Phenotypic plasticity in the green algae Desmodesmus and Scenedesmus with special reference to the induction of defensive morphology

Lürling, Miquel

doi:10.1051/limn/2003014

Cited by 187 publications

(161 citation statements)

References 86 publications

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“…This means that the slight differences in MPV between phase I controls and plant treatments and phase II filtrates points to a treatment related effect either from the filtration or algal conspecifics. Nonetheless, MPV values were all within the range of populations dominated by unicells and bicells (Lu¨rling, 2003). Furthermore, Scenedesmus showed no signs of clumping and/or becoming sticky.…”

Section: Discussionmentioning

confidence: 86%

“…In the current study, cell size of Scenedesmus expressed as MPV was not affected in the presence of macrophytes or filtrates and no colonies were formed. The MPV varied over time in controls which was the results of normal growth and subsequent carbon-limitation in batch cultures (Lu¨rling, 2003). Scenedesmus expressed identical morphological variability in two consecutive trials under comparable conditions, i.e.…”

Section: Discussionmentioning

confidence: 92%

“…In addition to standard endpoints as growth and photosynthesis, effects on mean particle volumes (MPV) were examined. Changes in particle volumes in the presence of plants could reflect an influence in cell or colony size and thereby on sinking properties as Scenedesmus colonies do have higher sinking rates than unicells (Lu¨rling, 2003).…”

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: 86%

Section: Discussionmentioning

confidence: 92%

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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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“…In the vast majority of these studies the alga used was Scenedesmus, which is known for its extreme morphological variability (Trainor 1998). In the (chemical or physical) presence of zooplankton, Scenedesmus may increase its size to resist mortality from grazers (Lürling 2003). However, most studies in the wealth of research on effects of algal nutritional quality on the energy flow to zooplankton has been unidirectional, with no feedback between grazers and algae and no focusing on possible algal defences.…”

Section: Lürlingmentioning

confidence: 99%

Investigation of a rotifer (Brachionus calyciflorus) - green alga (Scenedesmus pectinatus) interaction under non- and nutrient-limited conditions

Lürling

2006

Ann. Limnol. - Int. J. Lim.

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“…Developmental plasticity has been suggested as crucial in the formation of evolutionary novelties (West-Eberhard, 2003) and promoting innovation (Moczek et al, 2011). In unicellular organisms at an individual cell level, developmental plasticity is associated with morphological changes (Lu¨rling, 2003;Luo et al, 2006;Bollmann et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Developmental plasticity and genotype–environment interactions influence valve morphology in theCyclotella meneghinianaspecies complex (Bacillariophyceae)

Shirokawa

Karino

Mayama

2012

European Journal of Phycology

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We investigated salinity-induced developmental plasticity and difference in the 'reaction norm' of clonal cultures (genotypeenvironment [G Â E] interaction) of Cyclotella meneghiniana, isolated from different locations, and their F 1 offspring. Genetic distances between strains and the phylogenetic position of each strain were investigated by partial 28S rDNA sequencing. In addition, we investigated morphological differences between cells obtained from different sites along a tidal river, from the lower reaches to the river mouth. In laboratory culture, all strains exhibited a greater number of central fultoportulae (CFP ¼ central strutted processes) in saline medium (salinity, 17 psu) than in freshwater medium; the number of striae on the valve and the diameter of the central area increased in all but three strains. A significant G Â E interaction was detected in the number of CFP, the number of striae, the diameter of the central area and the valve diameter. Pair-wise comparison showed significant G Â E interactions for these traits among strain pairs. In the field-collected material, all parameters (CFP number, stria number, central area diameter and valve diameter) were greatest at the estuary mouth.

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Phenotypic plasticity in the green algae Desmodesmus and Scenedesmus with special reference to the induction of defensive morphology

Cited by 187 publications

References 86 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

Investigation of a rotifer (Brachionus calyciflorus) - green alga (Scenedesmus pectinatus) interaction under non- and nutrient-limited conditions

Developmental plasticity and genotype–environment interactions influence valve morphology in theCyclotella meneghinianaspecies complex (Bacillariophyceae)

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