Occurrence and intensity of mycorrhizal infections in cultivated orchids in some New Zealand nurseries

Bagyaraj, D. J.; Powell, Conway Ll.

doi:10.1080/00288233.1983.10427052

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…The influence of plant age on colonization may be more pronounced than that of location. In New Zealand nurseries, orchid hybrids cultivated for 5–20 years showed higher mycorrhizal colonization rates than those cultivated for 2–15 months [ 9 ]. Mature plants likely have a longer period to establish a mycorrhizal association than young seedlings, and their larger and more developed root systems enable colonization by mycorrhizal fungi.…”

Section: Discussionmentioning

confidence: 99%

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Orchid Mycorrhizal Association of Cultivated Dendrobium Hybrid and Their Role in Seed Germination and Seedling Growth

Chamara,

Miyoshi,

Yukawa

et al. 2024

Microorganisms

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Orchids are crucial for the horticulture industry. Mycorrhizal fungi benefit crops by improving nutrition, plant growth, and disease resistance. However, the mycorrhizal association of horticultural hybrid orchids is poorly understood. To address this, we investigated mycorrhizal colonization in the entire root system and assessed the mycorrhizal community using a Dendrobium cultivar, D. Stardust ‘Firebird’, obtained from three nurseries. Additionally, we isolated and tested mycorrhizal fungi in symbiotic culture to assess their role in the seed germination and growth of Dendrobium species. All plants were colonized by mycorrhizal fungi, with a higher colonization rate in mature than in juvenile plants. Molecular identification of mycorrhizal fungi by Sanger and high-throughput sequencing revealed that the cultivar was associated with a phylogenetically diverse group of fungi, including mycorrhizal fungi from Tulasnellaceae, and several wood-decaying fungi. The Tulasnellaceae isolates significantly enhanced the seed germination of three Dendrobium species and increased the survival rate and growth of asymbiotic seedlings of D. moniliforme. This study is the first comprehensive examination of mycorrhizal associations in horticultural orchid hybrids, providing valuable insights for commercial production.

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Section: Discussionmentioning

confidence: 99%

“…Partial mycorrhizal colonization has been observed in multiple orchid cultivars in nurseries in New Zealand [ 9 ] and Singapore [ 10 ]. However, previous studies examined only a few aspects of root length and number; the overall colonization rates of whole root systems are unknown.…”

Section: Introductionmentioning

confidence: 99%

Orchid Mycorrhizal Association of Cultivated Dendrobium Hybrid and Their Role in Seed Germination and Seedling Growth

Chamara,

Miyoshi,

Yukawa

et al. 2024

Microorganisms

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Orchidoid Mycorrhiza and Techniques To Investigate

Vij

Lakhanpal

Gupta

2002

Techniques in Mycorrhizal Studies

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Distribución de la colonización micorrízica en las raíces de la orquídea Neotropical <i>Laelia furfuracea</i>Lindl.

García-Sánchez,

Perez-Moreno,

Almaraz-Suárez

et al. 2023

Caldasia

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Laelia furfuracea Lindl., es una orquídea epífita endémica de México, de la cual no existen referencias sobre su interacción con los simbiontes micorrízicos orquidoides. Esta orquídea es recolectada en grandes cantidades, debido a la belleza de sus flores, por lo que existe el riesgo de una disminución dramática de sus poblaciones naturales. En este estudio se evaluó la frecuencia de colonización de las raíces y la influencia de los factores edad y cercanía con el centro del pseudobulbo de plantas recolectadas en un bosque de pino-encino, en Santa Catarina Estetla, Oaxaca, México. Las raíces se clasificaron por edades, jóvenes, maduras y senescentes, y cada una de ellas se dividió en tres segmentos: proximal, central y distal, respecto a la parte basal central del pseudobulbo. Se evaluaron 1650 cortes transversales, los cuales se montaron en portaobjetos y se tiñeron para su observación con microscopía óptica. Se observó que las raíces de la orquídea establecen micorrizas en sus células corticales. La frecuencia de colonización se registró en los segmentos de raíces maduras y el área distal de las raíces senescentes, con valores superiores a 30 %. En contraste, en el caso de las raíces jóvenes, la colonización micorrízica no superó el 1 %, independientemente del segmento evaluado. Este es el primer reporte que demuestra la colonización micorrízica en L. furfuracea y que la frecuencia de colonización es influenciada por la edad de las raíces y por su cercanía con la parte central del pseudobulbo de las plantas de esta especie.

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Occurrence and intensity of mycorrhizal infections in cultivated orchids in some New Zealand nurseries

Cited by 3 publications

References 5 publications

Orchid Mycorrhizal Association of Cultivated Dendrobium Hybrid and Their Role in Seed Germination and Seedling Growth

Orchid Mycorrhizal Association of Cultivated Dendrobium Hybrid and Their Role in Seed Germination and Seedling Growth

Orchidoid Mycorrhiza and Techniques To Investigate

Distribución de la colonización micorrízica en las raíces de la orquídea Neotropical <i>Laelia furfuracea</i>Lindl.

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