Research Article | Published: 01 December 2000

Sequential leaf development in Ficus palmata Forsk.

G. S. Paliwal, B. Singh and M. K. Paliwal

Indian Journal of Forestry | Volume: 23 | Issue: 4 | Page No. 457-465 | 2000
DOI: https://doi.org/10.54207/bsmps1000-2000-IV451I | Cite this article

Abstract

The sequential development of a leaf usually has four well-defined phases, viz.: (a) Initiation of the leaf primordium (b) Further development of individual leaf (c) Growth of the leaf surface as a whole in relation to the life-history of the plant, and (d) Influence of various mechanisms controlling leaf initiation and growth. The new leaves start appearing in Ficus palmata during end of February and the first week of March and continue to do so still June and July. For the present study, the leaf samples had been collected from a healthy tree growing in the study area and their outlines were traced on a sheet of graph paper for estimating the leaf area. The leaves show a sigmoid pattern during their growth (in volume) in a total period of 20 days. During this span its size increases from 36 mm2 to 6,160 mm2, as recorded by the average size of the mature leaves. The percentage gain of the leaf area has been found to be highest on the third days (89.28%). The vascular system comprises a single main vein (the midrib or 1o vein) which passes through the centre of the lamina. Subsequently, secondaries, tertiaries and quaternaries are formed along with the intermediaries. At the early stage of leaf development, the number of areoles per unit area is low (large areoles) but at maturity it increases (smaller areoles). As regards the number of vein-tips/vein-endings per areole, it varies from 0.1 on the first day of emergence to 1.4 between fourth and six day. Its further growth is usually regarded to be the product of divisions, expansion and subsequent differentiation of the component cells, comparable to the other plant organs. The highest number (11.8) of vein - tips in an areole has been observed at the later stages of leaf growth. It is thus being stated that the leaf of this species is indicative of initial rapid growth.

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How to cite

Paliwal, G.S., Singh, B. and Paliwal, M.K., 2000. Sequential leaf development in Ficus palmata Forsk.. Indian Journal of Forestry, 23(4), pp.457-465. https://doi.org/10.54207/bsmps1000-2000-IV451I

Publication History

Manuscript Published on 01 December 2000

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