.... In Arabidopsis thaliana , miR172 is expressed in the inner floral whorls where it downregulates the class A gene APETALA 2 ( AP2 ). However, what controls this predominantly inner whorl-specific expression of miR172 is not known. We show that the LEUNIG (LUG) and SEUSS (SEU) co-repressors repress miR172...

... and precocious expression of AGAMOUS mRNA, leading to partial homeotic transformation of floral organs in the outer two whorls. The effects of seuss mutations are most striking when combined with mutations in LEUNIG , a previously identified repressor of AGAMOUS . More complete homeotic transformation of floral...

...Zhongchi Liu; Elliot M. Meyerowitz ABSTRACT LEUNIG was identified in a genetic screen designed to isolate second-site enhancer mutations of the floral homeotic mutant apetala2-1. leunig mutations not only enhance apetala2 , but by themselves cause a similar but less-pronounced homeotic...