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  • Anabaena sp.  (2)
  • luxury storage  (1)
  • 1
    Electronic Resource
    Electronic Resource
    A comparative study of microalgae isolated from flooded rice paddies: light-limited growth, C fixation, growth efficiency and relative N and P requirement (1991)
    Springer
    Journal of applied phycology 3 (1991), S. 211-220 
    Details
    ISSN: 1573-5176
    Keywords: light-limited growth ; carbon fixation ; growth efficiency ; N:P ratio ; luxury storage ; rice paddy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Seven unialgal isolates from rice paddies,Ankistrodesmus convolutus, Chlorella sp.,Scenedesmus quadricauda, Frustulia vulgaris, Anabaena sp.,Microcystis aeruginosa andPhormidium mucicola, were investigated for their light-limited growth and photosynthetic characteristics, growth efficiency, and relative requirement for N and P as well as their storage potentials. The maximum growth rate (μmax) ranged from 1.27 to 2.72 d−1 among species. The slope of light-limited growth (αg) showed only small interspecies differences (0.126–0.204 d−1 W−1 m2) except inS. quadricauda (0.092 d−1 W−1 m2). Similarly, the ratio of μmax to αg, Ik(g), varied within a narrow range (8.7–13.9 W m−2) with the exception ofS. quadricauda (19.5 W m−2). The slope of the photosynthetic curve based on chlorophylla (chla), αp(a), was significantly higher in cyanobacteria (0.118–0.189 mg C mg chla −1h−1W−1m2) than in other species (0.070–0.094 mg C mg chla −1h−1W−1m2). The maximum photosynthetic rate based on chla (Pmax(a)) was similar (2.95–3.83 mg C mg chla −1 h−1) with the exception of a high value (6.17 mg C mg chla −1 h−1) inM. aeruginosa. A significant correlation (P〈0.001) existed between αp(a) and Pmax(a). The C-specific maximum photosynthetic rate (Pmax(c)) was inversely correlated to the C/chla ratio. Growth efficiency (μeff), the efficiency to retain photosynthetically-fixed C for growth, showed an interspecies variation ranging from 73–93% and was correlated to the μmax:Pmax(c) ratio. Cyanobacteria exhibited higher efficiency than others. The ratio of Pmax:αp, Ik(p), was higher than Ik(g) by 2.0 to 3.8 times. The optimum N:P ratio, determined as the ratio of minimum cell quotas of N to P (qoN:qoP), showed a wide interspecies variability. It was highest inP. mucicola (54) and lowest inF. vulgaris (10). The maximum storage capacity for excess P and N also varied among species; the maximum capacity for P ranged from 2 to 14 times of its immediate need and the capacity for N varied from 1.2 to 4 times.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00003579
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Nitrogen and carbon fixation byAnabaena sp. isolated from a rice paddy and grown under P and light limitations (1991)
    Springer
    Journal of applied phycology 3 (1991), S. 335-343 
    Details
    ISSN: 1573-5176
    Keywords: nitrogen fixation ; light limitation ; phosphorus limitation ; cyanobacteria ; Anabaena sp. ; rice paddy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Anabaena sp., isolated from a rice paddy, was investigated for its nitrogen fixation as measured by acetylene reduction activity (ARA) in P-limited continuous and light-limited semi-continuous cultures. Growth rate (μ) under P limitation was a function of cell P content (q p). Both the photosynthetic capacity (Pmax) and photosynthetic efficiency (α) increased with μ when expressed per cell, but not per unit chla. The ARA of steady-state cells under P limitation increased with μ and was linearly related to C-fixation rate. This was apparently a consequence of the control of C-fixation by P limitation. In light-limited cells, steady state ARA, both at the culture light intensity and in the dark, increased asymptotically with μ, but the activity in the dark was only about 51% of that in the light. When the light level of steady-state cells grown at a high in intensity was switched to a low level, ARA decreased exponentially with time. Dark ARA activity also showed a similar decline, but at much lower levels. Thus, ARA depended not only on light history, but also immediate photosynthesis. Steady-state ARA at the ambient intensity or in the dark showed a strong correlation with14C-fixation rate. ARA of light-limited cells showed the same light-saturation characteristics as their14C-fixation, with the same initial saturation intensity,I k. The ratios of Pmax to the maximum ARA (ARAmax), and α to the slope of ARA (αara) were identical. A comparison of gross to net photosynthesis and N2 fixation suggested that there was little leakage or excretion of fixed C or N.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00026096
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Nitrogen and carbon fixation byAnabaena sp. isolated from a rice paddy and grown under P and light limitations (1991)
    Springer
    Journal of applied phycology 3 (1991), S. 335-343 
    Details
    ISSN: 1573-5176
    Keywords: nitrogen fixation ; light limitation ; phosphorus limitation ; cyanobacteria ; Anabaena sp. ; rice paddy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Anabaena sp., isolated from a rice paddy, was investigated for its nitrogen fixation as measured by acetylene reduction activity (ARA) in P-limited continuous and light-limited semi-continuous cultures. Growth rate (μ) under P limitation was a function of cell P content (q p). Both the photosynthetic capacity (Pmax) and photosynthetic efficiency (α) increased with μ when expressed per cell, but not per unit chla. The ARA of steady-state cells under P limitation increased with μ and was linearly related to C-fixation rate. This was apparently a consequence of the control of C-fixation by P limitation. In light-limited cells, steady state ARA, both at the culture light intensity and in the dark, increased asymptotically with μ, but the activity in the dark was only about 51% of that in the light. When the light level of steady-state cells grown at a high in intensity was switched to a low level, ARA decreased exponentially with time. Dark ARA activity also showed a similar decline, but at much lower levels. Thus, ARA depended not only on light history, but also immediate photosynthesis. Steady-state ARA at the ambient intensity or in the dark showed a strong correlation with14C-fixation rate. ARA of light-limited cells showed the same light-saturation characteristics as their14C-fixation, with the same initial saturation intensity,I k. The ratios of Pmax to the maximum ARA (ARAmax), and α to the slope of ARA (αara) were identical. A comparison of gross to net photosynthesis and N2 fixation suggested that there was little leakage or excretion of fixed C or N.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02392887
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
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