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首页> 外文期刊>Plant and Soil >Life-history strategies of arbuscular mycorrhizal fungi determine succession into roots of Rosmarinus officinalis L., a characteristic woody perennial plant species from Mediterranean ecosystems
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Life-history strategies of arbuscular mycorrhizal fungi determine succession into roots of Rosmarinus officinalis L., a characteristic woody perennial plant species from Mediterranean ecosystems

机译：丛枝菌根真菌的生活史策略决定了迷迭香（Rosmarinus officinalis L.）的根系，后者是地中海生态系统中一种典型的多年生木本植物

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摘要

Few studies have analyzed life-history strategies of arbuscular mycorrhizal fungi (AMF), in terms of the different propagule types they produce, and their ability to colonize new seedlings. The aim was to assess whether life-history strategies influence AMF successional dynamics and assemblages. Rosemary (Rosmarinus officinalis L.) seedlings, grown in a mesocosm system, were colonized by either the AMF hyphae coming from a living rosemary plant, or from spores germinating in soil. The AMF community established in the plantlets was monitored every 3 months during 2 years, using terminal restriction fragment length polymorphism of genes coding for rDNA. The two different sources of AMF propagules resulted in a different initial community colonizing rosemary roots. AMF propagating from hyphae attached to living mycorrhizal-roots seemed to colonize faster and were season-dependent. AMF taxa originating from soil-borne propagules were most frequent over time and exhibit the dominant colonization strategy in this system. The evolution of the AMF community also revealed different strategies in succession. AMF associated with rosemary evidenced contrasting life-history strategies in terms of source of inoculum for new colonization and hence survival. The observed successional dynamics of AMF have implications for understanding the ecological processes in Mediterranean environments and seasonality of colonization processes.
机译：很少有研究针对丛枝菌根真菌（AMF）的生活史策略，根据它们产生的不同繁殖体类型以及它们对新苗的定植能力来分析。目的是评估生活史策略是否会影响AMF的继承动力和组合。在中膜系统中生长的迷迭香（Rosmarinus officinalis L.）幼苗被来自活的迷迭香植物的AMF菌丝或土壤中萌发的孢子定植。使用编码rDNA的基因的末端限制性片段长度多态性，在2年内每3个月对小植株中建立的AMF群落进行监测。 AMF繁殖体的两种不同来源导致迷迭香根部定殖的初始群落不同。从附着于活菌根的菌丝繁殖的AMF似乎定植速度更快，并且取决于季节。随着时间的流逝，源自土壤传播繁殖体的AMF分类群最为频繁，并在该系统中表现出主导的定居策略。 AMF社区的发展也相继揭示了不同的策略。与迷迭香相关的AMF在新菌落的接种来源和生存方面证明了相反的生活史策略。观察到的AMF的连续动力学对理解地中海环境中的生态过程和殖民化过程的季节性具有重要意义。

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