Colony formation in Scenedesmus: a literature overview and further steps towards the chemical characterisation of the Daphnia kairomone

Holthoon, Frédérique L. van; Beek, T.A. van; Lürling, Miquel; Donk, Ellen Van; Groot, Aede de

doi:10.1023/a:1024414515222

Cited by 37 publications

(27 citation statements)

References 45 publications

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“…Infochemicals released by herbivorous zooplankton have been reported to be responsible for morphological changes in some species of algae (Hessen and van Donk, 1993;Tang, 2003;van Holthoon et al, 2003). In our study, a number of unicellular algae formed colonies after exposure to 20% flagellate filtrate for five days.…”

Section: Discussionsupporting

confidence: 53%

Benefits and costs of the grazer-induced colony formation inMicrocystis aeruginosa

Yang

Kong

Yang

et al. 2009

Ann. Limnol. - Int. J. Lim.

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-Colonial Microcystis aeruginosa were obtained when the unicellular algae were exposed to flagellate Ochromonas sp. filtrate. To investigate the benefit of this morphological change, flagellates were added into cultures of unicellular and colonial M. aeruginosa, respectively. The clearance rates of flagellates on algae were markedly decreased when they were cultivated with induced colonial M. aeruginosa. This result indicated that colony formation in M. aeruginosa was a predator-induced defense, which could reduce predation risk from flagellate. The increased content of soluble extracellular polysaccharide (sEPS) and bound extracellular polysaccharide (bEPS) may play an important role in adhering M. aeruginosa cells together to form colonies. The decrease of WPS II and the increase of sinking rates of induced colonial M. aeruginosa showed that the costs of grazed-induced colony formation in M. aeruginosa may reflect in the photosystem II efficiency, and in the sinking rates.

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Section: Discussionsupporting

confidence: 53%

Benefits and costs of the grazer-induced colony formation inMicrocystis aeruginosa

Yang

Kong

Yang

et al. 2009

Ann. Limnol. - Int. J. Lim.

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“…However, in contrast to our findings for PST production in A. minutum, colony formation in Scenedesmus spp. is only induced by signals from actively feeding, and not by starving, grazers (van Holthoon et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Copepods induce paralytic shellfish toxin production in marine dinoflagellates

Selander¹,

Thor

Toth³

et al. 2006

Proc. R. Soc. B.

170

208

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Among the thousands of unicellular phytoplankton species described in the sea, some frequently occurring and bloom-forming marine dinoflagellates are known to produce the potent neurotoxins causing paralytic shellfish poisoning. The natural function of these toxins is not clear, although they have been hypothesized to act as a chemical defence towards grazers. Here, we show that waterborne cues from the copepod Acartia tonsa induce paralytic shellfish toxin (PST) production in the harmful algal bloom-forming dinoflagellate Alexandrium minutum. Induced A. minutum contained up to 2.5 times more toxins than controls and was more resistant to further copepod grazing. Ingestion of non-toxic alternative prey was not affected by the presence of induced A. minutum. The ability of A. minutum to sense and respond to the presence of grazers by increased PST production and increased resistance to grazing may facilitate the formation of harmful algal blooms in the sea.

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“…Colony formation is not effective against D. magna , which nevertheless is the most intensely investigated herbivorous zooplankton species with respect to inducible colony formation in S. obliquus (Van Holthoon et al, 2003). For the large D. pulicaria, colony formation did not lower ingestion rates either, but it appeared effective against the smaller D. cucullata (Lürling & Van Donk, 1996).…”

Section: Effective Defencementioning

confidence: 94%

“…However, a final evaluation on the role of chemical pathways involved can only be made if the chemical structure of the infochemical(s) involved is known. Progress has been booked with characterisation of the infochemical involved in D. magna-induced colony formation in S. obliquus (Van Holthoon et al, 2003). However, despite the serious efforts that have been made so far, not a single active compound has been identified yet.…”

Section: Reliable Cuesmentioning

confidence: 99%

Invited Review - Fight on Plankton! or, Phytoplankton Shape and Size as Adaptive Tools to Get Ahead in the Struggle for Life

Naselli-Flores¹,

Barone²

2011

Cryptogamie, Algologie

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Colony formation in Scenedesmus: a literature overview and further steps towards the chemical characterisation of the Daphnia kairomone

Cited by 37 publications

References 45 publications

Benefits and costs of the grazer-induced colony formation inMicrocystis aeruginosa

Benefits and costs of the grazer-induced colony formation inMicrocystis aeruginosa

Copepods induce paralytic shellfish toxin production in marine dinoflagellates

Invited Review - Fight on Plankton! or, Phytoplankton Shape and Size as Adaptive Tools to Get Ahead in the Struggle for Life

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