Closure of stomata of normal plants can be induced by,
IAA
ABA
GA3
All of above
If a well watered potted plants is kept very near to a table fan which is switched on to a high speed,the rate of transpiration will be,
increased
decreased
unaffected
steady
The stomata close in water-stressed plants due to accumulation of ABA in,
Mesophyll cells
subsidiary cells
guard cells
None of the above
Which of the following substances are not antitranspirants?
Colour plastics and silicone oils
Low viscosits waxes and ABA
Phenylmercuric acetate and very high conc of Co2
Stomata open at night in,
C3plants
CAM plants
C4 plants
tropical plants
Guttation occurs through,
hydathodes
stomata
both(a) and (b)
lenticels
In plants,transpiration plays an important role in,
ascent of sap
translocation of mineral salts
regulation of temperature
all of above