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NÚMERO 3

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Seasonal fluctuation of photosynthetic pigments of most common red seaweeds species collected from Abu Qir, Alexandria, Egypt

Autores

CORRESPONSAL

Mona M. Ismail

mona_es5@yahoo.com

1

1

Marine Environmental Division, National Institute of Oceanography and Fisheries, 21556 Alexandria, Egypt

Mohamed E. H. Osman

2

2

Botany Department, Faculty of Science, Tanta University, Tanta 31527, Egypt

Resumen

Seasonal changes of pigment composition [Chlorophyll a (Chl-a), total carotenoid (Car.), phycobiliproteins (phycoerythrin (PE), phycocyanin (PC), allophycocyanin (APC))], in the 5 species of Rhodophyta were investigated. Chl a, carotenoids and phycobiliproteins levels showed high contents during winter, whereas decreased in summer showing discoloration tissue from deep red to green or yellow. The results show that the pigment contents were varied seasonally with respect to the algal species and physical and chemical parameters changes, while pH, dissolved oxygen, NO3-, NO2-, NH4+, total nitrogen (TN) and total phosphorus (TP) had direct impact on photosynthetic pigments content, and temperature had significant negative correlation on photosynthetic pigments.

Palabras clave

Environmental parameters, chlorophyll, phycobiliproteins, red seaweeds, seasonal variation

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