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Question

Which of the following is/are causes of seed dormancy?

A
Impermeable and hard seed coat
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B
Presence of chemical inhibitors like phenolic acid.
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C
Immature embryos
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D
All of the above
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Solution

The correct option is D All of the above
Seed dormancy is defined as a condition in which seeds do not germinate even when the environmental conditions are favourable (i.e proper temperature, water, sunlight, air).
Seed dormancy may be caused because of the following reasons:
i) Impermeable and hard seed coat.
ii) Presence of chemical inhibitors like abscisic acid, phenolic acid, para-ascorbic acid.
iii) Immature embryos

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