Allelopathic Effects of Water Extracts of Roots from Typha Angustifolia and Scirpus Flaviatilis Stored in a Refrigerator 60-90 Days (Simulated Winter) on Seeds of Lactuca Sativa
Location
CSU 253/4/5
Start Date
24-4-2007 10:30 AM
End Date
24-4-2007 12:30 PM
Student's Major
Biological Sciences
Student's College
Science, Engineering and Technology
Mentor's Name
Beth Proctor
Mentor's Department
Biological Sciences
Mentor's College
Science, Engineering and Technology
Description
Allelopathy is defined as the suppression of growth of one plant species by another due to the release of toxic substances (Webster's dictionary). Typha angustifolia (narrow leaf cattail) and Scirpus fluviatilis (river bulrush) plants were grown both alone (cattail (CT) alone, bulrush (BR) alone) and together (CTCT, CTBR, BRBR) to mimic namral environmental settings to determine if either plant species produced allelochemicals when grown alone or in the presence of a competitor. Lactuca sativa (lettuce) has been shown to be sensitive to allelochemicals (Bonaseral979) and is a rapid germinator. Therefore, lettuce seeds give quick results and provide a good model for determining inhibitory allelopathic effects. Seeds of L. sativa were exposed to aqueous extracts of the roots of T. angustifolia and S. fluviatilis harvested after 100 days from plants grown under the afore mentioned conditions and refrigerated (simulate winter) for 60-90 days. We recorded the number of seeds that germinated over 7 days and on day seven determined the length of each lettuce sprout. We also took photographs to document plant health and used controls (seeds treated with water only). We will present the results of this preliminary study. 71
Allelopathic Effects of Water Extracts of Roots from Typha Angustifolia and Scirpus Flaviatilis Stored in a Refrigerator 60-90 Days (Simulated Winter) on Seeds of Lactuca Sativa
CSU 253/4/5
Allelopathy is defined as the suppression of growth of one plant species by another due to the release of toxic substances (Webster's dictionary). Typha angustifolia (narrow leaf cattail) and Scirpus fluviatilis (river bulrush) plants were grown both alone (cattail (CT) alone, bulrush (BR) alone) and together (CTCT, CTBR, BRBR) to mimic namral environmental settings to determine if either plant species produced allelochemicals when grown alone or in the presence of a competitor. Lactuca sativa (lettuce) has been shown to be sensitive to allelochemicals (Bonaseral979) and is a rapid germinator. Therefore, lettuce seeds give quick results and provide a good model for determining inhibitory allelopathic effects. Seeds of L. sativa were exposed to aqueous extracts of the roots of T. angustifolia and S. fluviatilis harvested after 100 days from plants grown under the afore mentioned conditions and refrigerated (simulate winter) for 60-90 days. We recorded the number of seeds that germinated over 7 days and on day seven determined the length of each lettuce sprout. We also took photographs to document plant health and used controls (seeds treated with water only). We will present the results of this preliminary study. 71
Recommended Citation
Schipper, Nate. "Allelopathic Effects of Water Extracts of Roots from Typha Angustifolia and Scirpus Flaviatilis Stored in a Refrigerator 60-90 Days (Simulated Winter) on Seeds of Lactuca Sativa." Undergraduate Research Symposium, Mankato, MN, April 24, 2007.
https://cornerstone.lib.mnsu.edu/urs/2007/poster-session-C/10
