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Unformatted text preview: germinate unless exposed to a specific period of cold. In a similar fashion, many plants will not flower until the plant has been exposed to cold temperatures. Perennials that have bulbs or corms frequently require a cold period to break dormancy and initiate above ground growth and flowering. This cold requirement to break bud or seed dormancy is called vernalization. Artificially inducing plants to break dormancy by providing the essential treatment is called stratification. Some temperature requirements can be overridden with gibberellins. • Abrasion – Weakening the Seed Coat Some seeds must have the seed coat subject to abrasion prior to germination. Stomach acid often does this, or a period of time in soil, which is harsh on surfaces. The abrasion makes the seed coat weaker and more permeable to water, which is needed for germination....
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This note was uploaded on 01/08/2012 for the course BIO 213 taught by Professor Makina during the Fall '09 term at SUNY Stony Brook.
- Fall '09