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Application of the biospeckle method for monitoring bull's eye rot development and quality changes of apples subjected to various storage methods-preliminary studies.

Adamiak A, Zdunek A, Kurenda A, Rutkowski K - Sensors (Basel) (2012)

Bottom Line: After that time, 34% of 'Pinova' and 21% of 'Topaz' apples displayed visible surface lesions.In the second experiment various storage conditions were used and apples were tested during their shelf life by non-destructive and destructive methods.This study showed that biospeckle activity decreased during shelf life, irrespective of storage conditions.

View Article: PubMed Central - PubMed

Affiliation: Institute of Agrophysics, Polish Academy of Sciences, Lublin 27, Poland. a.adamiak@ipan.lublin.pl

ABSTRACT
In this study, the biospeckle technique was evaluated for monitoring of apple bull's eye rot development and product quality in general, during storage under various conditions and during subsequent shelf life. This non-destructive optical method is based on the analysis of laser light variations scattered from the sample. Apples of the cultivars 'Pinova' and 'Topaz', susceptible to bull's eye rot, were used in two independent experiments. In the first, apples were non-destructively monitored for five months during cold storage. After that time, 34% of 'Pinova' and 21% of 'Topaz' apples displayed visible surface lesions. The increase of biospeckle activity was observed during the development of fungal disease. In the second experiment various storage conditions were used and apples were tested during their shelf life by non-destructive and destructive methods. This study showed that biospeckle activity decreased during shelf life, irrespective of storage conditions.

No MeSH data available.


Related in: MedlinePlus

Biospeckle activity BA of one selected ‘Pinova’ apples for healthy and decaying tissue during storage. Photographic documentation of apple bull’s eye rot development is also given. Lesion area is marked by black arrow and red circle presents laser illumination point.
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f4-sensors-12-03215: Biospeckle activity BA of one selected ‘Pinova’ apples for healthy and decaying tissue during storage. Photographic documentation of apple bull’s eye rot development is also given. Lesion area is marked by black arrow and red circle presents laser illumination point.

Mentions: Each mean BA value, presented in Figures 2 and 3, was calculated from 600 measurements (100 apples × 6 places on the equator). Standard deviations of BA are relatively large however due to number of repetitions observed changes were often significant and allowed making conclusions about trends. Overall effect of storage showed significant change of biospeckle activity (F-value > 38, p < 0.05). With one exception, BA change trends were similar for apples of both cultivars. On day 26 of storage, however, BA of ‘Topaz’ apples occasionally increased (Figure 3). Despite this, BA of healthy apples seemed to decrease (‘Pinova’) or, at least, remained constant (‘Topaz’) during the initial 40 d of storage. In the next stage, (∼40–100 storage days) BA significantly increased as the post-hoc analysis showed. In this period small, light–brown, circular spots appeared. Prolonged storage (∼100–140 d) caused pronounced visible symptoms and death of the tissue. This is accompanied by significant decrease of biospeckle activity (Figure 4).


Application of the biospeckle method for monitoring bull's eye rot development and quality changes of apples subjected to various storage methods-preliminary studies.

Adamiak A, Zdunek A, Kurenda A, Rutkowski K - Sensors (Basel) (2012)

Biospeckle activity BA of one selected ‘Pinova’ apples for healthy and decaying tissue during storage. Photographic documentation of apple bull’s eye rot development is also given. Lesion area is marked by black arrow and red circle presents laser illumination point.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3376596&req=5

f4-sensors-12-03215: Biospeckle activity BA of one selected ‘Pinova’ apples for healthy and decaying tissue during storage. Photographic documentation of apple bull’s eye rot development is also given. Lesion area is marked by black arrow and red circle presents laser illumination point.
Mentions: Each mean BA value, presented in Figures 2 and 3, was calculated from 600 measurements (100 apples × 6 places on the equator). Standard deviations of BA are relatively large however due to number of repetitions observed changes were often significant and allowed making conclusions about trends. Overall effect of storage showed significant change of biospeckle activity (F-value > 38, p < 0.05). With one exception, BA change trends were similar for apples of both cultivars. On day 26 of storage, however, BA of ‘Topaz’ apples occasionally increased (Figure 3). Despite this, BA of healthy apples seemed to decrease (‘Pinova’) or, at least, remained constant (‘Topaz’) during the initial 40 d of storage. In the next stage, (∼40–100 storage days) BA significantly increased as the post-hoc analysis showed. In this period small, light–brown, circular spots appeared. Prolonged storage (∼100–140 d) caused pronounced visible symptoms and death of the tissue. This is accompanied by significant decrease of biospeckle activity (Figure 4).

Bottom Line: After that time, 34% of 'Pinova' and 21% of 'Topaz' apples displayed visible surface lesions.In the second experiment various storage conditions were used and apples were tested during their shelf life by non-destructive and destructive methods.This study showed that biospeckle activity decreased during shelf life, irrespective of storage conditions.

View Article: PubMed Central - PubMed

Affiliation: Institute of Agrophysics, Polish Academy of Sciences, Lublin 27, Poland. a.adamiak@ipan.lublin.pl

ABSTRACT
In this study, the biospeckle technique was evaluated for monitoring of apple bull's eye rot development and product quality in general, during storage under various conditions and during subsequent shelf life. This non-destructive optical method is based on the analysis of laser light variations scattered from the sample. Apples of the cultivars 'Pinova' and 'Topaz', susceptible to bull's eye rot, were used in two independent experiments. In the first, apples were non-destructively monitored for five months during cold storage. After that time, 34% of 'Pinova' and 21% of 'Topaz' apples displayed visible surface lesions. The increase of biospeckle activity was observed during the development of fungal disease. In the second experiment various storage conditions were used and apples were tested during their shelf life by non-destructive and destructive methods. This study showed that biospeckle activity decreased during shelf life, irrespective of storage conditions.

No MeSH data available.


Related in: MedlinePlus