Content of phenolic compounds in the leaves of seagrass Posidonia oceanica (L.) Delile at different depths in Zaglav bay, Dugi otok

Maltar, Janja (2013) Content of phenolic compounds in the leaves of seagrass Posidonia oceanica (L.) Delile at different depths in Zaglav bay, Dugi otok. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

Marine phanerogam Posidonia oceanica (L.) Delile is an endemic Mediterranean seagrass and one of the most important primary producers. It is extremely delicate to changes of environmental conditions. The aim of this study was to assess whether phenolic compounds and activities of the enzymes guaiacol peroxidase and polyphenol oxidase are suitable biochemical indicators of environmental changes. For this purpose, intermediate leaves of Posidonia oceanica were collected during four seasons at 3 and 10 m depth, in Zaglav port, Dugi otok. The content of total phenols, flavonoids and tannins were higher at 3 m depth, and differed in samples collected in different months. Anthocyanins were significantly higher in leaves collected at 3 m depth. The enzyme activities were higher at 10 m, the lowest activity was in April, and the highest in February. Since the amount of phenols and enzymes varied in different seasons and at different depths, the investigated parameters are considered to be suitable markers for monitoring and assessment of changes in the environment.

Item Type: Thesis (Diploma thesis)
Keywords: Posidonia oceanica (L.) Delile, phenolic compounds, flavonoids, anthocyanines, tannins, guaiacol peroxidase, polyphenol oxidase, biochemical markers
Supervisor: Vidaković-Cifrek, Željka
Co-supervisor: Babić, Marija
Date: 2013
Number of Pages: 56
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Grozdana Sirotic
Date Deposited: 19 Feb 2014 13:43
Last Modified: 22 Sep 2014 12:17
URI: http://digre.pmf.unizg.hr/id/eprint/442

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