Polyphosphate Containing Particles of Blue-Green Algae

Talpasayi, E. R. S.

doi:10.1508/cytologia.28.76

Cited by 35 publications

(10 citation statements)

References 2 publications

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“…T h e absence of polyphosphate and accumulation of cyanophycin and carbon reserves (i.e. glycogen and lipid bodies) in .4. circiizalis akinetes reported here concurs with akinetes of .itiabaeiin cjlindrica (Talpasayi 1963), Cjli)zdr-osper,,fL(i)f IUCC LB942 (Madsen-Miller and Lang 1968), .Yostor PCC 7524 (Sutherland et al 19791, Artrrbartiafertilijsi,,ln Reddy 1983a), and ,4pha)zzzo)izeizoii Jos-nqune (Cmiech et al 1988). However, one species, Gloeotrichin echi)zulata Cmiech et al (1984), accumulated cyanophycin, and glycogen but was observed to contain one polyphosphate molecule.…”

Section: Discussionsupporting

confidence: 82%

AKINETE DIFFERENTIATION IN ANABAENA CIRCINALIS (CYANOPHYTA)¹

Dok

Hart

1996

Journal of Phycology

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Three lines of evidence established conclusively that phosphorus limitation triggered akinetes to differentiate in Anabaena circinalis Rabenhorst. First, akinetes differentiated when phosphorus was limited, but not when nitrogen, inorganic carbon, iron, trace elements, or light were limited, or when dissolved oxygen concentration was increased. In the phosphorus limitation experiment, akinetes appeared first in the 0 mg P‐L−1 cultures, and the higher the initial concentration of phosphorus was, the longer it took for akinetes to differentiate. Second, akinete differentiation commenced when Qp fell to the same critical concentration in all cultures. The critical Qp for akinete differentiation in A. circinalis was 0.3‐0.45 pg P·cell−1, and there was no significant difference between cultures grown with 0.6, 0.2, 0.06, or 0 mg P · L−1 (F= 5.48, of = 3, P > 0.05). Similarly, there were no significant differences between P cultures in internal cellular soluble reactive phosphorus (SRP) concentration (F= 0.63, df = 3, P > 0.05) or external SRP per cell in the medium (F= 5.16, df= 3, P > 0.05) when akinete differentiation commenced. Both were between 0.01 and 0.07 pg SRP‐cell−1. A thorough literature search indicates that this information has not been reported previously. The third line of evidence came from electron micrographs, which illustrated that polyphosphate was present in trichomes prior to akinete differentiation but was absent in trichomes with akinetes indicating that phosphorus reserves were depleted when akinetes differentiated. Lipid globules (carbon reserve) and cyanophycin granules (nitrogen reserve) increased in number in trichomes with akinetes, compared to trichomes without akinetes. Thus, the ratio of internal P:C:N was different in trichomes with akinetes compared to trichomes without akinetes and may be important in activating akinete‐differentiating genes.

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Section: Discussionsupporting

confidence: 82%

AKINETE DIFFERENTIATION IN ANABAENA CIRCINALIS (CYANOPHYTA)¹

Dok

Hart

1996

Journal of Phycology

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“…The akinete as a survival cell has a sufficient P pool for germination and the first division but not for subsequent growth (Talpasayi, 1962;Reddy, 1983;van Dok and Hart, 1997). In our experiment, the differences in the total biovolumes of N 2 -fixing cyanobacteria were not significant between "P-enriched" and "P-poor" variants until the 7th day.…”

Section: The Effect Of Phosphorous Concentration On Germination and Smentioning

confidence: 99%

Light-dependent germination and subsequent proliferation of N₂-fixing cyanobacteria in a large shallow lake

Kovács

Tóth

Vörös

2012

Ann. Limnol. - Int. J. Lim.

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-Cyanobacteria are a worldwide group of photosynthetic prokaryotes that can cause nuisance blooms in eutrophic waters. It is generally accepted that their resting cells, akinetes, play an important role in the dispersal, recruitment, initiation of blooms and survival under unfavourable conditions, therefore information on the germination, distribution and abundance of akinetes in natural sediments is essential for understanding the ecology and bloom dynamics of N 2 -fixing cyanobacteria. The present study describes the effect of irradiance on the germination and subsequent growth of N 2 -fixing filamentous cyanobacteria developed from natural akinete stock in sediment of Lake Balaton (Hungary) with varying phosphorous supply. The research focuses on the invasive Cylindrospermopsis raciborskii and Aphanizomenon flos-aquae the most abundant species of this lake. In the experiments, the germination of ten filamentous N 2 -fixing cyanobacteria species was observed. The species assemblages of the germinated cyanobacteria populations showed strong light and phosphorus dependence. Anabaena and Anabaenopsis species became dominant in phosphorous-rich conditions, while in phosphorus-deficient environments Aphanizomenon species and C. raciborskii dominated. Among the germinated filaments we have detected Anabaenopsis cunningtonii and Anabaena compacta, which have not been observed in Lake Balaton previously. Our results suggest that among the filamentous heterocytic cyanobacteria of this shallow lake the invasive C. raciborskii was the best competitor when phosphorus supply and irradiance were low.

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“…Under the light microscope, the polyphosphate granules could be detected as spherical bodies (Drews and Nikolo witz 1957, Ebel et al 1958, Edwards et al 1968. These bodies were basophilic and easily extracted by the acid such as TCA (Talpasayi 1963, Jensen 1968. The most striking characteristic of them is the metachromasy induced by the staining with basic dyes (Ebel and Muller 1958) and the strong dependence to the phosphorous nutrient in growing medium (Tischer 1957).…”

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confidence: 99%

Polyphosphate Body in the Chloroplast of <i>Pogonatum inflexum</i>, Musci

Tanaka

Sato

1977

CYTOLOGIA

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Polyphosphate Containing Particles of Blue-Green Algae

Cited by 35 publications

References 2 publications

AKINETE DIFFERENTIATION IN ANABAENA CIRCINALIS (CYANOPHYTA)¹

AKINETE DIFFERENTIATION IN ANABAENA CIRCINALIS (CYANOPHYTA)¹

Light-dependent germination and subsequent proliferation of N₂-fixing cyanobacteria in a large shallow lake

Polyphosphate Body in the Chloroplast of <i>Pogonatum inflexum</i>, Musci

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Polyphosphate Containing Particles of Blue-Green Algae

Cited by 35 publications

References 2 publications

AKINETE DIFFERENTIATION IN ANABAENA CIRCINALIS (CYANOPHYTA)1

AKINETE DIFFERENTIATION IN ANABAENA CIRCINALIS (CYANOPHYTA)1

Light-dependent germination and subsequent proliferation of N2-fixing cyanobacteria in a large shallow lake

Polyphosphate Body in the Chloroplast of <i>Pogonatum inflexum</i>, Musci

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About

AKINETE DIFFERENTIATION IN ANABAENA CIRCINALIS (CYANOPHYTA)¹

AKINETE DIFFERENTIATION IN ANABAENA CIRCINALIS (CYANOPHYTA)¹

Light-dependent germination and subsequent proliferation of N₂-fixing cyanobacteria in a large shallow lake