[Light-dependent ethylene signal abnormality of the arabidopsis auxin-related uro mutant].

The Arabidopsis semi-dominant mutant upright rosette (uro) was named from its upright-growing leaves. Previous results suggest that uro mutant was caused by a single gene mutation and the URO function might be associated with auxin-mediated plant development. In this paper, some ethylene-related phenotypes of uro mutant are reported, such as hyponastic rosette leaves, persistent off perianth and elongated hypocotyls. Results of ACC and ethylene inhibitor AgNO(3) treatment experiment suggest that some of the phenotypes of uro mutant are caused by ethylene signal system abnormality. uro mutant is an important material for studying the ethylene signal system especially for the relationship between auxin and ethylene.