Describe in brief the three types of transpiration.
Answers
2. Lenticular Transpiration - Loss of water takes place through lenticles present on the stem of older plants in place of stomata. The amount of water lost is very less. The lenticles never close. They remain open all the time.
3. Cuticular Transpiration - Loss of water takes place through hydathodes present on the surface of leaves. The amount of water lost through this process is the least. It occurs mostly in humid conditions.
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Answer:
Depending upon the plant surface, transpiration is classified into three types:
Type 1. Stomatal Transpiration:
Water vapour diffuses out through minute pore (stomata) present in soft aerial part of plant is known as Stomatal Transpiration. Of the total water loosed, near about 85 – 90% of water loosed by the stomatal transpiration.
Type 2. Lenticular Transpiration:
Sometimes water may evaporate through certain other openings present on the older stems. These openings are called Lenticels and the transpiration that takes place through term is known as Lenticular Transpiration.
Type 3. Cuticular Transpiration:
Loss of water may also take place through cuticle, but the amount so lost is relatively small and make up only about 5 to 10 percent of the total transpiration. This type of transpiration depends upon the thickness of the cuticle and presence or absence of wax coating on the surface of the leaves. Xerophytic plants generally have very thick cuticle and wax coating on the leaves and stem in order to check cuticular transpiration.