ISHS Acta Horticulturae 1296: International Symposium on Advanced Technologies and Management for Innovative Greenhouses: GreenSys2019
Effect of different light-emitting diodes wavelengths on the growth of grey mold |
| Authors: | N. Rasiukevičiūtė, A. Brazaitytė, A. Valiuškaitė, V. Vaštakaitė-Kairienė, A. Bylaitė, P. Duchovskis, G. Samuolienė |
| Keywords: | Botrytis cinerea, DAI, growth, LED, pathogen |
| DOI: | 10.17660/ActaHortic.2020.1296.33 |
| Abstract:
The emerging risk of pathogens resistance to chemical pesticides demands advanced solutions for plant protection. Light influence plants and pathogen interactions and affect variable biological plant mechanisms which influence plant resistance to the diseases. Therefore, the specific light-emitting diodes (LED) spectrum could be used for disease suppression. This study aimed to evaluate the influence of different LED light wavelengths on the growth parameters of Botrytis cinerea. The experiments were conducted in a controlled environment chamber. The B. cinerea was exposed by five different wavelengths of LED-light under photosynthetic photon flux density of 20±2 μmol m‑2 s‑1 for 7 days by 16-h photoperiod. The 7-mm mycelial plugs were placed in the center of Petri with potato dextrose agar. The growth rates were determined by daily measuring of the diameter till 7 days after inoculation (DAI). The mycelial distribution, conidia presence and size (μm) were evaluated after 7 DAI. To determine the recovery of the isolates after 7 DAI illumination re-isolation was done. In addition, at the end of illumination plates were transferred for 7 days to the incubator at 22±2°C to evaluate mycelium and sclerotia morphological. The results showed that disease management with LED light could be a tool for improving disease control. The morphological and phenotypic features of B. cinerea depends on specific LED light wavelength. The highest inhibition of B. cinerea mycelium growth was under royal blue. The LED light also influenced the distribution of sclerotia under different wavelengths. The recovery of B. cinerea after illumination is quite fast; therefore, disease control LED light should be in cycles to suspend pathogen recovery. The research data shows that LED light affects Botrytis cinerea morphological and phenotypic characteristics, but this research is in the initial stage and needs further investigation. | |
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