Differential sensitivity of green algae to allelopathic substances from Chara

Mulderij, G.E.; Donk, Ellen Van; Roelofs, J.G.M.

doi:10.1023/a:1024483704903

Cited by 96 publications

(66 citation statements)

References 60 publications

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“…In the current study, a rapid removal of volatile sulphuric compounds might have occurred during the filtration step, which was included in the experimental design between phase I and II. In addition to rapid dilution and disappearance, Mulderij et al (2003) have listed several other potential causes for the absence of an allelopatic effect of Chara on S. obliquus. The absence of an allelopatic effect on S. obliquus might be due to differences in allelopathic activity among strains of C. globularis, which might also depend on growth phase.…”

Section: Discussionmentioning

confidence: 99%

“…Differential sensitivity among Scenedesmus species might be another possibility (Mulderij et al, 2003). However, a very limited number of studies have been performed on allelopathic effects of Chara species with Scenedesmus as target organisms.…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have failed to detect allelopathic effects of macrophytes on Scenedesmus (e.g. Jasser, 1995;Ko¨rner & Nicklisch, 2002;Van Donk & Van de Bund, 2002;Mulderij et al, 2003), which seems to support stagnant water around macrophytes as a major cause for the disappearance of Scenedesmus from the water column.…”

Section: Introductionmentioning

confidence: 99%

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Importance of Nutrient Competition and Allelopathic Effects in Suppression of the Green Alga Scenedesmus obliquus by the Macrophytes Chara, Elodea and Myriophyllum

2006

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Possible allelopathic effects of substances released from the macrophytes Chara globularis, Elodea canadensis, Myriophyllum spicatum on the common green alga Scenedesmus obliquus were tested in the laboratory with plastic plants and untreated medium as controls. A two-phase approach was used in which first the effects of physical presence of plants was studied (phase I) followed by the effects of plant culture filtrates (phase II). In the presence of plastic plants growth was reduced only marginally, but strong growth inhibition of Scenedesmus occurred in the physical presence of all macrophytes. In contrast, filtrates from Chara had no growth inhibitory effect on Scenedesmus. Myriophyllum filtrate reduced particle-based growth rate by 7% compared to filtration controls, while Elodea culture filtrate reduced volume-based growth by 12%, chlorophyll-based growth by 28% and particle-based growth by 15%. Photosystem IIefficiency of Scenedesmus was reduced in all three macrophyte treatments in phase I, but not in filtrates from macrophyte cultures (phase II). Thus, while enzyme activity or other physiological aspects may have been affected, the current study yielded no proof for allelopathically active compounds being directed at photosynthesis. Mean particle volume (MPV) of Scenedesmus was not influenced by macrophyte exudates and cultures remained dominated by unicells. The strong growth inhibitory effects found for Scenedesmus in the physical presence of macrophytes, but not in plastic controls, and no or weaker response in nutrientenriched filtrates, suggest nutrient competition was a more powerful driving factor than allelochemicals. However, the experimental design does not exclude disappearance of allelochemicals during the filtration process.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Importance of Nutrient Competition and Allelopathic Effects in Suppression of the Green Alga Scenedesmus obliquus by the Macrophytes Chara, Elodea and Myriophyllum

2006

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“…gramine, an alkaloid) from Arundo donax L. was an inhibitory allelochemical on Microcystis aeruginosa, and proved it as one of the strongest antialgal allelochemicals originating from aquatic plants (Hong et al 2010). Previous approaches have mainly focused on the isolation of allelopathic compounds from submerged plants (Nakai and Hosomi 2002;Gross 2003;Mulderij et al 2003), emerged macrophytes (He and Wang 2001;Li and Hu 2005;Hong et al 2010) and floating plants (Sun et al 1993). In addition to aquatic macrophytes, a small number of terrestrial plants also exhibited allelopathic effects on algae.…”

Section: Introductionmentioning

confidence: 99%

Effects of Allelochemicals from Ficus microcarpaon Chlorella pyrenoidosa

Zhong-yang

Chang

Gao

et al. 2014

Braz. arch. biol. technol.

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“…Under these conditions, charophytes can improve their own light climate by forming dense beds on the sediment surface (Kufel & Kufel, 2002;Van Donk & Van de Bund, 2002), which have a high nutrient uptake, enhance sedimentation and counteract fish or wind induced sediment resuspension (Scheffer et al, 1993;Van den Berg et al, 1998a; Van den Berg et al, 1999;Kufel & Kufel, 2002). Charophytes may also directly reduce phytoplankton and periphyton growth by releasing allelopathic substances (Mulderij et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Iron addition as a shallow lake restoration measure: impacts on charophyte growth

et al. 2012

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Eutrophication has caused a decline of charophyte species in many shallow lakes in Europe. Even though external inputs of phosphorus are declining, internal loading of P from the sediment seems to delay the recovery of these systems. Iron is a useful chemical binding agent to combat internal phosphorus loading. However, the effects of iron addition on charophytes are not yet known. In this study we experimentally tested the potential toxicity of iron(III)chloride (FeCl 3 ) on two different charophytes, Chara virgata Kützing and Chara globularis Thuiller added at the concentration of 20 g Fe m -2 and 40 g Fe m -2 to the surface water. C. virgata growth was not significantly affected, whereas C. globularis growth significantly decreased with increasing iron concentrations. Nonetheless, biomass of both species increased in all treatments relative to starting conditions. The decrease of C. globularis biomass with high iron additions may have been caused by a drop in pH and alkalinity in combination with iron induced light limitation. Iron addition over a longer time scale, however, will not cause this rapid drop in pH. Therefore, we conclude that adding iron(III)chloride in these amounts to the surface water of a lake can potentially be a useful restoration method.

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Differential sensitivity of green algae to allelopathic substances from Chara

Cited by 96 publications

References 60 publications

Importance of Nutrient Competition and Allelopathic Effects in Suppression of the Green Alga Scenedesmus obliquus by the Macrophytes Chara, Elodea and Myriophyllum

Importance of Nutrient Competition and Allelopathic Effects in Suppression of the Green Alga Scenedesmus obliquus by the Macrophytes Chara, Elodea and Myriophyllum

Effects of Allelochemicals from Ficus microcarpaon Chlorella pyrenoidosa

Iron addition as a shallow lake restoration measure: impacts on charophyte growth

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