active absorption of water from the soil by the root is mainly affected by atp.
active absorption of water from the soil by the root is mainly affected by?
atp
active absorption refers to the absorption of water by roots with the help of atp, generated by the root respiration: as the root cells actively take part in the process, it is called active absorption. according to renner, active absorption takes place in low transpiring and well-watered plants, and 4% of total water absorption is carried out in this process. the active absorption is carried out by two theories; active osmotic water absorption and active non-osmotic water absorption. in this process energy is required.





















































section::::active absorption.:active osmotic water absorption.
absorption of water
section::::active absorption.:active non-osmotic water absorption.





















































this theory was given by thimann (1951) and kramer (1959). according to the theory, sometimes water is absorbed against a concentration gradient. this requires expenditure of metabolic energy released from respiration of root cells. there is no direct evidence, but some scientists suggest involvement of energy from respiration. in conclusion, it is said that, the evidences supporting active absorption of water are themselves poor.





















































section::::passive absorption.
absorption of water