Photosynthetic pigments in the leaves of seagrass (Posidonia oceanica (L.) Delile) in the coastal area of Zadar

Cvrtila, Adam (2015) Photosynthetic pigments in the leaves of seagrass (Posidonia oceanica (L.) Delile) in the coastal area of Zadar. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

Marine phanerogam Posidonia oceanica (L.) Delile is an endemic species of the Mediterranean Sea. It is extremly sensitive and therefore suitable bioindicator of changes in the marine environment. The aim of this study was to determine the photosynthetic pigments content (chlorophyll a and b and total carotenoids) in the intermediate leaves of P. oceanica collected at depths of 2 (3) and 10 m at three different sites of the coastal area of Zadar (Zadarski kanal, Zaglav and Brbišćica Bay) during the four seasons. The content of photosynthetic pigments have a similar trend of seasonal changes at a particular depth and site. Certain deviation was observed in the amount of total carotenoids in plants from Zadarski kanal at depth of 2 m. In Zaglav Bay at 10 m depth the amount of pigments was relatively constant during the four seasons due to shaded habitat. The ratio of chlorophyll a and b was mostly higher at a depth of 10 m, while the ratio of total chlorophylls and carotenoids on both depths was constant for Brbišćica Bay. High performance liquid chromatography of P. oceanica leaves extracts separated chlorophyll a and b, neoxanthin, violaxanthin, lutein, β- carotene, and α-carotene. Observed dependence of the quantity of photosynthetic pigments on environmental conditions leads to conclusion that they could be good indicators of environmental changes.

Item Type: Thesis (Diploma thesis)
Keywords: chlorophyll a, chlorophyll b, carotenoids, thin layer chromatography, HPLC
Supervisor: Vidaković-Cifrek, Željka
Date: 2015
Number of Pages: 59
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Grozdana Sirotic
Date Deposited: 16 Apr 2015 09:41
Last Modified: 16 Apr 2015 09:41
URI: http://digre.pmf.unizg.hr/id/eprint/3817

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