The Stomata of <I>Eucalyptus</I> Hybrid Trees from a Transect across the Tarai Area of Uttar Pradesh, India

Abstract

The stomatal studies were done on 10 trees of Eucalyptus hybrid selected at equal distance along a 3.5 km long transect in Taral area of U.P. to determine under what conditions the species can tap the water table by deep rooting as alleged frequently. The results show that as such there is no co-relation between the tree position on transect and stomatal conductance. But the number of stomata open, the tree as well as surfaces show significant difference among themselves. For the character width of stomata, only tree effects are significantly different. For rest of the characters the factors under study are not significantly different even at 5% level of probability. However, on the basis of means, in general, the abaxial surface, top portion and mature leaf are having higher values than adaxial surfaces, basal portions and young leaves respectively. An analysis of variance was carried out to see whether the tree and aspect exhibit any significant difference in their effects on each of the characters studied separately. It was found that all the characters, the tree as well as aspects did not differ in their effect significantly.