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- 저자 : Héctor Olivares-Soto (검색결과 1 건)
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Héctor Olivares-Soto,Richard M. Bastías,Arturo Calderón-Orellana,María Dolores López 한국원예학회 2020 Horticulture, Environment, and Biotechnology Vol.61 No.2
Netting has been widely used in recent years to protect apple fruit from solar injury. There is little information on the biochemicalaspects underlying the eff ectiveness of netting against sunburn in apples. The objective of this study was to quantifythe eff ects of netting on polyphenols, anthocyanins, and antioxidant activity in apples with diff erent sunburn degrees in termsof fruit peel color variation. Orchards of ‘Gala Brookfi eld’ and ‘Fuji Raku Raku’ apples were covered in red and pearl nets(providing 20% shading), respectively. Uncovered trees served as controls for the experiments. Spectral light transmissionwas measured under the nets from 350 to 1700 nm. Photosynthetically active radiation (PAR), ultraviolet radiation (UV),and fruit surface temperature (FST) were evaluated from 20 to 175 day after full blooming. Red netting increased the amountof red (600–700 nm) and blue (400–500 nm) wavelengths of the visible spectrum. Both red and pearl nets reduced infrared(900–1700 nm) transmission by 8%, which resulted in a decrease around 5 °C in FST. Similarly, PAR radiation was reducedby 25 and 21% on average, while the reduction in UV radiation reached 29 and 25% with red and pearl netting, respectively. In moderate (browning; SB-3) and severe (browning with necrosis; SB-4) damage categories, sunburn decreased 15% in‘Gala Brookfi eld’ under red netting, and only 4% in ‘Fuji Raku Raku’ under pearl netting. In ‘Gala Brookfi eld’, red nettingsignifi cantly increased anthocyanin content and ferric ion-reducing antioxidant power (FRAP) antioxidant capacity for theSB4 sunburn category. In contrast, pearl netting signifi cantly reduced the amount of polyphenols, anthocyanins, and theFRAP antioxidant capacity in SB-4 sunburn group of ‘Fuji Raku Raku’ apples. Collectively, our results suggest that sunprotection provided by netting result in changes in the composition and antioxidant capacity of fruit peels, whose responsevaries depending on the cultivar and type of net used.
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