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首页> 外文期刊>Plant and Soil >Different soil moisture conditions change the outcome of the ectomycorrhizal symbiosis between Rhizopogon species and Pinus muricata.
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Different soil moisture conditions change the outcome of the ectomycorrhizal symbiosis between Rhizopogon species and Pinus muricata.

机译：不同的土壤水分条件改变了根瘤菌和毛m之间的菌根共生结局。

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摘要

The outcome of species interactions often depends on the environmental conditions under which they occur. In this study, we tested how different soil moisture conditions affected the outcome of the ectomycorrhizal symbiosis between three Rhizopogon species and Pinus muricata in a factorial growth chamber experiment. We found that when grown in 7% soil moisture conditions, ectomycorrhizal plants had similar biomass, photosynthesis, conductance, and total leaf nitrogen as non-mycorrhizal plants. However, when grown at 13% soil moisture, ectomycorrhizal plants had significantly greater shoot biomass, higher photosynthetic and conductance rates, and higher total leaf nitrogen than non-mycorrhizal plants. The differences in plant response by mycorrhizal status in the two soil moisture treatments corresponded with evidence of water limitation experienced by the fungi, which had much lower colonization at 7% compared to 13% soil moisture. Our results suggest that the outcome of the ectomycorrhizal symbiosis can be context-dependent and that fluctuating environmental conditions may strongly affect the way plants and fungi interact..
机译：物种相互作用的结果通常取决于它们发生的环境条件。在这项研究中，我们在阶乘生长室实验中测试了不同的土壤水分条件如何影响三种根瘤菌和毛栗松之间的菌根共生的结果。我们发现，当在7％的土壤湿度条件下生长时，外生菌根植物的生物量，光合作用，电导率和总叶氮与非菌根植物相似。但是，当土壤湿度为13％时，与非菌根植物相比，外生菌根植物的茎生物量明显更高，光合和电导率更高，总叶氮更高。两种土壤水分处理中菌根状态对植物反应的差异与真菌所经历的水分限制的证据相对应，真菌在7％时的定植率要低得多，而在土壤水分中为13％。我们的结果表明，外生菌根共生的结果可能取决于环境，并且不断变化的环境条件可能会强烈影响植物与真菌的相互作用方式。

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