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首页> 外文期刊>The Science of the Total Environment >Spatiotemporal variation of arbuscular mycorrhizal fungal colonization in olive (Olea europaea L.) roots across a broad mesic-xeric climatic gradient in North Africa
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Spatiotemporal variation of arbuscular mycorrhizal fungal colonization in olive (Olea europaea L.) roots across a broad mesic-xeric climatic gradient in North Africa

机译：橄榄（Olea europaea L.）根系中丛枝菌根真菌定殖的时空变化跨越北非的广泛的中，干气候梯度

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摘要

This study aims to determine the spatiotemporal dynamics of root colonization and spore density of arbuscular mycorrhizal fungi (AMF) in the rhizosphere of olive trees (Olea europaea) with different plantation ages and under different climatic areas in Algeria. Soil and root samples were seasonally collected from three olive plantations of different ages. Other samples were carried out in productive olive orchards cultivated under a climatic gradient (desertic, semi-arid, subhumid, and humid). The olive varieties analysed in this study were Blanquette, Rougette, Chemlel and the wild-olive. Spore density, mycorrhization intensity (M%), spore diversity and the most probable number (MPN) were determined. Both the intensity of mycorrhizal colonization and spore density increased with the increase of seasonal precipitation and decreased with the increase of air temperature regardless of the climatic region or olive variety. The variety Rougette had the highest mycorrhizal levels in all plantation ages and climates. Spore community was composed of the genera Rhizophagus, Funneliformis, Glomus, Septoglomus, Gigaspora, Scutellospora and Entrophospora. The genus Glomus, with four species, predominated in all climate regions. Spores of Gigaspora sp. and Scutellospora sp. were the most abundant in desertic plantations. Statistical models indicated a positive relationship between spore density and M% during spring and winter in young seedlings and old plantations. A significant positive relationship was found between MPN and spore density under different climates. For a mycotrophic species, the rhizosphere of olive trees proved to be poor in my-corrhiza in terms of mycorrhizal colonization and numbers of the infective AMF propagules.
机译：本研究旨在确定阿尔及利亚不同种植年限和不同气候区的橄榄树（Olea europaea）根际中丛枝菌根真菌（AMF）的根部定居和孢子密度的时空动态。从三个不同年龄的橄榄种植园中季节性采集土壤和根样品。其他样品在气候梯度（干旱，半干旱，半湿润和潮湿）下种植的高产橄榄园中进行。在这项研究中分析的橄榄品种为Blanquette，Rougette，Chemlel和野生橄榄。测定孢子密度，菌根强度（M％），孢子多样性和最可能数（MPN）。菌根定植强度和孢子密度均随季节降水的增加而增加，而随气温的升高而减小，而与气候区域或橄榄种类无关。 Rougette品种在所有种植年龄和气候下均具有最高的菌根水平。孢子群落由根瘤菌，漏斗形菌，glomus，Septoglomus，Gigaspora，Scutellospora和Entrophospora属组成。 Glomus属有四个物种，在所有气候区中都占主导地位。 Gigaspora sp。的孢子和Scutellospora sp。是沙漠种植园中最丰富的统计模型表明，春季和冬季幼苗和老人工林中的孢子密度和M％之间呈正相关。在不同气候下，MPN与孢子密度之间存在显着的正相关关系。对于菌种而言，就菌根定殖和感染性AMF繁殖体的数量而言，橄榄树的根际在菌根中证明是差的。

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  • 来源
    《The Science of the Total Environment》 |2017年第1期|176-189|共14页
  • 作者

    Amel Meddad-Hamza; Nabila Hamza; Souad Neffar; Arifa Beddiar; Silvio Gianinazzi; Haroun Chenchouni;

  • 作者单位

    Laboratoire de Biologie Vegetale et Environnement, Department of Biology, Faculty of Sciences, University of Badji Mokhtar, Annaba 23000, Algeria;

    Laboratoire de Biologie Vegetale et Environnement, Department of Biology, Faculty of Sciences, University of Badji Mokhtar, Annaba 23000, Algeria;

    Department of Natural and Life Sciences, Faculty of Exact Sciences and Natural and life Sciences, University of Tebessa, Tebessa 12000, Algeria;

    Laboratoire de Biologie Vegetale et Environnement, Department of Biology, Faculty of Sciences, University of Badji Mokhtar, Annaba 23000, Algeria;

    INOCULUMplus Technopole Agro-Environnement RD31, Breteniere 21110, France;

    Department of Natural and Life Sciences, Faculty of Exact Sciences and Natural and life Sciences, University of Tebessa, Tebessa 12000, Algeria;

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  • 正文语种 eng
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  • 关键词

    Arbuscular mycorrhizal fungi diversity; North-African climates; Olive varieties; Plantation age; Seasonal dynamics;

    机译：丛枝菌根真菌多样性;北部非洲气候;橄榄品种;种植年龄季节动态;

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