Allelopathic activity of picocyanobacterium Synechococcus sp on filamentous cyanobacteria

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Sliwinska Wilczewska, S (Author) Other; Maculewicz, J (Author) Other; Felpeto, AB (Author) Other; Vitor Vasconcelos (Author) FCUP; Latala, A (Author) Other

Journal

Title: Journal of Experimental Marine Biology and Ecology

Vol. 496

Pages: 16-21

ISSN: 0022-0981

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 13 Citations

Scopus - 23 Citations

Other information

Authenticus ID: P-00N-0PR

DOI: 10.1016/j.jembe.2017.07.008

Abstract (EN): Allelopathy of picocyanobacterium Synechococcus sp. may be involved in the formation of massive blooms and their subsequent global expansion in many aquatic ecosystems. However, the effect of the allelopathic activity of this species on filamentous cyanobacteria remains unknown. In this study, we tested the allelopathic activity of Synechococcus sp. on growth, pigment content and chlorophyll fluorescence of filamentous cyanobacteria Aphanizomenon flos-aquae, Nostoc sp., Phormidium sp. and Rivularia sp. by single and repeated addition of cell free filtrate. Negative effects against Nostoc sp. and Phormidium sp. were amplified by repeated filtrate additions compared with single filtrate addition. A maximum reduction in growth and a maximum quantum yield of photosystem II (PSII) photochemistry (F-gamma/F-m) relative to controls were observed for Phormidium sp. However, the addition of picocyanobacterial filtrate stimulated the growth and F-v/F-m of A. flos-aquae. Synechococcus sp. filtrate had no allelopathic effects on the growth and Fv/Fm of Rivularia sp. Moreover, filtrates caused significant decreases in the chlorophyll a (Chl a) contents of Phormidium sp. and Rivularia sp. cells. The addition of filtrate also resulted in increased cell carotenoid (Car) content in A. flos-aquae and Nostoc sp. These results showed for the first time that picocyanobacterium Synechococcus sp. negatively and positively affected coexisting filamentous cyanobacteria.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6