Abstract
Various disease symptoms in plants are caused by infection with microorganisms. Among the most well-characterized, on a molecular basis, is hyperplasia. Plant tumors incited by bacterial pathogens include crown gall (Agrobacterium tumefaciens), olive knot (Pseudomonas savastanoi), bacterial witches’ broom (Corynebacterium fascians), bacterial gall of Japanese wisteria (Erwinia milletiae), and others (Nester et al., 1981; Nester et al., 1984; Kemper et al., 1985; Kosuge et al., 1983; Kado, 1984; Okajima et al., 1974). It has been shown that these hyperplastic tissues arise because of hormone imbalances, mainly in indoleacetic acid (IAA) and cytokinin. These imbalances arise in the host plant after bacterial infection.Dedicated to the memory of Dr. Tsune Kosuge (who died on 13 March 1988).
Published Version
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