Non-destructive postharvest maturity evaluation of golden delicious apple

Zsom-Muha, Viktória; Ember, L.; Hitka, Géza; Baranyai, László; Nguyen, Lien Le Phuong; Nagy, Dávid; Zsom, Tamás

doi:10.17676/hae.2017.32.56

Cited by 1 publication

(2 citation statements)

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“…Depending on the clone, while considering all four harvests, IAD changed in the range from 36 to 44% in the outer-canopy fruit and from 42 to 51% in the inner-canopy fruit, with the lower values being detected in the clone Buckeye ( Figure 5A, Tables A3 and A4). During shelf life, no further significant decrease of IAD was observed ( Figure 5A, Tables A3 and A4), contrary to the expectations, as studies have shown an acceleration of the chlorophyll degradation [38] and IAD [35] with increasing temperature in apple fruit.…”

Section: Kinetics Of Iad In Relation To Starch Pattern Index and Fruicontrasting

confidence: 67%

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A Study on the Potential of IAD as a Surrogate Index of Quality and Storability in cv. ‘Gala’ Apple Fruit

Sadar

Zanella

2019

Agronomy

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The decline of relative chlorophyll contents during fruit ripening is considered to be an important indicator of fruit physiological condition. The recent availability of low-cost portable visible spectrum (VIS) spectrometers has spurred research interest towards optical sensing of chlorophyll changes in intact fruit, with many scientists attempting to link the shifts in optical signals, attributed to chlorophyll changes, to different maturity and quality parameters. One of the widely available portable devices for non-destructive estimation of relative chlorophyll contents is the DA meter, which provides a maturity index that is calculated as a difference between absorption at 670 nm (near the chlorophyll-a absorption peak) and 720 nm (background of the spectrum), abbreviated as IAD. In the present study, the evolution of IAD and its relation to starch pattern index (SPI) and fruit flesh firmness (FFF) was monitored in fruit of two cv. 'Gala' clones during maturation and storage, aiming to identify a potential existence of a usable IAD range for the assessment and prediction of the optimal harvest window and storage potential. In both clones, canopy positions, fruit sides, and seasons IAD, SPI, and FFF generally changed in a linear fashion over time, but with partially very different slopes, i.e., they were changing at different rates. What all of these parameters had in common was the presence of a very high biological variability, which is typical of apple fruit. Significantly powerful estimations of SPI (r 2 > 0.7, p < 0.005) and pre-and post-storage FFF (r 2 > 0.6, p < 0.005) were achieved. However, the very large biological variability could not be neutralized, which means that the predictions always included large confidence intervals of up to 0.46-0.59 units for SPI and 0.82-1.1 kgF FFF, which ultimately makes them unusable for practical applications. Experiments done under real-life conditions in a commercial fruit storage facility on several different fruit batches confirmed that IAD measured at harvest cannot be used indiscriminately for predicting post-storage FFF of cv. 'Gala' originating from different orchards. Nevertheless, mean IAD values that were obtained at optimal maturity from samples of the same orchards remained stable over seasons (0.8-1.2), which strongly suggests that, provided that the calibrations and validations are not only cultivar, but also orchard-specific, IAD has a potential for estimating maturity and storability of apple fruit. In this case, IAD could replace standard maturity indices, otherwise it would be suited for use as a supplementary index for determining fruits physiological maturity status.Agronomy 2019, 9, 642 2 of 16 they are based on destructive analyses, with the obtained data presenting low repeatability and high vulnerability to interpretation errors [1,2].In recent years, various methods for quality and ripeness evaluation of intact agricultural products have been developed [3][4][5][6][7]. A potential technique for assessing fruits physiological stage is to m...

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Section: Kinetics Of Iad In Relation To Starch Pattern Index and Fruicontrasting

confidence: 67%

“…Chlorophyll degradation revealed a sigmoidal pattern during apple fruit ripening [35]. Given that IAD is a measure of relative chlorophyll, it is safe to assume that it also changes in a sigmoidal fashion.…”

Section: Kinetics Of Iad In Relation To Starch Pattern Index and Fruimentioning

confidence: 99%

A Study on the Potential of IAD as a Surrogate Index of Quality and Storability in cv. ‘Gala’ Apple Fruit

Sadar

Zanella

2019

Agronomy

View full text Add to dashboard Cite

show abstract

Non-destructive postharvest maturity evaluation of golden delicious apple

Cited by 1 publication

References 9 publications

A Study on the Potential of IAD as a Surrogate Index of Quality and Storability in cv. ‘Gala’ Apple Fruit

A Study on the Potential of IAD as a Surrogate Index of Quality and Storability in cv. ‘Gala’ Apple Fruit

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