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The overexpression of LEAFY COTYLEDON2 (LEC2) in Arabidopsis, results in the induction of somatic embryogenesis (SE) in an auxin-free environment and the stimulation of auxin biosynthesis was postulated as being involved in this response. To gain further insight into the hormone-related functions of LEC2 in SE, the effect of LEC2 overexpression on the hormone content in Arabidopsis plants and in vitro cultured explants was analysed. In addition to indole-3-acetic acid (IAA) and cytokinins (CKs), which are hormones that play a key role in plant development, the stress-related hormones, abscisic acid (ABA) and salicylic acid (SA), which are involved in the stress response that is related to SE-induction, were analysed. Together with the observations that LEC2 activity can compensate for the auxin treatment required for SE induction (Ledwoń and Gaj in Plant Tissue Cell Org Cult 28:1677–1688, 2009 …