The effect of cheats on siderophore diversity in Pseudomonas aeruginosa.
The effect of cheats on siderophore diversity in Pseudomonas aeruginosa.
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DOI：
10.1111/jeb.13307
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发表时间：
2018-09
影响因子：
2.1
通讯作者：
Buckling A
中科院分区：
文献类型：
--
作者：
Stilwell P;Lowe C;Buckling A
如果合作行为优先针对其他合作的个人，就可以维持合作。基于标签的合作(绿胡子)--合作使与参与者具有相同标签的个人受益--是实现这一点的一种方式。基于标签的合作可能会被维护特定标签但不合作的个人利用，而选择逃避这种利用可能导致标签多样性的进化。我们使用机会致病菌铜绿假单胞菌产生的清除铁的吡哆醇作为模型系统，测试了对作弊介导的标签多样性进化至关重要的关键预测。使用两个产生不同类型的吡哆醇的菌株及其各自的作弊行为，我们证明了作弊者的竞争能力超过了他们的同源吡喃生产者，但在良好的混合环境中被异源生产者所击败。因此，共接种两种类型的吡喃丹产生菌和一种类型的吡哆醇作弊菌株，使不存在作弊行为的吡哆醇产生菌具有较大的适应优势。理论表明，在这种交互中，作弊可以在空间结构的环境中保持标签的多样性，但在混合良好的种群中，无论标签的多样性如何，基于标签的合作都将丢失。我们看到，当所有的吡虫啉生产者和作弊者在混合良好的环境中共接种时，这两种类型的吡虫啉生产者都处于劣势，而空间结构(琼脂平板和堆肥微宇宙)非但没有保持多样性，反而导致了一种吡虫啉生产者的统治地位。这些结果表明，作弊在吡喃类化合物多样性进化中的作用可能比预测的要有限。
Cooperation can be maintained if cooperative behaviours are preferentially directed towards other cooperative individuals. Tag‐based cooperation (greenbeards) – where cooperation benefits individuals with the same tag as the actor – is one way to achieve this. Tag‐based cooperation can be exploited by individuals who maintain the specific tag but do not cooperate, and selection to escape this exploitation can result in the evolution of tag diversity. We tested key predictions crucial for the evolution of cheat‐mediated tag diversity using the production of iron‐scavenging pyoverdine by the opportunistic pathogen, Pseduomonas aeruginosa as a model system. Using two strains that produce different pyoverdine types and their respective cheats, we show that cheats outcompete their homologous pyoverdine producer, but are outcompeted by the heterologous producer in well‐mixed environments. As a consequence, co‐inoculating two types of pyoverdine producer and one type of pyoverdine cheat resulted in the pyoverdine type whose cheat was not present having a large fitness advantage. Theory suggests that in such interactions, cheats can maintain tag diversity in spatially structured environments, but that tag‐based cooperation will be lost in well‐mixed populations, regardless of tag diversity. We saw that when all pyoverdine producers and cheats were co‐inoculated in well‐mixed environments, both types of pyoverdine producers were outcompeted, whereas spatial structure (agar plates and compost microcosms), rather than maintaining diversity, resulted in the domination of one pyoverdine producer. These results suggest cheats may play a more limited role in the evolution of pyoverdine diversity than predicted.
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影响因子：
64.8
作者：
Jansen, VAA;van Baalen, M
通讯作者：
van Baalen, M
影响因子：
3.2
作者：
HOHNADEL, D;MEYER, JM
通讯作者：
MEYER, JM
影响因子：
3.2
作者：
Baysse, C;Meyer, JM;Cornelis, P
通讯作者：
Cornelis, P
影响因子：
2
作者：
HAMILTON, WD
通讯作者：
HAMILTON, WD
影响因子：
16.6
作者：
Butaitė E;Baumgartner M;Wyder S;Kümmerli R
通讯作者：
Kümmerli R