function of seedcoat
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The seed coat (or testa) protects the seed (embryo and endosperm)from mechanical damage (insects, abrasion and being crushed), it also protects the seed from infection by bacteria, virus particles and fungi.The testa prevents the seed from desiccation (drying out), freezing and in some cases the effects of fire.The testa provides a time delay factor to the germination of the seed. The seed coat needs to be wet or immersed in water to initiate germination, this delays the germination of the seed until the conditions for survival of the seedling are increased.
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