Background participate in plant response against pathogens, herbivores

Full list of author information is available at the end of the articlePlant hormones play a key role in the regulation of plant development and response to various biotic and abiotic stresses. Salicylic acid (SA), abscisic acid (ABA), jasmonic acid (JA) and related compounds (Figure 1) are known to and abiotic factors such as UV irradiation, ozone exposure, high and low temperature, osmotic stress and mechanical wounding [1-5]. Wounding is known to trigger multiple plant defense mechanisms, such as synthesis of proteinase inhibitors, phytoalexins and volatile attractants, all directly mediated by jasmonates [4,6] and influenced by SA [1] and ABA [3]. (+)-7-iso-JA is synthesized in chloroplasts and peroxi-somes [5] and is then converted into the biologically active conjugate (+)-7-iso-JA-isoleucine (JA-Ile) [2]. In Arabi