Factors affecting akinete differentiation in Cylindrospermopsis raciborskii (Nostocals, Cyanobacteria)

Moore, D., O'Donohue, M., Garnett, C. M., Shaw, G. R. and Critchley, C. (2005) Factors affecting akinete differentiation in Cylindrospermopsis raciborskii (Nostocals, Cyanobacteria). Freshwater Biology, 50 2: 345-352. doi:10.1111/j.1365-2427.2004.01324.x


Author Moore, D.
O'Donohue, M.
Garnett, C. M.
Shaw, G. R.
Critchley, C.
Title Factors affecting akinete differentiation in Cylindrospermopsis raciborskii (Nostocals, Cyanobacteria)
Journal name Freshwater Biology   Check publisher's open access policy
ISSN 0046-5070
Publication date 2005
Sub-type Article (original research)
DOI 10.1111/j.1365-2427.2004.01324.x
Volume 50
Issue 2
Start page 345
End page 352
Total pages 8
Editor A.G. Hildrew
C.R. Townsend
Place of publication UK
Publisher Blackwell Publishing Ltd
Collection year 2005
Language eng
Subject C1
300199 Soil and Water Sciences not elsewhere classified
770404 Control of pests and exotic species
Abstract 1. Cylindrospermopsis raciborskii is a potentially toxic freshwater cyanobacterium which can produce akinetes (reproductive spores) that on germinating can contribute to future populations. To further understand factors controlling the formation of these specialised cells, the effects of diurnal temperature fluctuations (magnitude and frequency), in combination with different light intensities and phosphorus concentrations were investigated under laboratory conditions. 2. Akinete differentiation was affected by the frequency of temperature fluctuations. Maximum akinete concentrations were observed in cultures that experienced multiple diurnal temperature fluctuations. 3. Akinete concentrations increased with increasing magnitude of temperature fluctuation. A maximum akinete concentration was achieved under multiple diurnal temperature fluctuations with a magnitude of 10degreesC (25degreesC to 15degreesC). 4. A fourfold increase in light intensity (25-100 mumol m(-2) s(-1)) resulted in an approximate 14-fold increase in akinete concentration. 5. High filterable reactive phosphorus (FRP) concentrations (> 70 mug L-1) in the medium, combined with a multiple diurnal temperature fluctuation of 10degreesC, supported the development of the highest akinete concentration.
Keyword Akinete
Cylindrospermopsis Raciborskii
Phosphorus
Temperature
Blue-green-algae
Anabaena-circinalis
Woloszynska Seenaya
Low-temperature
Subba-raju
Sporulation
Queensland
Strain
Bloom
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

 
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Created: Wed, 15 Aug 2007, 05:18:44 EST