizobial Infections | Plant Physiol. 136(3):3682-91 | | Navarro-Gochicoa MT, Camut S, Niebel A and Cullimore JV | 2003 | Expression of the apyrase-like APY1 genes in roots of Medicago truncatula is induced rapidly and transiently by stress and not by Sinorhizobium meliloti or Nod factors | Plant Physiol. 131(3):1124-36 |
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