angiodevelop213-page7

angiodevelop213-page7 - Once dormancy is broken, the seed...

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Flowering Plants: Early Growth and Development - 7 Germination is initiated when the seed experiences the "trigger" to break dormancy (which is the cessation of the "negative" experience. Most seeds will not germinate until the negative experience has taken place. For example, a seed that must experience cold, will not germinate if harvested and kept warm. Some seeds have remarkable viability. There are documented records of seeds held in storage for decades that retain viability. Michigan State University underwent a long- term viability study with sets of seeds, removing them every decade and testing germination. A number were viable after a century. A lotus seed, Nelumbo nucifera , collected from a dry lake bottom in China germinated after 1200 years of dormancy.
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Unformatted text preview: Once dormancy is broken, the seed can successfully germinated if the proper conditions are met. Lotus Fruit with Seeds Conditions needed for Germination (post dormancy) 1. Imbibition of much water, to restore the seed moisture content. 2. Sufficient oxygen to provide for rapid aerobic cell respiration 3. Warm temperatures to facilitate rate of enzyme activity It also helps if the embryo has a good nutrient supply (often a mixture of carbohydrates, oils and proteins) for cell respiration. Hormones produced in the embryo regulate the conversion of stored nutrients in the seed 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.

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