No abstract

The growth and development of the vascular plants depend on the transpiration rate. The frequency and dimension of the vessels determine the transpiration efficiency of the xylem. However, this feature of tropical species, particularly Indian tropical trees, is still neglected, hence the current study was designed to study the ecological wood anatomy of Ailanthus excelsa. The results showed that the wood's vulnerability ratio decreased with the tree's age, with the magnitude of the difference (8.71 percent -23.13 percent) usually decreasing with tree age, periphery to pith with minimal variability in a few blocks. The extent of the variation between the mesomorphic ratios from the pith to the periphery increases with the plant's growing age. The ratio of the length and vessel elements (f/v) consistently decrease with the plant increasing age (pith to periphery), the magnitude of the difference of 8.71%-23.13% was in general enhanced with tree age.