Assessing amino acid uptake by phototrophic nanoflagellates in nonaxenic cultures using flow cytometric sorting.
Assessing amino acid uptake by phototrophic nanoflagellates in nonaxenic cultures using flow cytometric sorting.
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使用流式细胞术分选评估非无菌培养物中光养纳米鞭毛虫的氨基酸摄取。
DOI:
10.1111/j.1574-6968.2009.01715.x
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发表时间:
2009
影响因子:
2.1
通讯作者:
Hartmann M
中科院分区:
文献类型:
--
作者:
Hartmann M
Biologically available concentrations of individual dissolved amino acids in the open ocean are generally <1 nM. Despite this, the microbial turnover of amino acids is usually measured in hours indicating high demand. It is thought that the majority of uptake is due to bacterioplankton, although protists, particularly phototrophic protists, are also expected to take up amino acids. In order to assess the ability of protists to compete with prokaryotes for amino acids at subnanomolar concentrations, we examined the direct uptake of3H-leucine by phototrophic nanoflagellates (prasinophytes, pelagophytes and trebouxiophytes) and by associated bacteria using flow cytometric cell sorting. In contrast to3H-leucine-assimilating bacterial copopulations, none of the six studied nanoflagellates showed measurable direct uptake of3H-leucine, suggesting that the studied phototrophic protists were unable to utilize dissolved3H-leucine at natural oceanic concentrations. More practically, the flow-sorting technique allowed rapid and unequivocal differentiation of organic nitrogen uptake between prokaryotic cells and eukaryotic cells in mixed microbial populations, reducing the need to establish and maintain axenic algal cultures.
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影响因子:
4.2
作者:
M. Zubkov;M. Sleigh
通讯作者:
M. Sleigh
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
R. Rivkin;M. Putt
通讯作者:
M. Putt
DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
R. Rivkin
通讯作者:
R. Rivkin
影响因子:
3.6
作者:
William K. W. Li;P. Dickie
通讯作者:
P. Dickie
影响因子:
2.5
作者:
AZAM, F;HODSON, RE
通讯作者:
HODSON, RE