An Overview on Orchid Endophytes

Pant, Bijaya; Shah, Sujit; Shrestha, Roshni; Pandey, Sushma; Joshi, Pusp Raj

doi:10.1007/978-3-319-68867-1_26

Cited by 31 publications

(24 citation statements)

References 82 publications

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“…The first non-Rhizoctonia-like genera reported to show a symbiotic role was Fusarium in the orchid Cypripedium reginae (Vujanovic 2000), with significance in seed germination. The known saprophytic fungi Mycena, Trichoderma, and Chaetomium have also been reported to play a specific role in orchid development (Pant et al 2017); all of these genera have been reported in this study. The genus Coprinellus, also saprophytic fungi, was first described as very frequently associated with the terrestrial orchid Epipogium roseum by Yamato et al (2005), they suggest the existence of a highly specific relationship between this orchid species and members of the Psathyrellaceae family, owing to the high abundance of pelotons observed in their roots.…”

Section: Orchid Species Description-pleurothallis Coriacardiasupporting

confidence: 60%

“…Furthermore, some of the isolates, such as those belonging to the Ilyonectria and Coprinellus genera, stimulated seed germination by promoting embryo development in vitro until testa rupture (stage 3). Endophytic fungi colonizing roots of orchids have been reported to have a crucial role in plant propagation, embryo development, seed germination, and protocorm nutrition (Rasmussen et al 2015, Ma et al 2015, Pant et al 2017. For instance, Tolumnia variegata in the presence of Ceratobasidium have a positive influence in seed germination (Otero et al 2005), Epulorhiza spp.…”

Section: Orchid Species Description-pleurothallis Coriacardiamentioning

confidence: 99%

“…However, despite their potential roles as promoters of orchid germination and development, endophytes have rarely been studied (Ma et al 2015). This is striking considering the diversity of this group of microorganisms, containing over 110 genera, and the potential functional roles played by these fungi, among which stand out the promotion of seed germination and protocorm development in plants (Pant et al 2017, Teixeira da Silva et al 2015, Tsavkelova et al 2008.…”

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confidence: 99%

“…commercialization should obey strict commerce regulations (CITES 1992). However, many of these orchid species are extracted from their natural environments and marketed illegally (Jiménez 2014, Pant et al 2017, with only a few companies dedicated to their reproduction for commercial purposes. An effective alternative to avoid illegal extraction of orchids is their controlled propagation for horticultural purposes using germination media enriched with simple sugars and nutrients, such as Phytamax TM and Murashige & Skoog (1962).…”

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confidence: 99%

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Root endophytic fungi promote in vitro seed germination in Pleurothallis coriacardia (Orchidaceae)

et al. 2020

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Seeds of many orchids rely on the presence of fungi to trigger the germination process and even to initiate the full development of protocorms. While attention has been directed towards the study of mycorrhizal fungi, the diversity and functions of endophytic fungi from orchid roots remain underexplored, and few studies have verified their ecological role. This is the case of Pleurothallis coriacardia, an endemic green Neotropical orchid with both epiphytic and lithophytic habits growing in High-Andean montane forests. In the present study, we screened the cultivable fraction of the endophytic fungi colonizing the roots of mature plants of P. coriacardia using ITS rDNA markers. We also tested the potential of these endophytic fungi to improve embryo development and seed germination. Most of the isolated endophytes were classified within Psathyrellaceae. Some isolates, identified as members of the Ilyonectria and Coprinellus genera, significantly promoted embryo development in vitro in P. coriacardia seeds, a result that highlights the ecological roles these endophytic fungi may play in nature. Keywords: Andean montane forest, embryo development, epiphytic orchids, Ilyonectria, lithophytic orchids, Psathryrellaceae

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Section: Orchid Species Description-pleurothallis Coriacardiasupporting

confidence: 60%

Section: Orchid Species Description-pleurothallis Coriacardiamentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Root endophytic fungi promote in vitro seed germination in Pleurothallis coriacardia (Orchidaceae)

et al. 2020

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“…Orchids are the most fascinating group of flowering with immense advantage and shows diversity in distribution (Pant and Raskoti, 2013;Pant et al, 2017). They are mostly found in moist and shady place, some are lithophytes, saprophytic and even terrestrial.…”

Section: Introductionmentioning

confidence: 99%

Identification of endophytic fungi from roots of two Dendrobium species and evaluation of their antibacterial property

Shrestha¹,

Shah²,

Pan³

2018

Afr. J. Microbiol. Res.

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Among all orchids, Dendrobium sp. is considered to have high medicinal value. Dendrobium moniliforme and Dendrobium transparens have immense pharmaceutical, commercial potentiality. However, their fungal endophytes remain unexplored. Isolation and identification of thirteen species of endophytic fungi from the root of D. moniliforme as well as five species from the roots of D. transparens were done. The two endophytic fungi namely Aspergillus flavus and Trichoderma harzianum were common for both plant species. Antimicrobial assay was done against selected human pathogen both gram positive and negative Escherichia coli, Pseudomanas aeruginosa, Staphyllococcus aureus and Staphyllococcus epidermidis. The antimicrobial assay showed the significant role of endophytic fungi to inhibit the bacterial growth. Methanolic extract of DeMon VI and DeMon X were prepared to identify the bioactive compounds. Phenolic and 3-Eicosene,(E)-compounds were identified from extract of DeMon VI whereas Pentadecanoic acid, 14 methyle-, methyl ester and Diethyl Phthalate were identified from extract of DeMon X.

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Diversity of unique, nonmycorrhizal endophytic fungi in cultivated Phalaenopsis orchids: A pilot study

Watkinson,

Winkel

2024

Plant Enviro Interactions

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Orchids comprise one of the largest, most diverse, and most broadly distributed families of flowering plants and contribute significantly to habitat biodiversity. One key aspect of orchid growth and development is the formation of mycorrhizal symbioses with compatible endophytic fungi, which are maintained throughout the life of the plant. Substantial efforts to identify the fungi that form mycorrhizal symbioses across a range of orchid species have often also uncovered numerous nonmycorrhizal, endophytic fungi. These fungi could also have significant effects on orchid growth and development and are beginning to be analyzed more closely, particularly in wild species. The role of endophytic fungi in the production, distribution, and continued growth by the hobbyist of orchids is not known. As an initial step toward characterizing nonmycorrhizal endophytic fungi associated with cultivated orchids, we undertook a survey of fungi residing within roots of Phalaenopsis plants growing in home environments. Sequence analysis of ITS regions amplified from total DNA isolated from roots allowed rapid identification of endophytic fungi to the class level and may offer a useful initial screening method for beneficial species, for example, in horticultural settings. ITS‐PCR sequences subsequently obtained from individual fungi cultured from surface‐sterilized orchid roots corroborated the findings of the initial screen, while also providing a more complete characterization of the array of fungal taxa that were present. Although lower in diversity than has been reported for orchids growing in the wild, these endophytes have the potential to substantially enhance the growth and disease resistance of horticultural orchids.

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An Overview on Orchid Endophytes

Cited by 31 publications

References 82 publications

Root endophytic fungi promote in vitro seed germination in Pleurothallis coriacardia (Orchidaceae)

Root endophytic fungi promote in vitro seed germination in Pleurothallis coriacardia (Orchidaceae)

Identification of endophytic fungi from roots of two Dendrobium species and evaluation of their antibacterial property

Diversity of unique, nonmycorrhizal endophytic fungi in cultivated Phalaenopsis orchids: A pilot study

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