Influence of cytokinins on the methyl jasmonate-promoted senescence in Helianthus annuus cotyledons
作者： G.R. Naik , I. Mukherjee , D.M. Reid
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摘要: Cotyledons of seven-day-old sunflower seedlings were pretreated withcytokinins prior to exposure methyl jasmonate (MeJA). The rate senescencewas then followed by measuring chlorophyll loss, electrolyte leakage, ethyleneproduction, and 1-aminocyclopropane-1-carboxylase (ACC) oxidase activity. MeJApromoted all these senescence parameters the MeJA effects partiallyblocked cytokinin pretreatment. 8-azaguanine, which has been reported tohaveanticytokinin activity, blocked ability benzyl adenine (BA) reversethe effect on senescence. also increased SOD catalaseactivity,decreased protein content. However, while BA more than overcamethe content activity it did not antagonize theeffect catalase.
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