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Acclimation of Ceratophyllum demersum to stress imposed by Phragmites australis and Quercus robur leaf extracts.
Ecotoxicol Environ Saf. 2007 Nov; 68(3):335-42.EE

Abstract

Natural and anthropogenic activities lead to deposition of leaves into water bodies, releasing allelochemicals that might influence aquatic biota. Time-response experiments were performed with Ceratophyllum demersum using aqueous Quercus robur and Phragmites australis leaf extracts. The aim was to investigate the ability of C. demersum to acclimate to stress imposed by leaf extracts using antioxidative enzymes (GR, POD, GST, GPx) and photosynthesis as endpoints. Highest enzyme activity and photosynthetic reduction was observed after 24 h in both extracts. After 48 h, photosynthesis and enzyme levels were significantly different from the ones noted at 24 h. Enzyme activities, except GR, and oxygen production did not return to control levels after 1 week in Q. robur extracts. In contrast, enzyme and photosynthetic oxygen levels in P. australis extract recovered after 168 h. Results indicate that increase in antioxidative enzyme levels is part of the protection strategy of C. demersum against oxidative stress.

Authors+Show Affiliations

Leibniz Institute of Freshwater Ecology and Inland Fisheries, Biochemical Regulation, Müggelseedamm 301, 12587 Berlin, Germany.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17572491

Citation

Kamara, Sheku, and Stephan Pflugmacher. "Acclimation of Ceratophyllum Demersum to Stress Imposed By Phragmites Australis and Quercus Robur Leaf Extracts." Ecotoxicology and Environmental Safety, vol. 68, no. 3, 2007, pp. 335-42.
Kamara S, Pflugmacher S. Acclimation of Ceratophyllum demersum to stress imposed by Phragmites australis and Quercus robur leaf extracts. Ecotoxicol Environ Saf. 2007;68(3):335-42.
Kamara, S., & Pflugmacher, S. (2007). Acclimation of Ceratophyllum demersum to stress imposed by Phragmites australis and Quercus robur leaf extracts. Ecotoxicology and Environmental Safety, 68(3), 335-42.
Kamara S, Pflugmacher S. Acclimation of Ceratophyllum Demersum to Stress Imposed By Phragmites Australis and Quercus Robur Leaf Extracts. Ecotoxicol Environ Saf. 2007;68(3):335-42. PubMed PMID: 17572491.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Acclimation of Ceratophyllum demersum to stress imposed by Phragmites australis and Quercus robur leaf extracts. AU - Kamara,Sheku, AU - Pflugmacher,Stephan, Y1 - 2007/06/18/ PY - 2006/12/21/received PY - 2007/04/13/revised PY - 2007/05/06/accepted PY - 2007/6/19/pubmed PY - 2007/12/7/medline PY - 2007/6/19/entrez SP - 335 EP - 42 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 68 IS - 3 N2 - Natural and anthropogenic activities lead to deposition of leaves into water bodies, releasing allelochemicals that might influence aquatic biota. Time-response experiments were performed with Ceratophyllum demersum using aqueous Quercus robur and Phragmites australis leaf extracts. The aim was to investigate the ability of C. demersum to acclimate to stress imposed by leaf extracts using antioxidative enzymes (GR, POD, GST, GPx) and photosynthesis as endpoints. Highest enzyme activity and photosynthetic reduction was observed after 24 h in both extracts. After 48 h, photosynthesis and enzyme levels were significantly different from the ones noted at 24 h. Enzyme activities, except GR, and oxygen production did not return to control levels after 1 week in Q. robur extracts. In contrast, enzyme and photosynthetic oxygen levels in P. australis extract recovered after 168 h. Results indicate that increase in antioxidative enzyme levels is part of the protection strategy of C. demersum against oxidative stress. SN - 0147-6513 UR - https://www.unboundmedicine.com/medline/citation/17572491/Acclimation_of_Ceratophyllum_demersum_to_stress_imposed_by_Phragmites_australis_and_Quercus_robur_leaf_extracts_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0147-6513(07)00106-6 DB - PRIME DP - Unbound Medicine ER -