Germination and dormancy studies of Pontederia cordata L.'
نویسندگان
چکیده
WHIGHAM, D. F. (Chesapeake Bay Center for Env. Stud., Smithsonian Instn., P.O. Box 28, Edgewater, MD 21037) and R. L. SIMPSON, (Biol. Dept., Rider Coll., Lawrenceville, NJ 08648). Germination and dormancy studies of Pontederia cordata L . Bull. Torrey Bot. Club 109: 524-588. 1982.-Pontederia rootstocks d o not require low temperature treatment to produce shoots and the lack of a required stratification period enables established Pontederia plants to have the longest possible growing season. Seeds are dormant at time of dispersal in late summer and au tumn and will not germinate until they have been stratified for 6-8 weeks. After stratification, seeds germinate best a t constant o r alternating temperatures greater than 20°C. Germination requirements keep seeds from germinating in the fall and permit stratified seeds to germinate in habitats where seedling competition is minimal.
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