Water potential can be obtained by
OP + TP
OP = WP
s + p
OP - DPD
In which of the following plant sunken stomata are found ?
Neriumspp
Hydrillaspp
Mango
Guava
Osmotic pressure in the leaf cells is positive during
excessive transpiration
low transpiration
excessive absorption
guttation
The spraying of phenyl mercuric acetate in leaves
increases transpiration
reduces transpiration
increases rate of photosynthesis
causes guttation
The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of
lignified thick walls
cohesion and adhesion
weak gravitational pull
transpiration pull
Meaningful girdling (ringing) experiment cannot be performed within sugarcane because
its phloem is situated interior to xylem
its stem surface is covered with waxy coating
its vascular bundles are not present in a ring
its stem is thin
The direction and rate of water movement from cell to cell is based on
WP
TP
DPD
incipient plasmolysis
Main function of lenticel is
transpiration
gaseous exchange
bleeding
Water enters a cell due to
OP
SP
Two cells A and B are contiguous. Cell A has osmotic pressure 10atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will be
movement of water from cell B to A
no movement of water
equilibrium between the two
movement of water from cell A to B
