Unformatted text preview: favorable for growth. Dormant seeds can remain viable for extended periods of time; the metabolic rate is very diminished, the seed coat protects and the moisture content of the seed is excessively low. Dormant seeds monitor their surroundings in a variety of ways, chemical, mechanical and temporal. • For some, the seed coat must be exposed to abrasion, to physically wear it away. • Others undergo changes in hormone concentrations, notably abscisic acid and gibberellins. • Many seeds break dormancy in response to environmental triggers such as temperature changes, fire, drought or light exposure....
View Full Document
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