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.
复制标题

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
复制
发表时间:
2009
影响因子:
2.1
通讯作者:
Hartmann M
Hartmann M
中科院分区:
生物学4区
文献类型:
--
作者:
Hartmann M

文献摘要

参考文献

被引文献

相似文献

公海中单个溶解氨基酸的生物有效浓度通常<1 nM。尽管如此,氨基酸的微生物周转通常以小时为单位来衡量,表明需求量很大。据认为,大部分吸收是由浮游细菌引起的,尽管原生生物,特别是光养原生生物,也预计会吸收氨基酸。为了评估原生生物在亚纳摩尔浓度下与原核生物竞争氨基酸的能力,我们使用流式细胞术细胞分选检查了光养纳米鞭毛虫(草藻类、深海藻类和海藻类)和相关细菌对 3 H-亮氨酸的直接摄取。与 3 H-亮氨酸同化细菌共生体相比,所研究的六种纳米鞭毛虫均未表现出可测量的 3 H-亮氨酸直接吸收,这表明所研究的光养原生生物无法利用天然海洋浓度下溶解的 3 H-亮氨酸。更实际的是,流式分选技术可以快速、明确地区分混合微生物群体中原核细胞和真核细胞之间的有机氮吸收,从而减少建立和维持无菌藻类培养物的需要。
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.
鞭毛蕨单胞菌对弧菌细菌蛋白质生物量的同化效率:使用流式细胞术分选进行评估。
DOI: 10.1016/j.femsec.2005.04.001
发表时间: 2005
影响因子: 4.2
作者:
M. Zubkov;M. Sleigh
通讯作者: M. Sleigh
南极微藻的异养性和光异养性:氨基酸和葡萄糖的光依赖性结合 1
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
在光照和黑暗条件下用氨基酸、葡萄糖、碳酸氢盐和磷酸盐放射性标记的大小分级海洋浮游生物的代谢抑制
DOI: --
发表时间: 1985
期刊: Microbial Ecology
影响因子: 3.6
作者:
William K. W. Li;P. Dickie
通讯作者: P. Dickie
DOI: 10.3354/meps006213
发表时间: 1981-01-01
影响因子: 2.5
作者:
AZAM, F;HODSON, RE
通讯作者: HODSON, RE