Shoot apex, leaf development and unifacial tip in Agave wightii drumm. et prain (agavaceae)

Kumar, Vishnu ; Awasthi, Devendra K. ; Murty, Yerramilli S. (1984) Shoot apex, leaf development and unifacial tip in Agave wightii drumm. et prain (agavaceae) Journal of Plant Research, 97 (4). pp. 437-446. ISSN 0918-9440

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Official URL: http://www.springerlink.com/content/v02328372073m2...

Related URL: http://dx.doi.org/10.1007/BF02489576

Abstract

The shoot apex has one tunica layer enclosing a mass of corpus which is differentiated cytohistologically into central mother cell zone, flank zone, rib zone and a 'cambium-like' zone. Occurrence of 'cambium-like' zone during minimal phase is considered as an expression of nodal region. Agave wightii shows spirodistichous arrangement of leaves which have an expanded photosynthetic surface with a reduced unifacial tip. Leaves are initiated by periclinal divisions in the second layer. Vertical growth in the leaves is by subapical initials and lateral growth is by marginal and submarginal initials in their early stages of development. The unifacial tip is formed by the extension of adaxial meristematic activity. The derivatives thus formed are pushed to the abaxial side of the primordiuj. Hence the unifacial part of the leaf is regarded as equivalent to a phyllode.

Item Type:Article
Source:Copyright of this article belongs to Springer.
Keywords:Agave wightii; Leaf Development; Shoot Apex; Unifacial Tip
ID Code:32534
Deposited On:31 Mar 2011 08:23
Last Modified:09 Jun 2011 09:27

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