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In aquatic ecosystems, allelopathic activity depends on the production and secretion of active allelopathic compounds and their effective dispersal in the environment. In addition, macroalgae have been found to produce active metabolites that affect other organisms that compete with them for nutrients. However, the allelopathic activity of Baltic red and brown macroalgae on filamentous cyanobacteria...
Morze Bałtyckie jest wyjątkowym ekosystemem wodnym, charakteryzującym się wyraźnymi zmianami w środowisku, szczególnie w odniesieniu do zasolenia i klimatu. Jest to także miejsce występowania morskich i słodkowodnych organizmów roślinnych, które od stuleci fascynują naukowców. Niewiele jest jednak prac prezentujących bałtyckie glony makroskopowe, jako potencjalne źródło dla zastosowań komercyjnych...
Związki bioaktywne sinic wykazują różnorodne właściwości, które potencjalnie mogą być wykorzystane w wielu sektorach przemysłu. W artykule tym szczególny nacisk położono na wykorzystanie sinic i ich cyjanometabolitów, zarówno w przemyśle farmaceutycznym, jak i medycznym. Scharakteryzowano związki wyizolowane ze szczepów sinic, które można stosować do wytwarzania leków o działaniu przeciwwirusowym,...
Allelopathy is a prevalent natural phenomenon in aquatic ecosystem. We reported the effects of the green macroalga Ulva intestinalis L. collected from estuaries of the Baltic Sea (Poland) on the growth and chlorophyll fluorescence of common filamentous cyanobacterium Nostoc sp. It was found that the addition of 50 µL mL–1 extracts obtained from U. intestinalis inhibited growth of cyanobacterium and...
It is commonly believed that the structure of phytoplankton and the formation of cyanobacterial and algal blooms may be explained by allelopathic interactions. The main aim of this study was to investigate the allelopathic effect of picocyanobacterium Synechococcus sp. on the following growth and fluorescence parameters: the maximum quantum yield of PSII photochemistry (Fv/Fm), and the effective quantum...
The experiments on three Baltic picocyanobacterial strains of Synechococcus (BA-120 – red strain, BA-124 – green strain and BA-132 – brown strain) were conducted at four scalar irradiances in Photosynthetically Active Radiation (PAR) and four temperature levels. The main aim of this work was to estimate the effect of environmental conditions (temperature and PAR) on cell concentration and photosynthetic...
Allelopathic compounds produced by picocyanobacteria could affect the growth and development of biological systems. The main aim of this study was to investigate the influence of unknown allelochemicals obtained from picocyanobacterium Synechocystis sp. BA-153 in monocultures and in mixed cultures. In this study, we demonstrated that Synechocystis sp. BA-153 caused allelopathic effects against other...
Picocyanobacterium Synechococcus sp. is very important but still poorly understood component of marine and freshwater ecosystems. In this study, the effect of single and multiple addition of cell-free filtrate obtained from Synechococcus sp. on selected cyanobacteria Synechocystis sp., Geitlerinema amphibium, Nodularia spumigena and Nostoc sp. was investigated. The species present in this work are...
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