Under an ideal free distribution:

TLS Online TPP Program

#Question id: 13230

#Unit 6. System Physiology – Plant

In very dry soils, the water potential (Yw) may fall below what is called the permanent wilting point, the water potential of the soil is so low that plants cannot regain turgor pressure even if all water loss through transpiration ceases. This means that

a) The hydraulic conductivity decreases drastically 

b) The water potential of the soil (Yw) is less than or equal to the osmotic potential (Ys ) of the plant

c) The water potential of the soil (Yw) is more than the osmotic potential (Ys) of the plant

d) cell osmotic potential (Ys) varies with plant species, the permanent wilting point is clearly not a unique property of the soil, it depends on the plant species

TLS Online TPP Program

#Question id: 13231

#Unit 6. System Physiology – Plant

The transmembrane pathway is the route followed by water in which

TLS Online TPP Program

#Question id: 13232

#Unit 6. System Physiology – Plant

Plants that develop root pressure frequently produce liquid droplets on the edges of their leaves, a phenomenon known as

TLS Online TPP Program

#Question id: 13233

#Unit 6. System Physiology – Plant

Tracheids are

TLS Online TPP Program

#Question id: 13234

#Unit 6. System Physiology – Plant

Some roots can develop positive hydrostatic pressure in their xylem is called

TLS Online TPP Program

#Question id: 13235

#Unit 6. System Physiology – Plant

Few statements regarding water potential of soil

a) The osmotic potential (Ys) of soil water is generally negligible because solute concentrations are low

b) In wet soils the Hydrostatic pressure (Yp) of soil water is close to zero

c) In dry soils the Hydrostatic pressure (Yp) of soil water is negligible

d) ) The osmotic potential (Ys) of soil water is generally positive because solute concentrations are low

 Which one of the following combination of above statements is TRUE?