Ques. 1AIPMT 2000
By which action a seed coat becomes permeable to water?
- scarification
- stratification
- vernalization
- all of the above
Answer
(1) scarification
Solution
A hard, impermeable seed coat is a cause of seed dormancy.
⇒ Scarification is the mechanical abrasion (with knives, sandpaper) or chemical treatment of the seed coat that breaks it and makes it permeable to water and gases.
Stratification is a low-temperature treatment of moist seeds, and vernalization is a low-temperature treatment that promotes flowering; neither acts on the seed coat.
Answer: (1)