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首页> 外文期刊>Mycologia >Abundance and characteristics of Pisolithus ectomycorrhizas in New Zealand geothermal areas.
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Abundance and characteristics of Pisolithus ectomycorrhizas in New Zealand geothermal areas.

机译：新西兰地热地区Pisolithus dermacorrhizas的丰度和特征。

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摘要

Pisolithus is restricted in New Zealand to geothermal areas where it associates with Kunzea ericoides var. microflora (prostrate kanuka) and occasionally Leptospermum scoparium. Here we describe for the first time the ectomycorrhizal morphotypes of three New Zealand Pisolithus species and report the frequency and abundance of these morphotypes against other mycorrhizal fungi associated with these hosts in New Zealand geothermal areas. The three Pisolithus species form typical ectomycorrhizal associations with Kunzea ericoides var. microflora, and one also was observed forming typical ectomycorrhizal associations with Leptospermum scoparium. Although the morphotypes from the three Pisolithus species share many morphological and anatomical characteristics, they vary with regard to the abundance of rhizomorphs. The common occurrence of Pisolithus fruiting bodies at the geothermal sites was matched by frequent and abundant Pisolithus ectomycorrhizas. Pisolithus ectomycorrhizas were frequent (100% of soil cores) and abundant (between 55 and 88% of ectomycorrhizal tips) associates of prostrate kanuka in hot (50 C at 8 cm depth), highly acidic and N depleted soils. The levels of arbuscular mycorrhizal colonization of prostrate kanuka were lower than on K. ericoides and L. scoparium on cooler soils. The stressful conditions where prostrate kanuka dominates probably favour Pisolithus over the mycorrhizal fungi occurring in cooler geothermal areas. Questions about how several genetically similar Pisolithus species co-occur on prostrate kanuka in geothermal areas without mutual competitive exclusion are discussed.
机译：Pisolithus在新西兰仅限于与Kunzea ericoides var相关的地热地区。菌群（prokan kanuka），偶尔还有Leptospermum scoparium。在这里，我们首次描述了三种新西兰Pisolithus菌种的外生菌根形态，并报告了这些形态对与这些寄主相关的其他菌根真菌在新西兰地热地区的频率和丰度。三种Pisolithus物种与Kunzea ericoides var形成典型的菌根结合。菌群，还观察到一种与稀子乳头菌形成典型的菌根结合。尽管来自三个Pisolithus物种的形态型具有许多形态和解剖学特征，但它们在根状形态的丰度方面却有所不同。地热站点常见的Pisolithus子实体与频繁而丰富的Pisolithus嫁接菌根相匹配。 Pisolithus外生菌根频繁（在土壤核心的100％）和丰富的（在外生菌根尖端的55％到88％之间）在高温，高酸性和N贫乏的土壤（50°C，8°C）下pro伏的kanuka伴生。在较冷的土壤上，鸭strate蒲的丛枝菌根定植水平低于芥菜K. ericoides和L. scoparium。 pro伏的kanuka占主导地位的压力条件可能更倾向于Pisolithus，而不是在较凉爽的地热地区发生的菌根真菌。讨论了关于如何在地热区域的无性卡努卡人中，在没有相互竞争排斥的情况下，共生几种遗传相似的Pisolithus物种的问题。

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