Fluorescence quantum yield of natural dye extracted from Tradescantia pallida purpurea as a function of the seasons: Preliminary bioapplication as a fungicide probe for necrotrophic fungi.

Autor: De Lima SR; Instituto de Física, Universidade Federal de Uberlândia -UFU, Av. João Naves de Ávila 2121, CEP 38.400-902 Uberlândia, MG, Brazil., Felisbino DG; Instituto de Física, Universidade Federal de Uberlândia -UFU, Av. João Naves de Ávila 2121, CEP 38.400-902 Uberlândia, MG, Brazil., Lima MRS; Instituto de Física, Universidade Federal de Uberlândia -UFU, Av. João Naves de Ávila 2121, CEP 38.400-902 Uberlândia, MG, Brazil., Chang R; Instituto de Química, Universidade Federal de Uberlândia -UFU, Av. João Naves de Ávila 2121, CEP 38.400-902 Uberlândia, MG, Brazil., Martins MM; Instituto de Biotecnologia, Universidade Federal de Uberlândia -UFU, Av. Amazonas s/n- Bloco 2E, CEP 38.405-320 Uberlândia, MG, Brazil., Goulart LR; Instituto de Biotecnologia, Universidade Federal de Uberlândia -UFU, Av. Amazonas s/n- Bloco 2E, CEP 38.405-320 Uberlândia, MG, Brazil. Electronic address: lrgoulart@ufu.br., Andrade AA; Instituto de Física, Universidade Federal de Uberlândia -UFU, Av. João Naves de Ávila 2121, CEP 38.400-902 Uberlândia, MG, Brazil., Messias DN; Instituto de Física, Universidade Federal de Uberlândia -UFU, Av. João Naves de Ávila 2121, CEP 38.400-902 Uberlândia, MG, Brazil., Dos Santos RR; Instituto de Ciências Agrárias, Universidade Federal de Uberlândia -UFU, Av. Amazonas s/n- Bloco 2E, CEP 38.400-902 Uberlândia, MG, Brazil., Juliatti FC; Instituto de Ciências Agrárias, Universidade Federal de Uberlândia -UFU, Av. Amazonas s/n- Bloco 2E, CEP 38.400-902 Uberlândia, MG, Brazil., Pilla V; Instituto de Física, Universidade Federal de Uberlândia -UFU, Av. João Naves de Ávila 2121, CEP 38.400-902 Uberlândia, MG, Brazil. Electronic address: vivianepilla@ufu.br.
Jazyk: angličtina
Zdroj: Journal of photochemistry and photobiology. B, Biology [J Photochem Photobiol B] 2019 Nov; Vol. 200, pp. 111631. Date of Electronic Publication: 2019 Sep 13.
DOI: 10.1016/j.jphotobiol.2019.111631
Abstrakt: In this work, over the course of four seasons (12 months), we have monitored the fluorescence quantum efficiency (η) from two sets (S1 and S2) of fresh natural dye extracts from the leaves of Tradescantia pallida purpurea. The natural dye was extracted in aqueous solutions from leaves collected from regions with a predominance of shade (S1) and sun (S2) during the day. The thermo-optical parameter fractional thermal load (φ) was measured using conical diffraction (CD) patterns caused by thermally driven self-phase modulation, for η determination in both sets of solutions. Fluorescence measurements corroborate the CD results, and the η values are, on average, slightly higher (~ 11%) in the summer than in the other seasons for both sets of samples (S1 and S2). In addition, the experimental results are presented using natural dye extracted from Tradescantia pallida purpurea as a fungicide probe in Fusarium solani, Sclerotinia sclerotiorum, and Colletotrichum gloeosporioides fungi. The promising fungicide results obtained for the aqueous natural dye extract were compared with those obtained for other natural dyes and fungi. The fungi tested are of the necrotrophic group and constitute important pathosystems in Brazil, causing diseases in several crops that synthetic fungicides often cannot control or do so with low efficiency.
(Copyright © 2019 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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