Seasonal variations in the cambial anatomy of Tectona grandis (Verbenaceae)

Abstract

A study of seasonal activity of the cambium in Tectona grandis L. f. has shown that the activity initiates in the first week of June, reaches a peak in July and then slowly declines. The length of fusiform cambial initials undergo considerable variations during the activity and dormancy of the cambium. The initiation of cambial activity is closely associated with the opening of the dormant foliar buds in the first week of May. Cambium is more active with high numbers of immature xylem and phloem elements from July to September when the trees are with mature foliage and flowers and dormant from January to April when leaves dry and defoliation takes place. The differentiation of xylem and phloem starts simultaneously and the number of their immature elements reach the maximum in July.

Cambial activity and annual rhythm of xylem production of elephant apple tree (Dillenia indica Linn.) in relation to phenology and climatic factor growing in sub-tropical wet forest of northeast India

“…(Fagaceae), Pistacia alantica Desf. (Anacardiaceae) (Fahn and Werker 1990), as well as the tropical species Tectona grandis L.f (Rao and Dave 1981;Venugopal and Krishnamurthy 1987;Priya and Bhat 1999;Rao and Rajput 2001a, b). Reactivation of the cambium in different months in the same species Trees (2007) growing under different local climatic condition is reported in some evergreen species (Zimmerman and Brown 1971), but such comparative studies for the sub-tropical wet forest are lacking.…”

“…The correlation between cambial growth and rainfall has been assessed in the lowland dipterocarp forest of Peninsular Malaysia (Killmann and Thong 1995). Cambial activity, development of xylem and phenology have been studied in Azardiracta indica L. (Meliaceae) (Rao and Rajput 2001a, b); Tectona grandis L.f (Berlage 1931;Rao and Dave 1981;Venugopal and Krishnamurthy 1987;Rajput 2001a, b, 1999;Priya and Bhatt 1999); Acacia nilotica (L.) Del., Albizzia lebbeck Benth. (Mimosaceae) Rajput 2000, 2001a, b;Venugopal and Krishnamurthy 1987), Dalbergia sissoo Roxb.…”

Relationship between seasonal cambial activity, development of xylem and phenology in Azadirachta indica growing in different forests of Gujarat State

“…Seasonal behavior of vascular cambium in temperate species has been studied widely than tropical ones but relevant studies have been made by earlier workers [1,8,9,22,26,29]. A few experimental studies have also been made to understand the effect of various climatic factors (viz.…”

Inheritance Pattern of Growth and Wood Traits in Teak (Tectona grandis L.f.).

“…Though several studies have been carried out on wood parameters like specific gravity and fibre characteristics in teak using trees of different seed sources and provenances (RAO and DAVE, 1981;RAJPUT et al, 1982;VENU-GOPAL and KRISHNAMURTHY, 1989;PANDEY et al, 1991;INDIRA and BHAT, 1997), only a handful of studies involved estimation of genetic parameters like heritability of growth traits viz., height, diameter and basal area (SWAIN et al, 1996;SHARMA et al, 2000). Selection and breeding for growth and wood traits for obtaining appreciable levels of genetic gains require adequate information on the heritability of these traits.…”