The bacterium Xylella fastidiosa is the causal agent of citrus variegated chlorosis (CVC) and has been associated with important losses in commercial orchards of all sweet orange [Citrus sinensis (L.)] cultivars. The development of this disease depends on the environmental conditions, including the endophytic microbial community associated with the host plant. Previous studies have shown that X. fastidiosa interacts with the endophytic community in xylem vessels as well as in the insect vector, resulting in a lower bacterial population and reduced CVC symptoms. The citrus endophytic bacterium Methylobacterium mesophilicum can trigger X. fastidiosa response in vitro, which results in reduced growth and induction of genes associated with energy production, stress, transport, and motility, indicating that X. fastidiosa has an adaptive response to M. mesophilicum. Although this response may result in reduced CVC symptoms, the colonization rate of the endophytic bacteria should be considered in studies that intend to use this endophyte to suppress CVC disease. Symbiotic control is a new strategy that uses symbiotic endophytes as biological control agents to antagonize or displace pathogens. Candidate endophytes for symbiotic control of CVC must occupy the xylem of host plants and attach to the precibarium of sharpshooter insects to access the pathogen. In the present review, we focus on interactions between endophytic bacteria from sweet orange plants and X. fastidiosa, especially those that may be candidates for control of CVC.
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http://dx.doi.org/10.1590/1678-4685-GMB-2016-0056 | DOI Listing |
Front Microbiol
December 2024
Indian Council of Agricultural Research-National Research Centre for Grapes, Pune, Maharashtra, India.
Introduction: Grapevine ( L.), one of the economically important fruit crops cultivated worldwide, harbours diverse endophytic bacteria (EBs) responsible for managing various fungal diseases. Anthracnose () (Penz.
View Article and Find Full Text PDFISME Commun
January 2024
School of Environmental and Forest Sciences, College of the Environment, University of Washington, Seattle, WA 98195-2100, United States.
Endophytes are microbes living within plant tissue, with some having the capacity to fix atmospheric nitrogen in both a free-living state and within their plant host. They are part of a diverse microbial community whose interactions sometimes result in a more productive symbiosis with the host plant. Here, we report the co-isolation of diazotrophic endophytes with synergistic partners sourced from two separate nutrient-limited sites.
View Article and Find Full Text PDFCureus
November 2024
Department of Oral Pathology and Microbiology, Manav Rachna Dental College, Faridabad, IND.
Introduction Oral verrucous carcinoma (OVC), a low-grade variation of oral squamous cell carcinoma (OSCC), is distinguished by endophytic development and a pebbly, mammillated surface. OVC, often referred to as Ackerman's tumor, has been known to involve lymph nodes but rarely spreads to regional and distant locations; when the primary tumor grows, it frequently involves surrounding tissues. Histopathologically, it has a thicker basement membrane, many reduplications, and a large area of inflammatory infiltration that resembles OSCC.
View Article and Find Full Text PDFBMC Plant Biol
December 2024
Botany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt.
Zea mays L. (Maize) is one of the most crucial world's crops, for their nutritional values, however, the water scarcity and consequent soil salinization are the major challenges that limit the growth and productivity of this plant, particularly in the semi-arid regions in Egypt. Recently, biopriming has been recognized as one of the most efficient natural-ecofriendly approaches to mitigate the abiotic salt stress on plants.
View Article and Find Full Text PDFMol Genet Genomics
December 2024
Institute of Ecology and Earth Sciences, University of Tartu, Liivi 2, 50409, Tartu, Estonia.
Root nodule symbiosis is traditionally recognized in the Fabales, Fagales, Cucurbitales, and Rosales orders within the Rosid I clade of angiosperms. However, ambiguous root nodule formation has been reported in Zygophyllaceae and Roystonea regia (Arecaceae), although a detailed analysis has yet to be conducted. We aimed to perform morphological analyses of root structures in these plants and utilize metagenomic techniques to identify and characterize the bacterial populations within the nodule-like structures.
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