During the day, the turgidity of leaf cells decreases, but they regain it during the night. What is this process called?

Choose true and false statements from the following:
$I.$ Mycorrhizal association between fungus and root of plant $(Pinus)$ is often obligate.
$II.$ $Pinus$ and orchid seeds can germinate and grow into plant in absence of mycorrhizal association.
$III.$ Absorption of water along with mineral solute by root hairs is purely a process of diffusion.
$IV.$ In apoplast pathway,movement of water takes place through cell wall and intercellular spaces.
$V.$ Fungal hyphae provide sugar and organic internal to root.
Choose the correct option.

Which of the following facts proves that the translocation of materials occurs through the phloem?

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 from lenticels.

Which of the following is not observed during the apoplastic pathway?

Select the correct option from the following.