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Microorganisms
Special Issues
Cyanobacteria, Microalgae, and Fungi: Biotechnology and Toxicology
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Cyanobacteria, Microalgae, and Fungi: Biotechnology and Toxicology

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Plant Microbe Interactions".

Deadline for manuscript submissions: closed (31 May 2022) | Viewed by 3707

Special Issue Editor

Dr. Rosário Martins

E-Mail Website
Guest Editor
1. School of Health, Polytechnic Institute of Porto (ESS|P: PORTO), Porto, Portugal
2. Portugal/Interdisciplinary Centre of Marine and Environmental Research, (CIIMAR/CIMAR), Porto, Portugal
Interests: biotechnology; cyanobacteria; natural products
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Cyanobacteria, microalgae, and fungi have been at the forefront for the production of natural compounds with biotechnological potential, namely pharmacological and cosmetic. However, some strains may also be toxin producers which may threaten public and environmental health. Nevertheless, the two sides of the same coin may work in the same direction. For example, the history behind the relevance of cyanobacteria in neurodegenerative diseases also comes from the production of toxins in order to reduce palatability and avoid predation. Toxin-targeted cholinergic synapses and voltage-gated channels, such as anatoxin-a, anatoxin-a(s), antillatoxins, and saxitoxins, have also been found to be of pharmacological interest for pain and neuroprotection. In addition to the biotechnological and toxicological aspects of the proposed organisms, a particular subtopic thus includes the relation between toxins and potential pharmacological applications, and another the sustainable production of these organisms for industrial purposes. With this Special Issue, we aim to offer an opportunity to scientists to present recent findings that will be widely accessible to the scientific community.

Dr. Rosário Martins
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Microorganisms is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • cyanobacteria
  • microalgae
  • fungi
  • natural compounds
  • biotechnology
  • drug discovery
  • pharmacology
  • cosmetics
  • toxicology
  • toxins
  • sustainable production

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Published Papers (1 paper)

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Research

20 pages, 735 KiB  
Article
Role of Rhizospheric Microbiota as a Bioremediation Tool for the Protection of Soil-Plant Systems from Microcystins Phytotoxicity and Mitigating Toxin-Related Health Risk
by El Mahdi Redouane, Richard Mugani, Majida Lahrouni, José Carlos Martins, Soukaina El Amrani Zerrifi, Khalid Oufdou, Alexandre Campos, Vitor Vasconcelos and Brahim Oudra
Microorganisms 2021, 9(8), 1747; https://doi.org/10.3390/microorganisms9081747 - 16 Aug 2021
Cited by 10 | Viewed by 2770
Abstract
Frequent toxic cyanoblooms in eutrophic freshwaters produce various cyanotoxins such as the monocyclic heptapeptides microcystins (MCs), known as deleterious compounds to plant growth and human health. Recently, MCs are a recurrent worldwide sanitary problem in irrigation waters and farmland soils due to their [...] Read more.
Frequent toxic cyanoblooms in eutrophic freshwaters produce various cyanotoxins such as the monocyclic heptapeptides microcystins (MCs), known as deleterious compounds to plant growth and human health. Recently, MCs are a recurrent worldwide sanitary problem in irrigation waters and farmland soils due to their transfer and accumulation in the edible tissues of vegetable produce. In such cases, studies about the persistence and removal of MCs in soil are scarce and not fully investigated. In this study, we carried out a greenhouse trial on two crop species: faba bean (Vicia faba var. Alfia 321) and common wheat (Triticum aestivum var. Achtar) that were grown in sterile (microorganism-free soil) and non-sterile (microorganism-rich soil) soils and subjected to MC-induced stress at 100 µg equivalent MC-LR L−1. The experimentation aimed to assess the prominent role of native rhizospheric microbiota in mitigating the phytotoxic impact of MCs on plant growth and reducing their accumulation in both soils and plant tissues. Moreover, we attempted to evaluate the health risk related to the consumption of MC-polluted plants for humans and cattle by determining the estimated daily intake (EDI) and health risk quotient (RQ) of MCs in these plants. Biodegradation was liable to be the main removal pathway of the toxin in the soil; and therefore, bulk soil (unplanted soil), as well as rhizospheric soil (planted soil), were used in this experiment to evaluate the accumulation of MCs in the presence and absence of microorganisms (sterile and non-sterile soils). The data obtained in this study showed that MCs had no significant effects on growth indicators of faba bean and common wheat plants in non-sterile soil as compared to the control group. In contrast, plants grown in sterile soil showed a significant decrease in growth parameters as compared to the control. These results suggest that MCs were highly bioavailable to the plants, resulting in severe growth impairments in the absence of native rhizospheric microbiota. Likewise, MCs were more accumulated in sterile soil and more bioconcentrated in root and shoot tissues of plants grown within when compared to non-sterile soil. Thereby, the EDI of MCs in plants grown in sterile soil was more beyond the tolerable daily intake recommended for both humans and cattle. The risk level was more pronounced in plants from the sterile soil than those from the non-sterile one. These findings suggest that microbial activity, eventually MC-biodegradation, is a crucial bioremediation tool to remove and prevent MCs from entering the agricultural food chain. Full article
(This article belongs to the Special Issue Cyanobacteria, Microalgae, and Fungi: Biotechnology and Toxicology)
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