Assertion: When the ambient temperature is high and soil contains excess of water, the plants tend to lose water in the form of droplets from lenticels.
Reason: Root pressure regulates the rate of loss of water form lenticels
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
A.
If both assertion and reason are true and reason is the correct explanation of assertion
When the ambient temperature is high and soil contains excess water, the rate of transpiration is increased i.e.. loss of water takes place from leaves through stomata. Lenticular transpiration is only 0.1 % of the total transpiration. It however continues day and night because lenticels have no mechanism of closure. The lcnticcls connect the atmospheric air with the cortical tissue ofstem through interccllular spaces present amongst the complementary cells. Root pressure regulates the rate of loss of water from the stomata in some plants. High temperature may cause desiccation and closure of stomata. Root pressure is a positive pressure that develops in the xylem sap of the roots of some plants.
