Citrus black rot is a serious disease of citrus plants caused by Alternaria citri. The current study aimed to synthesize zinc oxide nanoparticles (ZnO-NPs) by chemically or green method and investigate their antifungal activity against A. citri. The sizes of synthesized as measured by transmission electron microscope of ZnO-NPs were 88 and 65 nm for chemical and green methods, respectively. The studied prepared ZnO-NPs were applied, in vitro and in situ, at different concentrations (500, 1,000, and 2,000 µg/ml) in post-harvest treatment on navel orange fruits to verify the possible control effect against A. citri. Results of in vitro assay demonstrated that, at concentration 2,000 µg/ml, the green ZnO-NPs was able to inhibit about 61% of the fungal growth followed by 52% of chemical ZnO-NPs. In addition, scanning electron microscopy of A. citri treated in vitro with green ZnO-NPs showed swelling and deformation of conidia. Results showed also that, using a chemically and green ZnO-NPs at 2,000 µg/ml in situ in post-harvest treatment of orange, artificially-infected with A. citri, has reduced the disease severity to 6.92% and 9.23%, respectively, compared to 23.84% of positive control (non-treated fruits) after 20 days of storage. The out findings of this study may contribute to the development of a natural, effective, and eco-friendly strategy for eradicating harmful phytopathogenic fungi.
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http://dx.doi.org/10.5423/PPJ.OA.02.2023.0035 | DOI Listing |
Adv Healthc Mater
October 2024
Key Laboratory for Advanced Materials, College of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China.
Mild photothermal therapy (PTT) has attracted attention for effectively avoiding the severe side effects associated with high-temperature tumor ablation. However, its progress is hindered by the limited availability of high-performance photothermal agents (PTAs) and the thermoresistance of cancer cells induced by heat shock reactions. Herein, this work proposes a new strategy to expand the library of high-performance organic small-molecule PTAs and utilize it to construct a multifunctional nano-theranostic platform.
View Article and Find Full Text PDFJ Clin Med
October 2023
Department of Surgery, Auckland City Hospital, Auckland 1023, New Zealand.
Malar J
August 2023
Parasite & Host Biology Group, ICMR-National Institute of Malaria Research, Dwarka, Sector 8, New Delhi, 110077, India.
Plant Dis
October 2020
Esalq/USP, NAP/MEPA, Av.Padua Dias 11, Piracicaba, SP, Brazil, 13418-900;
Endive (Cichorium endivia L.) is a very important cash crop for small farmers in Brazil. During inspections conducted in the summer season of 2019-2020, leaf samples of C.
View Article and Find Full Text PDFAliment Pharmacol Ther
December 2019
First Department of Internal Medicine, San Matteo Hospital Foundation, University of Pavia, Pavia, Italy.
Background: Autoimmune atrophic gastritis (AAG) is an immune-mediated disorder characterised by destruction of gastric oxyntic mucosa AIM: To explore gastric histopathological evolution in a cohort of AAG patients over a prolonged follow-up METHODS: Single centre prospective study enrolling consecutive patients with histologically confirmed AAG between 2000 and 2018. All AAG patients undergoing endoscopic follow-up every 1-3 years were classified as having stages 1, 2 or 3 according to atrophy severity (mild, moderate and severe). AAG patients with either glandular or neuroendocrine dysplasia/neoplasia were classified as having stage 4.
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