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The apical control of lateral bud development in excised shoot tips of Cuscuta reflexa cultured in vitro

Maheshwari, Ramesh and Sreekrishna, S (1982) The apical control of lateral bud development in excised shoot tips of Cuscuta reflexa cultured in vitro. In: Physiologia Plantarum, 56 (4). pp. 471-484.

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Excised shoot tips of Cuscuta reflexa Roxb. (dodder), a rootless and leafless angiospermic plant parasite, were cultured in vitro for the study of the control of lateral bud development by the apex. In a chemically defined medium lacking hormones, the basal bud alone developed into a shoot. The addition of coconut milk to the growth medium induced the activation of multiple lateral buds, but only a single bud developed further into a shoot. The decapitation of this shoot induced the development of another shoot and the process could be repeated. This showed the controlling effect of the apex in correlative control of bud development. Application of indole-3-acetic acid to the shoot tip explant delayed the development of the lateral bud. Gibberellic acid A3 induced a marked elongation growth of the explant and reinforced apical dominance. The direct application of cytokinin to an inhibited bud relieved it from apical dominance. A basipetally decreasing concentration gradient of auxin may prevail at the nodes. Bud outgrowth is probably stimulated by cytokinin produced locally in the bud.

Item Type: Journal Article
Publication: Physiologia Plantarum
Publisher: Blackwell Publishing
Additional Information: Copyright of this article belongs to Blackwell Publishing.
Department/Centre: Division of Biological Sciences > Biochemistry
Date Deposited: 14 Jul 2009 13:19
Last Modified: 14 Jul 2009 13:19
URI: http://eprints.iisc.ac.in/id/eprint/21497

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