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Fluorescence-Sensor Mapping for the in Vineyard Non-Destructive Assessment of Crimson Seedless Table Grape Quality.
- Source :
-
Sensors (Basel, Switzerland) [Sensors (Basel)] 2020 Feb 12; Vol. 20 (4). Date of Electronic Publication: 2020 Feb 12. - Publication Year :
- 2020
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Abstract
- Non-destructive tools for the in situ evaluation of vine fruit quality and vineyard management can improve the market value of table grape. We proposed a new approach based on a portable fluorescence sensor to map the ripening level of Crimson Seedless table grape in five different plots in the East, Central-North and South of the Macedonia Region of Greece. The sensor provided indices of ripening and color such as SFR <subscript>R</subscript> and ANTH <subscript>RG</subscript> correlated to the chlorophyll and anthocyanin berry contents, respectively. The mean ANTH <subscript>RG</subscript> index was significantly different among all the plots examined due to the occurrence of different environmental conditions and/or asynchronous ripening processes. The indices presented moderate, poor in some cases, spatial variability, probably due to a significant vine-to-vine, intra-vine and intra-bunch variability. The cluster analysis was applied to the plot with the most evident spatial structure (at Kilkis). Krigged maps of the SFR <subscript>R</subscript> , ANTH <subscript>RG</subscript> and yield were classified by k-means clustering in two-zones that differed significantly in their mean values. ANTH <subscript>RG</subscript> and SFR <subscript>R</subscript> were inversely correlated over 64% of the plot. SFR <subscript>R</subscript> appeared to be a potential useful proxy of yield since it was directly correlated to yield over 66% of the plot. The grape color (ANTH <subscript>RG</subscript> ) was slightly higher over the low-yield zones with respect to the high-yield zones. Our study showed that the combination of anthocyanins and chlorophyll indices detected in the field on Crimson Seedless table grape by a portable fluorescence sensor can help in defining the best harvest time and the best areas for harvesting.<br />Competing Interests: The authors declare no conflict of interest.
Details
- Language :
- English
- ISSN :
- 1424-8220
- Volume :
- 20
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Sensors (Basel, Switzerland)
- Publication Type :
- Academic Journal
- Accession number :
- 32059448
- Full Text :
- https://doi.org/10.3390/s20040983