Question

Absorption of water from soil by seeds increases the _______ thus helping seedlings to come out of soil.

• A. $DPD$
• B. diffusion pressure
• C. imbibition pressure
• D. solute potential

Answer 1

Answer: (C)

imbibition pressure

Answer 2

Imbibition is the initial step in the germination of the seeds. When mature seeds are sown in soil, they imbibe water and swell. The water is imbibed first by seed coat and then by other tissues of embryo and endosperm. The process of imbibition is important to initiate the seed germination. The pressure that an imbibant develops when submerged in pure imbibing liquid is called imbibition pressure.