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ABA content in tomato plants. Wild-type (MM) and ABA- deficient (notabilis, flacca, and sitiens) mutant tomato plants were wounded or treated with electrical current or heat. Both directly treated (local) and nontreated distal leaves (systemic) were harvested after 6 h. Endogenous levels of ABA were determined as described in Methods and are indicated as means ± se (n = 5). FW, Fresh weight.
