The effect of ethylene on adventitious root formation in mung bean (Vigna radiata) cuttings |
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Authors: | J. A. Robbins M. S. Reid J. L. Paul T. L. Rost |
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Affiliation: | 1. Department of Environmental Horticulture, University of California at Davis, 95616, Davis, California 2. Depatment of Botany, University of California at Davis, 95616, Davis, California
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Abstract: | A promotive effect of ethylene on the formation of adventitious roots by mung bean cuttings was demonstrated using a recirculating solution culture system to apply dissolved ethylene. The number of roots increased in proportion to the length of exposure to the gas. Mean root numbers per cutting for a 4-day exposure to ethylene and an air control were 45 and 19, respectively. The tissue was most sensitive to a 24-h ethylene “pulse” 2–3 days after taking cuttings. Rooting was maximal at a concentration of 13 μl 1?1 ethylene. The ethylene treatment inhibited the growth of roots and terminal buds. Application of Ag+, as silver thiosulfate, reversed the effect of ethylene on the two growth responses but had no effect on root numbers. Norbornadiene, another inhibitor of ethylene action, reversed all three ethylene responses. |
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