Auxin [α-naphthaleneacetic acid (NAA) or indole-3-acetic acid (IAA)] can induce the expression of two lipoxygenases (LOXs) in cultured immature zygotic embryo cotyledons of soybean (Glycine max L.). One of the IAA/NAA-induced LOX isozymes in cultured embryo cotyledons has been demonstrated to be seedling LOX4 (pI 5.09) and another appears to be LOX5 (pI 5.23). The effects of jasmonic acid (JA)