Endophytic fungi, host genotype, and their interaction influence the growth and production of key chemical components of Dendrobium catenatum

Wu, Ling-Shang; Dong, Weiguo; Si, Jinping; Liu, Jingjing; Zhu, Youyong

doi:10.1016/j.funbio.2020.07.002

Cited by 20 publications

(19 citation statements)

References 39 publications

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“…Moreover, they also play a role in mobilizing soil nutrients in the rhizosphere to improve orchid viability and environmental adaptability, and serve as new sources of phytochemicals and bioactive substances to protect the host from soil pathogens. Hence, these ONF provide the plants with promising medicinal and agricultural breeding prospects (Chen et al, 2006;Yuan et al, 2009;Aly et al, 2010;Novotná et al, 2018;Sisti et al, 2019;Hajong and Kapoor, 2020;Wu et al, 2020). Furthermore, ONF may interact with OMF to influence the distribution and population dynamics of orchids.…”

Section: Introductionmentioning

confidence: 99%

How Mycorrhizal Associations Influence Orchid Distribution and Population Dynamics

Yang

et al. 2021

Front. Plant Sci.

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Orchid distribution and population dynamics are influenced by a variety of ecological factors and the formation of holobionts, which play key roles in colonization and ecological community construction. Seed germination, seedling establishment, reproduction, and survival of orchid species are strongly dependent on orchid mycorrhizal fungi (OMF), with mycorrhizal cheating increasingly observed in photosynthetic orchids. Therefore, changes in the composition and abundance of OMF can have profound effects on orchid distribution and fitness. Network analysis is an important tool for the study of interactions between plants, microbes, and the environment, because of the insights that it can provide into the interactions and coexistence patterns among species. Here, we provide a comprehensive overview, systematically describing the current research status of the effects of OMF on orchid distribution and dynamics, phylogenetic signals in orchid–OMF interactions, and OMF networks. We argue that orchid–OMF associations exhibit complementary and specific effects that are highly adapted to their environment. Such specificity of associations may affect the niche breadth of orchid species and act as a stabilizing force in plant–microbe coevolution. We postulate that network analysis is required to elucidate the functions of fungal partners beyond their effects on germination and growth. Such studies may lend insight into the microbial ecology of orchids and provide a scientific basis for the protection of orchids under natural conditions in an efficient and cost-effective manner.

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Section: Introductionmentioning

confidence: 99%

How Mycorrhizal Associations Influence Orchid Distribution and Population Dynamics

Yang

et al. 2021

Front. Plant Sci.

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“…D. catenatum clonal cultivar ‘Jingpin xianshi’ (6A2B) is susceptible to S. delphinii , which was obtained by subculture from stem explants, placed in a modified 1/2 Murashige and Skoog (MS) medium [ 67 ], and cultivated in a growth room with a 12 h light/12 h dark photoperiod, 60% relative humidity, and 25 °C temperatures. The seedlings used for experiments were in same growth status and about 5 cm high, 6 leaves and 3 ~ 5 roots, and the stem diameter was about 0.3 cm.…”

Section: Methodsmentioning

confidence: 99%

JA signal-mediated immunity of Dendrobium catenatum to necrotrophic Southern Blight pathogen

et al. 2021

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Background Dendrobium catenatum belongs to the Orchidaceae, and is a precious Chinese herbal medicine. In the past 20 years, D. catenatum industry has developed from an endangered medicinal plant to multi-billion dollar grade industry. The necrotrophic pathogen Sclerotium delphinii has a devastating effection on over 500 plant species, especially resulting in widespread infection and severe yield loss in the process of large-scale cultivation of D. catenatum. It has been widely reported that Jasmonate (JA) is involved in plant immunity to pathogens, but the mechanisms of JA-induced plant resistance to S. delphinii are unclear. Results In the present study, the role of JA in enhancing D. catenatum resistance to S. delphinii was investigated. We identified 2 COI1, 13 JAZ, and 12 MYC proteins in D. catenatum genome. Subsequently, systematic analyses containing phylogenetic relationship, gene structure, protein domain, and motif architecture of core JA pathway proteins were conducted in D. catenatum and the newly characterized homologs from its closely related orchid species Phalaenopsis equestris and Apostasia shenzhenica, along with the well-investigated homologs from Arabidopsis thaliana and Oryza sativa. Public RNA-seq data were investigated to analyze the expression patterns of D. catenatum core JA pathway genes in various tissues and organs. Transcriptome analysis of MeJA and S. delphinii treatment showed exogenous MeJA changed most of the expression of the above genes, and several key members, including DcJAZ1/2/5 and DcMYC2b, are involved in enhancing defense ability to S. delphinii in D. catenatum. Conclusions The findings indicate exogenous MeJA treatment affects the expression level of DcJAZ1/2/5 and DcMYC2b, thereby enhancing D. catenatum resistance to S. delphinii. This research would be helpful for future functional identification of core JA pathway genes involved in breeding for disease resistance in D. catenatum.

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“…Tulasnella increased seed germination, protocorm formation, and orchid seedling development (Zi et al 2014;Zhang et al 2020;Freitas et al 2020). Tulasnella has a role to stimulated growth and metabolism in Dendrobium (Wu et al 2020). Roots with the addition of Mycena inoculum show change in morphology and has a bigger size.…”

Section: Mycorrhiza Roles On Seed Germination and Growth Of Dendrobiummentioning

confidence: 99%

“…Orchid seeds are very small and do not have an endosperm (Fochi et al 2017;Xing et al 2017), hence seed germination carries out a symbiosis process with mycorrhizal fungi (Xing et al 2013(Xing et al , 2017Qin et al 2020;Wu et al 2020). Orchids germination requires mycorrhiza to get nutrients and organic carbon (Fochi et al 2017).…”

Section: Mycorrhizal Association Mechanism With Orchidsmentioning

confidence: 99%

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Important Role of Mycorrhiza for Seed Germination and Growth of <i>Dendrobium</i> Orchids

Tsulsiyah

Farida

Sutra

et al. 2021

J.Tropical Biodiversity Biotechnology

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Indonesia is a tropical country that has natural forests and is suitable for orchid species habitat, leading to more than 5,000 species of orchids grow. The tropical area is the main distribution centre for epiphytic orchids, one of which is Dendrobium, which grows more than 1,000 species throughout the world. Orchid seeds are very small and do not have an endosperm, making germination difficult in their natural habitat. Mycorrhizal association with orchids plays a role in the survival of orchids in nature through seed germination and growth. This study aims to provide a deeper understanding about the important role of mycorrhiza in seed germination and growth of Dendrobium. The mechanism of mycorrhizal association with orchids begins with the initial contact of the fungus with the orchid, hyphae enter the cortex cells to form peloton, peloton lysis, and exchange of nutrients occurs. Orchid mycorrhiza that mostly found groups in Dendrobium are Rhizoctonia (Epulorhiza, Tulasnella, Rhizoctonia). Mycorrhiza plays a role in increased secretion of phytohormone and enzyme activity which supports seed germination and growth of orchids. Specific mycorrhizal data on orchids can be used as an effort for in-situ and ex-situ conservation of Indonesian orchids, including Dendrobium.

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Endophytic fungi, host genotype, and their interaction influence the growth and production of key chemical components of Dendrobium catenatum

Cited by 20 publications

References 39 publications

How Mycorrhizal Associations Influence Orchid Distribution and Population Dynamics

How Mycorrhizal Associations Influence Orchid Distribution and Population Dynamics

JA signal-mediated immunity of Dendrobium catenatum to necrotrophic Southern Blight pathogen

Important Role of Mycorrhiza for Seed Germination and Growth of <i>Dendrobium</i> Orchids

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