Unformatted text preview: Seed dormancy Almost all seeds undergo some period of dormancy—if they did not, they would start to grow in the fruits on the mother plant and defeat their principal purposes: dispersal and survival of the germplasm. The period between the formation of the seed and the time when it will germinate is called the after-ripening period , which may be a few days or months depending on the plant. Seeds of plants native to regions with cold winters almost all require an after-ripening period of cold temperatures before they will germinate. This requirement can be met in horticultural and crop varieties by refrigerating the moist seed for a period of time. This procedure is called stratification . Dormancy of seeds with hard seed coats often can be broken artificially by scarifying the seed— mechanically thinning the seed coat with a file or nicking it with a knife, allowing water and oxygen to...
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This note was uploaded on 11/14/2011 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.
- Fall '08