A manual of concise descriptions of North American ectomycorrhizae

Goodman, Doug; Durall, Dan; Trofymow, T.; Berch, Shannon M.

doi:10.1007/s005720050212

Cited by 67 publications

(60 citation statements)

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“…Se observaron características morfológicas del tamaño, color, arquitectura, presencia de hifas remanentes y rizomorfos según metodología descrita por Goodman et al (1996). Ante la presencia de morfotipos no descritos previamente (Barroetaveña 2004, Barroetaveña et al 2005, se realizaron preparados microscópicos en agua para evaluar las microestructuras: características de la red de Hartig y del manto, forma y dimensiones de las hifas, presencia y tipo de septos y concreciones de cristales sobre las paredes u ornamentaciones (Agerer 1994(Agerer , 2001.…”

Section: Métodosunclassified

Evaluación del estado micorrícico de plántulas de Pinus ponderosa producidas bajo fertirriego, sin manejo de la micorrización

Salomón¹,

Rajchenberg

Barroetaveña

2009

Bosque (Valdivia)

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SUMMARYSeveral reports of tree planters from the Patagonian Andes region of Chubut (Argentina) have pointed out that seedlings of Pinus ponderosa, obligate ectotrophic species, produced in greenhouses with high levels of fertilization without ectomycorrhizal inoculum applications, showed low or null ectomycorrhizal infection at the end of nursery stage but had excellent performance in plantation sites during the first years. This study was planned to evaluate if those seedlings develop mycorrhizal associations once installed in plantations, and if those associations are originated from inoculums acquired in the nursery. Three evaluations were done: 1) analyses of seedlings at the end of nursery period, to evaluate their initial mycorrhizal condition, 2) analyses after 6 month, with seedlings transplanted into pots with semi-sterile substrate, to establish if there exists inoculum in the system that did not express because of the high fertilization levels and, 3) analyses after 24 month, with seedlings planted in a field distant from any source of ectomycorrhizal inoculum, to evaluate the associations developed in the planting site. Results showed that: 1) the studied nursery produced seedlings with null or very low levels of mycorrhization, with low morphotypes' richness; 2) seedlings showed very high mycorrhizal percentages after 6 months (under greenhouse conditions) and after 24 months (in field conditions); 3) different mycorrhizal fungi behave differently under fertilization. The analyzed nursery fortuitously incorporated mycorrhizal inoculum that rapidly colonized seedlings, immediately after fertilization was interrupted. This fact demonstrates that the hypothesis that ponderosa pine seedlings can establish and grow in anectotrophic environments without EM symbioses is false.Key words: inoculum, nursery, mycorrhizas, Patagonia. RESUMENRepetidos reportes de plantadores de la zona cordillerana del Chubut (Argentina) han señalado que las plántulas de Pinus ponderosa, especie ectotrófica obligada, producidas bajo invernáculo con fertirriego y sin aplicación de inoculantes ectomicorrícicos, que presentaban baja o nula infección ectomicorrícica al terminar la etapa de vivero, mostraron excelentes comportamientos en los sitios de plantación durante los primeros años. Por ello, se planteó este estudio con el objetivo de constatar si las plántulas allí producidas desarrollan asociaciones micorrícicas una vez llevadas a plantación, y si éstas se originan a partir de inóculo adquirido en el vivero. Para ello, se realizaron tres evaluaciones de las plántulas: 1) al salir del vivero de producción acelerada, para constatar el estado micorrícico inicial, 2) después de seis meses de crecimiento luego de un trasplante a macetas con sustrato semi-estéril, para constatar si existía inóculo en el sistema que no se expresaba por el fertirriego, y 3) después de 24 meses luego de implantadas en un predio alejado de cualquier fuente de inóculo ectomicorrícico, para constatar el tipo de asociaciones formadas en el sitio de planta...

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Section: Métodosunclassified

Evaluación del estado micorrícico de plántulas de Pinus ponderosa producidas bajo fertirriego, sin manejo de la micorrización

Salomón¹,

Rajchenberg

Barroetaveña

2009

Bosque (Valdivia)

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“…외생 균근을 형성하는 대부분의 균류는 담자균류에 속하지만 일 부 자낭균류도 외생균근을 형성하는 것으로 알려져 있다 [2]. 외생균근균은 식물 뿌리 내부의 피층 세포 사이에 Hartig net이라는 망상구조의 균사형태를 가지고 있으며, 뿌리 외부에는 균투(mantle)를 형성하는데 [1], 균투는 기주 식물 과 외생균근균의 종류에 따라 분지 형태, 색깔, 표면의 상 태 및 균사의 형태 등이 매우 다양하며 균투의 형태적 특성 에 따라 외생균근을 분류하기도 한다 [3,4]. 외생균근균은 기주 식물과 상리 공생 관계를 통해 광합성 산물을 제공받 는 대신, 식물의 무기 양분과 수분의 흡수 효율을 높이고 뿌리 병원균이나 환경 스트레스에 대한 내성을 증가시킴으 로서 기주 식물의 생장을 돕는다 [5].…”

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Community Changes of Ectomycorrhizal Fungi by Thinning in a Forest of Korea

Choi

Lee²,

Eo³

et al. 2014

The Korean Journal of Mycology

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: This study was conducted to investigate the effect of thinning on ectomycorrhizal fungal communities in a forest. Ectomycorrhizal root tips were collected from forest soils in thinning and non-thinning sites and identified using morphological characteristics and molecular analysis of ITS rDNA sequences. As a result, species richness of ectomycorrhizal fungi was significantly increased and ectomycorrhizal fungal community composition was changed by thinning. These results suggest that forest management such as thinning, could be an important factor affecting mutualistic relationships and belowground microorganisms in forest ecosystems.

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“…Although accurate characterization of ectomycorrhizas takes time to leam (Dahlberg, 2001), macroscopic characteristics of ectomycorrhizas, such as shape, texture and colour, as well as microscopic features such as the presence of emanating hyphae, mantle, and rhizomorphs, can all aid in fungal identification (Agerer, 1987(Agerer, -2000Ingleby et al, 1990;Goodman et al, 1996). Fungal diversity can be accurately assessed using detailed morphological descriptions and this assessment can provide a valuable basis for further molecular investigations .…”

Section: Microscopy and Ectomycorrhlza Characterizationmentioning

confidence: 99%

The ectomycorrhizal associations of Larix laricina (Du Roi) (tamarack) K. Koch and Betula glandulosa Michaux (scrub birch) seedlings in peatlands of central British Columbia.

Catherall¹

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A manual of concise descriptions of North American ectomycorrhizae

Cited by 67 publications

References 0 publications

Evaluación del estado micorrícico de plántulas de Pinus ponderosa producidas bajo fertirriego, sin manejo de la micorrización

Evaluación del estado micorrícico de plántulas de Pinus ponderosa producidas bajo fertirriego, sin manejo de la micorrización

Community Changes of Ectomycorrhizal Fungi by Thinning in a Forest of Korea

The ectomycorrhizal associations of Larix laricina (Du Roi) (tamarack) K. Koch and Betula glandulosa Michaux (scrub birch) seedlings in peatlands of central British Columbia.

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