Signal beyond nutrient, fructose, exuded by an arbuscular mycorrhizal fungus triggers phytate mineralization by a phosphate solubilizing bacterium.
Signal beyond nutrient, fructose, exuded by an arbuscular mycorrhizal fungus triggers phytate mineralization by a phosphate solubilizing bacterium.
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丛枝菌根真菌分泌的营养物质果糖之外的信号触发解磷细菌的植酸盐矿化
DOI：
10.1038/s41396-018-0171-4
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发表时间：
2018-10
期刊：
影响因子：
--
通讯作者：
Declerck S
中科院分区：
文献类型：
--
作者：
Zhang L;Feng G;Declerck S
合作是自然界普遍存在的现象，合作如何产生和维持是生态学的一个基本问题。人们已经做出了许多努力来理解同一物种中个体之间的合作，而不同物种之间的合作机制却知之甚少。在严格的离体培养条件下，研究了碳磷交换是否对丛枝菌根真菌（AMF）、不规则根噬菌（Rhizophagus irregularisand）和溶磷菌（PSB）水拉子菌（Rahnella aquatilis）之间的合作起关键作用。我们观察到，AMF分泌的果糖通过调节其蛋白质分泌系统，刺激了细菌中磷酸酶基因的表达以及磷酸酶释放到生长培养基中的速度。磷酸酶活性随后增加，促进有机磷（即植酸盐）矿化为无机磷，同时刺激AMF吸收磷的过程。我们的研究结果首次证明了果糖不仅是碳源，而且作为信号分子触发细菌介导的有机磷矿化过程。这些结果突出了菌丝渗出液在AMF与细菌合作中发挥作用的分子机制。
Cooperation is a prevalent phenomenon in nature and how it originates and maintains is a fundamental question in ecology. Many efforts have been made to understand cooperation between individuals in the same species, while the mechanisms enabling cooperation between different species are less understood. Here, we investigated under strict in vitro culture conditions if the exchange of carbon and phosphorus is pivotal to the cooperation between the arbuscular mycorrhizal fungus (AMF)Rhizophagus irregularisand the phosphate solubilizing bacterium (PSB)Rahnella aquatilis. We observed that fructose exuded by the AMF stimulated the expression of phosphatase genes in the bacterium as well as the rate of phosphatase release into the growth medium by regulating its protein secretory system. The phosphatase activity was subsequently increased, promoting the mineralization of organic phosphorus (i.e., phytate) into inorganic phosphorus, stimulating simultaneously the processes involved in phosphorus uptake by the AMF. Our results demonstrated for the first time that fructose not only is a carbon source, but also plays a role as a signal molecule triggering bacteria-mediated organic phosphorus mineralization processes. These results highlighted the molecular mechanisms by which the hyphal exudates play a role in maintaining the cooperation between AMF and bacteria.
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影响因子：
2.6
作者：
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通讯作者：
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作者：
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通讯作者：
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