Hormonal Regulation of Cormel Dormancy in Gladiolus grandiflorus
- 1 June 1973
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Experimental Botany
- Vol. 24 (3) , 558-566
- https://doi.org/10.1093/jxb/24.3.558
Abstract
The germination of dormant gladiolus corrnels is promoted by cold storage and by treatment with 6-benzyladenine (BA). It is inhibited by abscisic acid (ABA) and by gibberellin A3. Ethrel promotes the germination of dormant cormels but inhibits the germination of non-dormant ones. ABA was identified by ORD, GLC, TLC, and wheat coleoptile bioassay as the major endogenous growth inhibitor controlling cormel germination. The ABA level in dormant cormels (summer crop stored at 25 °C) is five to 10 times that in non-dormant ones (winter crop, or cold-stored summer crop). The ABA content of the deeply dormant variety Texas is higher than that of the less-dormant variety Friendship.Keywords
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