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

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Apr 24th, 10:30 AM Apr 24th, 12:30 PM

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