How does the endophytic fungus Mucor sp. improve Arabidopsis arenosa vegetation in the degraded environment of a mine dump?

Rozpądek, Piotr; Domka, Agnieszka; Ważny, Rafał; Nosek, Michał; Jędrzejczyk, Roman J.; Tokarz, Krzysztof; Turnau, Katarzyna

doi:10.1016/j.envexpbot.2017.11.009

Cited by 40 publications

(43 citation statements)

References 83 publications

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“…inoculation triggered a decrease in catalase activity and did not significantly affect the activities of Zn/CuSOD and FeSOD, despite clear downward trends in the effect of toxicity. It appears then that, as previously reported , Mucor sp. inoculation alleviated metal toxicity directly and, in doing so, resulted in down‐regulation of the plant's stress‐related response.…”

Section: Discussionsupporting

confidence: 83%

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Mucor sp.—An endophyte of Brassicaceae capable of surviving in toxic metal‐rich sites

et al. 2018

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The aim of this study was to assess the biodiversity of endophytic fungi from Arabidopsis arenosa growing on a post mining waste dump and to evaluate their role in plant adaptation to metal toxicity. Severeal of the fungi were beneficial for the plant. Among them, a fungus belonging to the Mucor genus, was found to interact with a broad range of plants, including Brassicaceae metallophytes. Mucor sp. was shown to be highly tolerant to elevated levels of Zn, Cd, and Pb and to accelerate plant‐host growth under either toxic‐metal stress or control conditions. When inoculated with Mucor sp., A. arenosa under toxic‐metal stress acquired more N and showed significantly down‐regulated catalase activity, which suggests suppression of toxic‐metal‐induced oxidative stress. We used the model plant‐A. thaliana to evaluate the dynamics of plant‐tissue colonization by the fungus as monitored with qPCR and to analyze the host's transcriptome response during early stages of the interaction. The results revealed the induction of a plant‐defense and stress‐related response on the 5th day of co‐culture, which was in accord with the decrease of fungal abundance in shoots on the 6th day of interaction. Presented results demonstrate the importance of endophytic fungi in plant toxic‐metal tolerance.

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Section: Discussionsupporting

confidence: 83%

“…In recently published work [23], we have shown the role of Mucor sp. in A. arenosa adaptation to a toxic metalenriched environment, describing the influence of the endophyte on toxic-metal uptake and translocation, plant hormone homeostasis, P uptake and root-hair elongation.…”

Section: Introductionmentioning

confidence: 87%

Mucor sp.—An endophyte of Brassicaceae capable of surviving in toxic metal‐rich sites

et al. 2018

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“…In our previous work, we showed that endophytic fungi positively affect the growth of their host under metal toxicity, low nutrient abundance, and limited water availability (Rozpądek, Domka, Ważny, et al ; Ważny et al, ). The aim of this study was to verify whether the benefits imposed by the fungus are solely stress related and how the symbiotic organism adapts to the increased carbohydrate demand, resulting from (a) the improved growth and (b) the presence of the microorganism, which is an additional sink for carbohydrates.…”

Section: Discussionmentioning

confidence: 99%

“…SnRK1 tightly regulates the energy balance in plants by inhibiting energy consuming processes, including growth and optimizing carbon allocation. In species from the Arabidopsis genus inoculated with endophytic fungi, accelerated growth was accompanied with the phosphate starvation response under P deficiency that improved P uptake (Hiruma et al, ; Rozpądek, Domka, Ważny, et al ). Similarly, in this study, improved carbon assimilation was accompanied with a typical response for C deficiencies.…”

Section: Discussionmentioning

confidence: 99%

“…In our previous research, we showed that the endophytic Zygomycete Mucor sp. (closely related to Mucor racemosus and Mucor plumbeus ) isolated from Arabidopsis arenosa inhabiting a post‐mining dump facilitated vegetative growth when grown under metal toxicity and low nutrient abundance and in A. thaliana in vitro (Rozpądek, Domka, Nosek, et al, ; Rozpądek, Domka, Ważny, et al, ; Ważny et al, ). Interestingly, studies with Mucoromycotina fungi indicate that this plant–endophyte interaction may be older than the symbiosis between plants and mycorrhiza (Field et al, , ); thus, the interaction between Mucor sp.…”

Section: Introductionmentioning

confidence: 99%

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Acclimation of the photosynthetic apparatus and alterations in sugar metabolism in response to inoculation with endophytic fungi

Rozpądek

Nosek

Domka

et al. 2018

Plant Cell & Environment

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The role of an endophytic Zygomycete Mucor sp. in growth promotion and adaptation of the photosynthetic apparatus to increased energy demands of its hosts Arabidopsis arenosa and Arabidopsis thaliana was evaluated. Inoculation with the fungus improved the water use efficiency of the plants and allowed for them to utilize incident light for photochemistry more effectively by upregulating the expression of several photosystem I‐ and II‐related genes and their respective proteins, proteins involved in light harvesting in PSII and PSI and carbon assimilation. This effect was independent of the ability of the plants to acquire nutrients from the soil. We hypothesize that the accelerated growth of the symbiotic plants resulted from an increase in their demand for carbohydrates and carbohydrate turnover (sink strength) that triggered a simultaneous upregulation of carbon assimilation. Arabidopsis plants inoculated with Mucor sp. exhibited upregulated expression in several genes encoding proteins involved in carbohydrate catabolism, sugar transport, and smaller starch grains that indicate a significant upregulation of carbohydrate metabolism.

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Endophytes as Plant Nutrient Uptake-Promoter in Plants

García-Latorre

Rodrigo

Santamaría

2021

Sustainable Development and Biodiversity

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How does the endophytic fungus Mucor sp. improve Arabidopsis arenosa vegetation in the degraded environment of a mine dump?

Cited by 40 publications

References 83 publications

Mucor sp.—An endophyte of Brassicaceae capable of surviving in toxic metal‐rich sites

Mucor sp.—An endophyte of Brassicaceae capable of surviving in toxic metal‐rich sites

Acclimation of the photosynthetic apparatus and alterations in sugar metabolism in response to inoculation with endophytic fungi

Endophytes as Plant Nutrient Uptake-Promoter in Plants

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