1. Stomata: If the number of stomata in the leaf is more, the transpiration is more.
2. Leaf structure: If spongy mesophyll tissue is more in leaves, transpiration is more. If there is hair and scale on the surface of the leaf, the rate transpiration is reduced.
3. Size and number of leaves: If the size and number of leaves is more, the transpiration is more. As the leaves of Morj plants are small and smooth, the transpiration is low.
4. Root-Stem Ratio: The higher the plant’s root-stem ratio, the higher the transpiration rate.
5. Vigour: The transpiration rate of healthy plants is higher than that of diseased plants.
6. Presence of fluff on the leaf: If the leaf is covered with fluff or chaff, the rate of transpiration is reduced.
7. Water in mesophyll tissue: If the amount of water in the mesophyll tissue is high, the rate of transpiration increases. Again, if the amount of water in the mesophyll tissue is less, the rate of transpiration decreases.
8. Effects of hormones: Hormones like cytokinin, abscisic acid etc help to open the pores. As a result, transpiration occurs.
9. Protoplasm concentration: If the protoplasm concentration is high, the absorption pressure of the cell increases and the rate of transpiration increases.