Arbuscular mycorrhizae from arid parts of Namibia

Uhlmann, Elisabeth; Görke, Claudia; Petersen, Andreas; Oberwinkler, Franz

doi:10.1016/j.jaridenv.2005.05.002

Cited by 40 publications

(27 citation statements)

References 48 publications

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“…Furthermore, there were also some species that occurred only in particular steppe communities (Table III). Similar results were reported by Eom et al (2001) and Uhlmann et al (2006). It was supposed that different AMF species may have different sensitivities to photosynthate stress (Bethlenfalvay and Dakessian, 1984).…”

Section: Am Fungus Spore Communitiessupporting

confidence: 84%

“…Numerous other studies have shown Glomus to be dominant in arid or semiarid areas (Frank et al, 2003;Ferrol et al, 2004;Shi et al, 2007). G. aggregatum and G. geosporum are also frequently found in arid or semiarid ecosystems (Panwar and Tarafdar, 2006;Shi et al, 2006;Uhlmann et al, 2006). The degraded grassland areas had significantly lower AMF species diversity.…”

Section: Am Fungus Spore Communitiesmentioning

confidence: 84%

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Arbuscular mycorrhizal fungi in degraded typical steppe of inner Mongolia

et al. 2008

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Arbuscular mycorrhizal (AM) fungi may have some potential use in the restoration of degraded grassland through beneficial effects on plant growth and soil quality. A field investigation was conducted in three grassland sites of typical steppe in Inner Mongolia. The three plant communities, one of which was undegraded, one moderately degraded and the third severely degraded, were studied by collecting soil samples and samples of four plant species that occurred in all three sites. The percentage of root length colonized by AM fungi was estimated and the species composition and diversity of AM fungus spores recovered from the soil were determined using spore morphological characteristics. Although differences between the sites may have been due partly to other factors, it is likely that the degree of degradation was an important factor. No decline was found in the AM colonization of the roots of the indicator plant species in the moderately or severely degraded plant communities, and two plant species showed higher colonization status in the two degraded areas. Glomus geosporum and Scutellospora calospora were the dominant AM fungi in the undegraded steppe, while G. geosporum and Glomus aggregatum dominated the two degraded sites which also had low spore densities, species richness and diversity indices. However, different AM species showed different distributions among the three plant communities and the results indicate that both biotic and abiotic factors were important in determining the AMF communities, with biotic factors possibly the more important.

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Section: Am Fungus Spore Communitiessupporting

confidence: 84%

Section: Am Fungus Spore Communitiesmentioning

confidence: 84%

Arbuscular mycorrhizal fungi in degraded typical steppe of inner Mongolia

et al. 2008

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“…A riqueza de espécies (16) foi menor do que tem sido mencionado para outras áreas de Caatinga preservada, nos estados de Alagoas e Pernambuco (Souza et al 2003;Silva et al 2007;), mas supera dados referentes a regiões áridas da Namíbia e da Jordânia, onde apenas 12 e oito espécies de FMA foram identificadas, respectivamente (Uhlmann et al 2006;Mohammad et al 2003). O alto nível de fósforo nas áreas estudadas pode ter influenciado negativamente a ocorrência dos FMA, prejudicando a colonização e a produção de glomerosporos.…”

Section: Resultsunclassified

Diversidade de fungos micorrízicos arbusculares em área de Caatinga, PE, Brasil

et al. 2012

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RESUMO(Diversidade de fungos micorrízicos arbusculares em área de Caatinga, PE, Brasil). O objetivo deste trabalho foi o de determinar a infectividade, a riqueza de FMA e a condição micorrízica da vegetação em área de Caatinga não antropizada. Coleta de solo e raízes foi realizada em Triunfo/PE. Raízes foram examinadas para determinação da colonização micorrízica. O número mais provável (NMP) de propágulos infectivos de FMA foi estimado por diluições sucessivas do solo e a utilização de milho (Zea mays L.) como planta isca. Glomerosporos foram quantificados e preparados em lâminas, para identificação das espécies. As plantas apresentaram-se pouco colonizadas (média < 10%) e o número de glomerosporos foi baixo (< 1 glomerosporo g -1 de solo), como registrado em outras áreas de Caatinga. O NMP de propágulos de FMA variou entre 64 e 70 cm -3 solo, indicando a importância dos outros propágulos (além dos glomerosporos) na dispersão dos FMA. Foram registrados 16 táxons de FMA, dos gêneros Acaulospora, Entrophospora, Gigaspora, Glomus, Kuklospora, Pacispora e Paraglomus; Glomus foi o mais representativo (sete espécies). Pacispora boliviana está sendo relatada pela primeira vez no Brasil. Os elevados teores de P na área provavelmente contribuiram para os baixos valores de colonização, infectividade e riqueza de FMA na área estudada. Confirma-se que os FMA são comuns em solos do semiárido brasileiro, com espécies de Glomus predominando nesse ambiente. Palavra-Chave: Glomeromycota, Ocorrência, Semiárido ABSTRACT(Diversity of arbuscular mycorrizal fungi in an area of Caatinga, PE, Brazil). The objective of this work was to determine the infectivity and richness of AMF and the mycorrhizal conditions of the vegetation in a preserved area of Caatinga. Soil and root samples were taken in two subareas in the municipality of Triunfo, PE. The roots were stained with Trypan blue, and observed with a microscope to determine if colonization of mycorrhizal fungi was present. Glomerospores were extracted from soil, counted, mounted on microscope slides and the AMF species were identified. The plants from the area showed < 10% colonization. The number of glomerospores (<1 g -1 soil) did not differ between the subareas although in one area the amount of P in the soil was three times higher than in the other. The number of AMF propagules varied from 64 to 70 cm -3 in the soil. Sixteen taxa of AMF were registered and Glomus was the most representative genus, with seven species. Pacispora boliviana is reported for the first time in Brazil. The high amount of P probably contributes to the low values of propagules, colonization, infectivity and richness of AMF in the area. AMF have been commonly found in the Brazilian semiarid region and species of Glomus are predominant in this environment.

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“…Al-Garni (2001) reported a wide variation among the samples for spore populations with the field soils and infectivity of AMF with roots from a study on Taif soils and standing crops. On the other hand, several studies reported occurrence and diversity of mycorrhizae in desert plants (Miller, 1979;Rose, 1981;Mejstřík and Cudlín, 1983;Stutz and Morton, 1996;He et al, 2002;Titus et al, 2002;Chaudhry et al, 2006;Panwar and Tarafdar, 2006;Uhlmann et al, 2006) but very few references are available with structural colonization studies and spore population in different countries with desert plants especially from Saudi Arabia.…”

Section: Colonization Rates and Spore Populationmentioning

confidence: 99%