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Concentrations of jasmonic acid (JA) (A), salicylic acid (SA) (B), cytokinin (CK) (C), and abscisic acid (ABA) (D) in the leaves and roots of tobacco plants harvested at the end of first and second week of self and non-self interactions. Error bars denote 1 SD. Different uppercase (or lowercase) letters indicate significant differences between groups in roots (or leaves).
