| Abstract: | The phytotoxicity of atrazine, paraquat, glyphosate, and alachlor to sago pondweed (Potamogeton pectinatus), a submerged aquatic macrophyte, was tested under three types of laboratory culture conditions. In each case, tests were conducted in static systems, the test period was four weeks, and herbicide exposure was chronic, resulting from a single addition of herbicide to the test vessels at the beginning of the test period. The three sets of test conditions employed were(1) axenic cultures in 125-mL flasks containing a nutrient media and sucrose; (2) a microcosm system employing 18.9-L buckets containing a sand, shell, and peat substrate; and (3) an algae-free system employing O.95-L jars containing reconstituted freshwater and a nutrient agar substrate. The primary variable measured was biomass production. Plants grew well in all three test systems, with biomass of untreated plants increasing by a factor of about 5 to 6.5 during the four-week test period. Biomass production in response to herbicide exposure differed significantly among culture systems, which demonstrates the need for a standardized testing protocol for evaluating the effects of toxics on submerged aquatic plants. |
| Genre: | Book chapter |
| ProdID: | 5210501 |
| Citation Author: | Fleming, W.J.; Ailstock, M.S.; Momot, J.J.; Norman, C.M. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation Editor: | Gorsuch, Joseph W.; Lower, William R.; Wang, Wun-cheng; Lewis, M.A. (editors) |
| Citation End Page: | 275 |
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| Citation Language: | English |
| Citation Larger Work Title: | Plants for Toxicity Assessment: Second Volume |
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| Citation Number Of Pages: | 401 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | 401 |
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| Citation Public Comments: | Papers presented at the 2nd Symposium on Use of Plants for Toxicity Assessment, held in San Francisco, Calif., Apr. 23-24, 1990. |
| Citation Publisher: | American Society for Testing and Materials |
| Citation Series: | Special Technical Publication |
| Citation Series Code: | |
| Citation Series Number: | 1115 |
| Citation Search Results Text: | Response of sago pondweed, a submerged aquatic macrophyte, to herbicides in three laboratory culture systems; 1991; Book chapter; 1115; Plants for Toxicity Assessment: Second Volume; Fleming, W.J.; Ailstock, M.S.; Momot, J.J.; Norman, C.M. |
| Citation Start Page: | 267 |
| Citation Volume: | |
| Citation Year: | 1991 |
| Type: | citation/reference |
| Text: | Response of sago pondweed, a submerged aquatic macrophyte, to herbicides in three laboratory culture systems; 1991; Book chapter; 1115; Plants for Toxicity Assessment: Second Volume; Fleming, W.J.; Ailstock, M.S.; Momot, J.J.; Norman, C.M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 9 Jun 2009 09:23 -0500 |
| Publisher: | American Society for Testing and Materials |
