Depth-related variation of biochemical markers in Posidonia oceanica at the Eastern coast of the Adriatic Sea (CROSBI ID 541412)
Prilog sa skupa u časopisu | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Tkalec, Mirta ; Vidaković-Cifrek, Željka ; Pevalek-Kozlina, Branka ; Bakran-Petricioli, Tatjana
engleski
Depth-related variation of biochemical markers in Posidonia oceanica at the Eastern coast of the Adriatic Sea
Posidonia oceanica (L.) Delile is an endemic Mediterranean seagrass that forms vast meadows from the sea surface down to depths of more than 30 meters. Recently, many P. oceanica beds are declining due to both natural and anthropogenic disturbances. Because of its wide distribution, sedentary habit, abundance and sensitivity to ecological modifications meadows of P. oceanica have been recommended for biomonitoring in the Mediterranean Sea. In this study lipid peroxidation and free amino acid content as well as the activity and isoenzyme pattern of peroxidases were investigated in the extracts of Posidonia leaves collected from different depths (5, 15, 20 and 32 m) in an unpolluted site near Lastovo Island in order to find out possible variations of the basic levels of stress biomarkers. In general, sheaths (photosynthetically inactive) had higher levels of MDA and free amino acids than blades (photosynthetically active). With the increasing sea depth MDA content decreased in both blades and sheaths while free amino acids increased. The activity of peroxidases was higher in the blades than in the sheaths although native electrophoresis revealed a common isoenzyme pattern. In both blades and sheaths the highest peroxidase activity was measured in P. oceanica living at 15 m while the lowest was in plants from 32 m. Our results showed depth-related variation in the levels of biochemical markers in Posidonia oceanica which should be taken into account in the future biomonitoring.
Posidonia oceanica; biochemical markers; biomonitoring
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Podaci o prilogu
2008.
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objavljeno
Podaci o matičnoj publikaciji
Physiologia plantarum
Vaughan, Hurry
Oxford: Wiley-Blackwell
0031-9317
Podaci o skupu
XVI Congress of the Federation of European Societies of Plant Biology (FESPB)
poster
17.08.2008-22.08.2008
Tampere, Finska