Photoinactivation of Pseudomonas syringae pv. actinidiae in kiwifruit plants by cationic porphyrins

Planta
Diana MartinsAdelaide Almeida

Abstract

The studied cationic porphyrins formulation allows an effective photoinactivation of Pseudomonas syringae pv. actinidiae in kiwifruit leaves under sunlight irradiation, without damaging the plant. Pseudomonas syringae pv. actinidiae (Psa) is a Gram-negative phytopathogenic bacterium responsible for canker on kiwifruit plant. Over the last decade, this bacterium dramatically affected the production of this fruit worldwide, causing significant economic losses. In general, Psa control consists in the application of copper which are toxic and persist in the environment. The application of antimicrobial photodynamic therapy (aPDT) as an alternative to inactivate Psa has already been demonstrated in recent studies that showed a 4 log Psa reduction using the cationic porphyrin Tetra-Py+-Me as photosensitizer (PS) and 3 consecutive cycles of treatment with a light irradiance of 150 mW cm-2. The present work aimed to evaluate the photodynamic efficiency of a new formulation constituted with five cationic porphyrins as PS in Psa inactivation. This new formulation was prepared to have as main component the tri-cationic porphyrin which is considered one of the most efficient photosensitizers in the photoinactivation of microorganisms. The ...Continue Reading

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Citations

Jun 20, 2019·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Michael GlueckKristjan Plaetzer
Dec 5, 2018·Frontiers in Microbiology·Cátia VieiraAdelaide Almeida
Dec 20, 2019·Applied Microbiology and Biotechnology·Larindja A M PinheiroAdelaide Almeida
Jul 7, 2020·Letters in Applied Microbiology·A Ndemueda Cunha
Nov 27, 2019·Antibiotics·Vera SousaAdelaide Almeida
Dec 8, 2020·Frontiers in Microbiology·Libin JiangMingdong Huang
Apr 27, 2020·Photodiagnosis and Photodynamic Therapy·Márcia BrazAdelaide Almeida

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Methods Mentioned

BETA
MDA
carbonylation

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