Interactions between auxin and ethylene in root-knot nematode (Meloidogyne javanica) infected tomato roots†

摘要: An increase in the rate of ethylene production occurred excised tomato roots, whether or not infected with Meloidogyne javanica , when incubated media containing indole acetic acid (IAA) above 0·6 μ M . However, overall was considerably less pronounced roots than uninfected ones. Application IAA to cultures resulted an gall fresh weight which concentration-dependent and corresponded concentration IAA, stimulated production. The hypertrophied cortical parenchyma tissue galls treated 6·0 wider that untreated galls. levels free bound endogenous were higher tissues, attaining their highest 10 days after inoculation coincident time tissue. interaction between auxin regarding host—parasite interrelationships root-knot nematode is discussed.