Siderophore cooperation of the bacterium Pseudomonas fluorescens in soil.

Siderophore cooperation of the bacterium Pseudomonas fluorescens in soil.
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DOI:
10.1098/rsbl.2014.0934
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发表时间:
2015-02
期刊:
影响因子:
3.3
通讯作者:
Buckling A
Buckling A
中科院分区:
生物学2区
文献类型:
--
作者:
Luján AM;Gómez P;Buckling A

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虽然社会相互作用在细菌铁载体的体外进化中发挥了重要作用,但在自然种群中,铁载体的生产在多大程度上是一种社会特征尚不清楚。在这里,我们证明了铁载体在荧光假单胞菌的自然物理环境中扮演着公共产品的角色:土基堆肥。我们表明,铁载体生产者的单一培养在土壤中比非生产者生长得更好,但非生产者可以利用其他人的铁载体,正如非生产者在罕见时入侵生产者人口的能力所表明的那样。尽管有这种罕见的优势,但非生产者无法胜过生产者,这表明生产者和非生产者可能在土壤中稳定共存。据预测,这种共存是由与土壤相关的空间结构引起的,而当非生产者在摇动的土壤-水混合物中种植时,这一点得到了增强的适应性的支持。我们的结果表明,生产者和非生产者都应该在土壤中观察到,就像在海洋环境和临床人口中观察到的那样。
While social interactions play an important role for the evolution of bacterial siderophore production in vitro, the extent to which siderophore production is a social trait in natural populations is less clear. Here, we demonstrate that siderophores act as public goods in a natural physical environment of Pseudomonas fluorescens: soil-based compost. We show that monocultures of siderophore producers grow better than non-producers in soil, but non-producers can exploit others' siderophores, as shown by non-producers' ability to invade populations of producers when rare. Despite this rare advantage, non-producers were unable to outcompete producers, suggesting that producers and non-producers may stably coexist in soil. Such coexistence is predicted to arise from the spatial structure associated with soil, and this is supported by increased fitness of non-producers when grown in a shaken soil–water mix. Our results suggest that both producers and non-producers should be observed in soil, as has been observed in marine environments and in clinical populations.
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影响因子: 4.9
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