Ozone-Sensitive Arabidopsis rcd1 Mutant Reveals Opposite Roles for Ethylene and Jasmonate Signaling Pathways in Regulating Superoxide-Dependent Cell Death
K Overmyer, H Tuominen, R Kettunen, C Betz… - The Plant …, 2000 - academic.oup.com
We have isolated a codominant Arabidopsis mutant, r adical-induced c ell d eath1 (rcd1), in
which ozone (O3) and extracellular superoxide (O2•–), but not hydrogen peroxide, induce
cellular O2•–accumulation and transient spreading lesions. The cellular O2•–accumulation
is ethylene dependent, occurs ahead of the expanding lesions before visible symptoms
appear, and is required for lesion propagation. Exogenous ethylene increased O2•–-
dependent cell death, whereas impairment of ethylene perception by norbornadiene in rcd1 …
which ozone (O3) and extracellular superoxide (O2•–), but not hydrogen peroxide, induce
cellular O2•–accumulation and transient spreading lesions. The cellular O2•–accumulation
is ethylene dependent, occurs ahead of the expanding lesions before visible symptoms
appear, and is required for lesion propagation. Exogenous ethylene increased O2•–-
dependent cell death, whereas impairment of ethylene perception by norbornadiene in rcd1 …
