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首页> 外文期刊>Aspects of Applied Biology >Spatial and temporal dynamics of the extraradical phase of arbuscular mycorrhizal fungi.
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Spatial and temporal dynamics of the extraradical phase of arbuscular mycorrhizal fungi.

机译:丛枝菌根真菌根外期的时空动态。

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摘要

The dynamics of AMF mycelium and spores were quantified in mesh-exclusion microcosms. In soil, the distance from the host root did not significantly affect the spatial dynamics of AMF biomass (hyphae or spores), with a distance of 12 cm from the host root being uniformly colonised within 1 month. Excision of the host shoot did not significantly affect sporulation and the numbers of spores remained the same for the next 12 weeks. The temporal dynamics of sporulation following excision of the host shoot was also determined in patches of organic fertiliser (farmyard manure, FYM) and field soil. Spore numbers were far higher in FYM than in patches of field soil. Following excision of the host shoot the number of spores dramatically decreased in both patches; however in FYM this was followed by a significant increase in spore numbers, suggesting a capability for non-symbiotic sporulation. This finding provides important insights into the nature of AMF sporulation in organic-rich patches and the consequent impacts for agronomic management.
机译:AMF菌丝体和孢子的动力学在网格排斥微观世界中进行了量化。在土壤中,距宿主根的距离不会显着影响AMF生物量(菌丝或孢子)的空间动力学,距宿主根12厘米的距离在1个月内被均匀定殖。寄主芽的切除没有显着影响孢子形成,并且在接下来的12周中孢子的数量保持不变。还确定了在有机肥块(农家肥,FYM)和田间土壤中除去芽后的孢子形成的时间动态。 FYM中的孢子数量远高于田间土壤。切除宿主芽后,两个斑块中的孢子数量均显着减少。然而,在FYM中,孢子数量显着增加,表明具有非共生孢子形成能力。该发现为富含有机物的斑块中AMF孢子形成的性质及其对农艺管理的影响提供了重要见解。

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