Basic mutant information   
Mutant name AtMYBLox
Mutant/Transgenic transgenic
Ecotype Col-0
Mutagenesis type Transgene
(Semi-)Dominant/Recessive dominant
Description AtMYBL-overexpressing plants displayed a markedly enhanced leaf senescence phenotype. Moreover, the ectopic expression of the AtMYBL gene was very significantly influential in senescence parameters including chlorophyll content, membrane ion leakage, and the expression of senescence-related genes.
References
1: Zhang X, Ju HW, Chung MS, Huang P, Ahn SJ, Kim CS
The R-R-type MYB-like transcription factor, AtMYBL, is involved in promoting leaf senescence and modulates an abiotic stress response in Arabidopsis.
Plant Cell Physiol. 2011 Jan;52(1):138-48

Mutated genes   
Locus name AT1G49010
Alias AtMYBL
Organism Arabidopsis thaliana
Description R-R-type MYB-like Transcription Factor
Phenotype information   
Darkness induced senescenceLeaf coloryellow