Formation and functional significance of storage products in cyanobacteria

Kromkamp, Jacco C.

doi:10.1080/00288330.1987.9516241

Cited by 93 publications

(58 citation statements)

References 81 publications

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“…In the Preplete Aphanizomenon flos-aquae treatment the PP:chl a ratio stabilizes at approximately 0.3. Both species seem to be very efficient in cellular phosphorus storage, in accordance with earlier reports (Kromkamp 1987). Nevertheless, N. spumigena seems to have a relatively higher cellular phosphorus quota.…”

Section: Discussionsupporting

confidence: 78%

Use of different phosphorus sources by the bloom-forming cyanobacteria Aphanizomenon flos-aquae and Nodularia spumigena

Vahtera¹,

Laamanen²,

Rintala³

2007

Aquat. Microb. Ecol.

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A laboratory experiment was conducted to study differences in the use of varying phosphorus sources by the bloom-forming filamentous cyanobacteria Aphanizomenon flos-aquae and Nodularia spumigena. Axenic strains were grown in typical bloom-time light regimes under phosphate-replete, added organic phosphorus phosphate-depleted and completely phosphorus-depleted conditions. Responses to the treatments differed clearly. A. flos-aquae growth was dependent on an ample supply of inorganic dissolved phosphorus, whereas N. spumigena grew equally well in all treatments. Cellular N:P ratios showed high plasticity for both species and phosphorus deficiency did not seem to affect nitrogen fixation of either species. Regarding bloom formation, the results call attention to the importance of the omnipresence, eurythermal growth and deeper vertical positioning of A. flos-aquae in comparison to N. spumigena. N. spumigena is able to form and sustain bloom biomasses relying on cellular phosphorus storage and effective remineralization of organic phosphorus compounds.

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Section: Discussionsupporting

confidence: 78%

Use of different phosphorus sources by the bloom-forming cyanobacteria Aphanizomenon flos-aquae and Nodularia spumigena

Vahtera¹,

Laamanen²,

Rintala³

2007

Aquat. Microb. Ecol.

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“…For instance, bacteria may accumulate polyphosphates in the presence of excess orthophosphate (e.g., Kromkamp 1987), but Ppi and pore water SRP concentrations were not correlated in our study sites (P ϭ 0.74, n ϭ 9) ( Table 1). In addition, a fertilized plot (FSM) in the pristine North Inlet estuary that was fertilized with (NH 4 ) 2 HPO 4 did not accumulate Ppi to detectable levels, even though the pore water SRP concentration at this site was similar to that at the SM site on the urbanized Cooper River estuary (Table 1).…”

Section: Bioavailability Of Ppi-mentioning

confidence: 93%

Occurrence and ecological implications of pyrophosphate in estuaries

Sundareshwar

Morris

Pellechia

et al. 2001

Limnology & Oceanography

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Loading of bioavailable phosphorus, traditionally measured as soluble reactive phosphorus (SRP), contributes to the eutrophication of aquatic ecosystems. However, polyphosphates are also bioavailable but escape detection by the standard method used for measuring SRP. 31P nuclear magnetic resonance spectrometric analysis of sediment extracts and enzymatic assay of surface waters reveal heretofore unreported presence of pyrophosphate (Ppi) in coastal wetlands. We show that the accumulation of Ppi (the smallest chemical form of polyphosphate) in coastal wetlands is related to human impact and can occur in quantities that exceed that of SRP. We further demonstrate that Ppi is readily utilized by microbes in coastal wetland sediments in the presence of nitrogen and carbon and can serve as a reservoir of orthophosphate. Thus, Ppi accumulation in estuaries will subsidize the in situ biogeochemical phosphorus cycle. This has important ecological implications for trophic responses and estuarine productivity.

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“…His results may have been skewed, however, by normalizing cell nutrient contents to total carbon under conditions where large changes in polysaccharide content would be expected. Therefore, in this study 1 placed emphasis on a general principle that has emerged from the evaluation of physiological indicators for nutrient limitation: nutrient-limited cells express high maximal uptake rates ( vmax) for the limiting nutrient and have low cellular contents of the storage form of the nutrient (Kromkamp 1987).…”

Section: Discussionmentioning

confidence: 99%

Metalimnetic cyanobacteria in hard‐water lakes: Buoyancy regulation and physiological state

Konopka

1989

Limnology & Oceanography

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During summer stratification, Crooked and Little Crooked Lakes, Indiana, contained phytoplankton dominated by populations ofAphanizomenonj7o.vaquae that stratified in the metalimnion where photon irradiance was 6% of that at the surface. The gas vacuolate Aphanizomenon filaments from Little Crooked Lake lost buoyancy when exposed to irradiances > 100 pmol photons m-2 s-l. If 2 PM KH,PO, was added to the water samples, however, exposure to irradiances >200 pmol photons m -2 s-l was necessary to obtain buoyancy losses. Phosphate also affected the recovery of buoyancy by sinking filaments. Filaments that had lost buoyancy due to incubation in the light recovered it when incubated for 5 h in the dark. Addition of phosphate increased the rate of buoyancy recovery by 50%. The metalimnetic populations had stratified in a zone of relatively low irradiance and inorganic nutrient concentration. The physiological state of the populations was evaluated by determining the kinetic characteristics for phosphate, nitrate, and ammonia uptake and the cellular contents of surplus phosphate and chlorophyll a. On the basis of the premise that cells limited by a particular element will express a high uptake potential for that element, the metalimnetic populations showed characteristics of organisms not limited by the availability of light, phosphorus, or nitrogen.

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Formation and functional significance of storage products in cyanobacteria

Cited by 93 publications

References 81 publications

Use of different phosphorus sources by the bloom-forming cyanobacteria Aphanizomenon flos-aquae and Nodularia spumigena

Use of different phosphorus sources by the bloom-forming cyanobacteria Aphanizomenon flos-aquae and Nodularia spumigena

Occurrence and ecological implications of pyrophosphate in estuaries

Metalimnetic cyanobacteria in hard‐water lakes: Buoyancy regulation and physiological state

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