Stimulation of Ethylene Production in the Mung Bean Hypocotyls by Cupric Ion, Calcium Ion, and Kinetin 1

AUTOR(ES)

Lau, Oi-Lim

RESUMO

The synergistic stimulation of ethylene production by kinetin and Ca2+ in hypocotyl segments of mung bean (Phaseolus aureus Roxb.) seedling was further studied. The requirement for Ca2+ in this system was specific. Except for Sr2+, which mimicked the effect of Ca2+, none of the following divalent cations, including Ba2+, Mg6+, Cu2+, Hg2+, Co2+, Ni2+, Sn2+, and Zn2+, showed synergism with kinetin on ethylene production. Fe2+, however, showed a slight synergism with kinetin. Some of them (Hg2+, Co2+, and Ni2+) had a strong inhibitory effect, while others (Zn2+, Mg2+, Sn2+, and Ba2+) had a slight or no inhibitory effect on ethylene production in the absence or presence of kinetin.

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