Growth and special structures production of Nostoc paludosum (Nostocaceae, Cyanobacteria) under nutrient starvation and different light intensities
The effects of the absence of nitrogen and phosphorus on AA media and three different light intensities (100% Light, 60.0 ± 2.7 μmol m-2 s-1, 50% Light, 30.0 ± 2.7 μmol m-2 s-1, and 13.5% Light, 8.1 ± 2.7 μmol m-2 s-1) on cell production and synthesis of heterocytes and akinetes were determined in a...
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Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)
2018-11-01
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| Series: | Revista Ambiente & Água |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2018000600305&lng=pt&nrm=iso&tlng=en |
| _version_ | 1811287788732022784 |
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| author | Rafael Barty Dextro Fellipe Henrique Martins Moutinho Cristina Souza Freire Nordi |
| author_facet | Rafael Barty Dextro Fellipe Henrique Martins Moutinho Cristina Souza Freire Nordi |
| author_sort | Rafael Barty Dextro |
| collection | DOAJ |
| description | The effects of the absence of nitrogen and phosphorus on AA media and three different light intensities (100% Light, 60.0 ± 2.7 μmol m-2 s-1, 50% Light, 30.0 ± 2.7 μmol m-2 s-1, and 13.5% Light, 8.1 ± 2.7 μmol m-2 s-1) on cell production and synthesis of heterocytes and akinetes were determined in a strain of Nostoc paludosum. In the experiment concerning the absence of nutrients, significant variations were observed between the control group and the groups with absence of nutrients, especially in cell numbers and in synthesis of heterocytes and akinetes. The absence of nitrogen boosted the formation of heterocytes and the absence of phosphorus produced the most akinetes. As for the different light conditions, the growth curves determined for each treatment showed that cell synthesis is slightly affected by the reduction of illuminance. The different light intensities are capable of reducing the maximum growth rates of Nostoc paludosum, with 13.5% light restriction being the most effective on limiting the cell growth rate and inducing the formation of akinetes. The synthesis of heterocyte does not seem directly correlated to light intensity, being better explained by nutritional factors. The data found contributes to the understanding of some of the factors involving growth and synthesis of special structures in Nostoc paludosum. |
| first_indexed | 2024-04-13T03:24:36Z |
| format | Article |
| id | doaj.art-ede6f20e30f949888ec2ea649ed903df |
| institution | Directory Open Access Journal |
| issn | 1980-993X |
| language | English |
| last_indexed | 2024-04-13T03:24:36Z |
| publishDate | 2018-11-01 |
| publisher | Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi) |
| record_format | Article |
| series | Revista Ambiente & Água |
| spelling | doaj.art-ede6f20e30f949888ec2ea649ed903df2022-12-22T03:04:41ZengInstituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)Revista Ambiente & Água1980-993X2018-11-0113611610.4136/ambi-agua.2191Growth and special structures production of Nostoc paludosum (Nostocaceae, Cyanobacteria) under nutrient starvation and different light intensitiesRafael Barty Dextro0Fellipe Henrique Martins Moutinho1Cristina Souza Freire Nordi2Universidade Federal de São Carlos (UFSCar), São Carlos, SP, Brasil Departamento de Botânica (DB). Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brasil Departamento de Ecologia (DE). Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brasil Departamento de Ecologia (DE). The effects of the absence of nitrogen and phosphorus on AA media and three different light intensities (100% Light, 60.0 ± 2.7 μmol m-2 s-1, 50% Light, 30.0 ± 2.7 μmol m-2 s-1, and 13.5% Light, 8.1 ± 2.7 μmol m-2 s-1) on cell production and synthesis of heterocytes and akinetes were determined in a strain of Nostoc paludosum. In the experiment concerning the absence of nutrients, significant variations were observed between the control group and the groups with absence of nutrients, especially in cell numbers and in synthesis of heterocytes and akinetes. The absence of nitrogen boosted the formation of heterocytes and the absence of phosphorus produced the most akinetes. As for the different light conditions, the growth curves determined for each treatment showed that cell synthesis is slightly affected by the reduction of illuminance. The different light intensities are capable of reducing the maximum growth rates of Nostoc paludosum, with 13.5% light restriction being the most effective on limiting the cell growth rate and inducing the formation of akinetes. The synthesis of heterocyte does not seem directly correlated to light intensity, being better explained by nutritional factors. The data found contributes to the understanding of some of the factors involving growth and synthesis of special structures in Nostoc paludosum.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2018000600305&lng=pt&nrm=iso&tlng=enLimnologymicrobiologynostocales |
| spellingShingle | Rafael Barty Dextro Fellipe Henrique Martins Moutinho Cristina Souza Freire Nordi Growth and special structures production of Nostoc paludosum (Nostocaceae, Cyanobacteria) under nutrient starvation and different light intensities Revista Ambiente & Água Limnology microbiology nostocales |
| title | Growth and special structures production of Nostoc paludosum (Nostocaceae, Cyanobacteria) under nutrient starvation and different light intensities |
| title_full | Growth and special structures production of Nostoc paludosum (Nostocaceae, Cyanobacteria) under nutrient starvation and different light intensities |
| title_fullStr | Growth and special structures production of Nostoc paludosum (Nostocaceae, Cyanobacteria) under nutrient starvation and different light intensities |
| title_full_unstemmed | Growth and special structures production of Nostoc paludosum (Nostocaceae, Cyanobacteria) under nutrient starvation and different light intensities |
| title_short | Growth and special structures production of Nostoc paludosum (Nostocaceae, Cyanobacteria) under nutrient starvation and different light intensities |
| title_sort | growth and special structures production of nostoc paludosum nostocaceae cyanobacteria under nutrient starvation and different light intensities |
| topic | Limnology microbiology nostocales |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2018000600305&lng=pt&nrm=iso&tlng=en |
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