Ethylene inhibitors enhance in vitro root formation on faba bean shots regenerated on medium containing thidiazuron
2000
Khalafalla, M.M. | Hattori, K.
The possible involvement of ethylene in in vitro rooting of faba bean (Vicia faba L.) shoots regenerated on medium containing thidiazuron was investigated. The effects of the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC) and three ethylene inhibitors, silver nitrate (AgNO3), acetyl salicylic acid (ASA) and cobalt chloride (CoC12) on root formation were tested in vitro using TDZ-induced shoots of faba bean accession 760. ACC inhibited root formation. In contrast, ethylene inhibitors promoted root formation, AgNO3 at the appropriate concentrations enhanced root emergence and increased root number per shoot, root growth rate, and root length. Both CoC12 and ASA at the appropriate concentrations increased rooting efficiency. These promotive effects may result from a reduction in ethylene concentration or inhibition of ethylene action. The results offer a new approach to improve the rooting efficiency of TDZ-induced shoots of faba bean and possibly of other plant species.
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