Involvement of nitric oxide and auxin in signal transduction of copper-induced morphological responses in Arabidopsis seedlings

Abstract

In plant organs, Cu(2+) excess results in severe morphological responses during which the endogenous hormonal balance and signal transduction are affected. Auxin and NO negatively regulate each other's level and NO intensifies the metal-induced cotyledon expansion, but mitigates elongation processes under Cu(2+) exposure.