![]() As a result, the guard cells become turgid. Thus, the guard cells absorb water from the neighboring cells. During the daytime, the guard cells perform photosynthesis due to which osmotic pressure increases. The opening and closing of stomata operate as a result of turgidity changes in the guard cells. The factors which affect stomatal movement are. the number and distribution of stomata.Transpiration rate depends on various factors such as In isobilateral leaf in a monocotyledonous plant, the number of stomata is equal on both the surfaces. This adaptation helps in reducing the evaporation of water. In a dorsiventral dicotyledonous leaf, the number of stomata on the lower surface is higher when compared to the upper surface. The orientation of microfibrils is radial rather than longitudinal. Also, the peculiar arrangement of the microfibrils of the guard cells aids in opening and closing of the stomatal aperture. The inner wall of the guard cell towards the stomata is thicker as compared to the outer walls. Two kidney-shaped cells known as guard cells, guard the pores. Stomata are the tiny pores present in the epidermal surface of leaves. The opening and closing of stomata regulate transpiration. This, in turn, brings down the temperature of the leaves. As a result, water vaporizes and is given out in the atmosphere. Leaves absorb visible and invisible radiations of the sun. Lenticular Transpiration: It is the evaporation of water through lenticels. Lenticels are the tiny openings present on the woody bark.īrowse more Content under Transport In Plants.Cuticular transpiration is lesser in xerophytes because they have thicker cuticles. It causes around 20% of transpiration in plants. Cuticular transpiration: Cuticle is an impermeable covering present on the leaves and stem. ![]() They account for around 80 to 90% of the total water loss from the plants. ![]() Stomata are specialized pores in the leaves. Stomatal transpiration: It is the evaporation of water through stomata.Depending on the organ that performs transpiration, the different types are: ![]()
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