Effects of ozone exposure on 'Golden' papaya fruit by photoacoustic phase-resolved method: Physiological changes associated with carbon dioxide and ethylene emission rates during ripening

Journal Article · Wed Jun 01 00:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3592353· OSTI ID:21538422

Correa, Savio Figueira; Brito Paiva, Luisa; Mota do Couto, Flavio; Gomes da Silva, Marcelo; Silva Sthel, Marcelo; Vargas, Helion ^[1]; Mota, Leonardo ^[1]; Goncalves de Oliveira, Jurandi ^[2]; Miklos, Andras ^[3]

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1. Laboratorio de Ciencias Fisicas, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Avenida Alberto Lamego 2000, Parque California 28013-602, Campos dos Goytacazes, Rio de Janeiro (Brazil)
2. Laboratorio de Melhoramento Genetico Vegetal, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Avenida Alberto Lamego 2000, Parque California 28013-602, Campos dos Goytacazes, Rio de Janeiro (Brazil)
3. Fraunhofer Institut fuer Bauphysik, Nobelstrasse 12, Vaihingen 70569, Stuttgart, Baden Wuerttemberg (Germany)

This work addresses the effects of ozone activity on the physiology of 'Golden' papaya fruit. Depth profile analysis of double-layer biological samples was accomplished using the phase-resolved photoacoustic spectroscopy. The feasibility of the method was demonstrated by singling out the spectra of the cuticle and the pigment layers of papaya fruit. The same approach was used to monitor changes occurring on the fruit during ripening when exposed to ozone. In addition, one has performed real time studies of fluorescence parameters and the emission rates of carbon dioxide and ethylene. Finally, the amount of pigments and the changes in waxy cuticle have been monitored. Results indicate that a fruit deliberately subjected to ozone at a level of 6 ppmv underwent ripening sooner (at least 24-48 h) than a fruit stored at ambient conditions. Moreover, ozone caused a reduction in the maximum quantum yield of photosynthetic apparatus located within the skin of papaya fruit.

• OSTI ID: 21538422
• Journal Information: Journal of Applied Physics, Vol. 109, Issue 11; Other Information: DOI: 10.1063/1.3592353; (c) 2011 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
60 APPLIED LIFE SCIENCES
CARBON DIOXIDE
ETHYLENE
FLUORESCENCE
FRUITS
INSTALLATION
IRRADIATION
LAYERS
LIFETIME
MINIMIZATION
OZONE
PHOTOACOUSTIC SPECTROSCOPY
PHOTOSYNTHESIS
PIGMENTS
REACTOR COMPONENTS
REMOVAL
RIPENING
SPECTRA
ALKENES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
EMISSION
FOOD
HYDROCARBONS
LUMINESCENCE
OPTIMIZATION
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTON EMISSION
SPECTROSCOPY
SYNTHESIS