The effect of light quality on some quantitative and qualitative characteristics of fruits of grape (Vitis vinifera L.) cv. Yaghooti, under salinity conditions in greenhouse

Document Type : Full Paper

Authors

1 PhD Student, Department of Horticultural Sciences, Faculty of Agricultural, Bu-Ali Sina University, Hamedan, Iran

2 Department of Horticultural Sciences, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran

3 Professor, Department of Horticultural Science, Faculty of Agricultural, Bu-Ali Sina University, Hamedan, Iran

Abstract

The purpose of this study was to investigate the effect of light quality on some quantitative and qualitative traits of grape fruit in response to the salinity of nutrient solution in hydroponic system in greenhouse, was carried out as a factorial experiment with two factors based on a completely randomize design and three replications over two successive years. The first factor was light quality at 5 levels and the second factor was electrical conductivity caused by adding sodium chloride to the nutrient solution at 4 levels . The results of this study showed that The combination of red and blue light (70-30) compared to other light qualities, the weight, length, width and cluster density are 53, 71.89, 70 and 36% more than the natural light of the greenhouse at 10.23 Ms/cm treatment respectively. The combination of red and blue lights increases the amount of dry matter (18.31%), dissolved solids (18.31%), titratable acid (12.51%), antioxidant capacity (20%) and vitamin C (39.49%). It increased compared to the natural light of the greenhouse and also caused the lowest accumulation of tannin in the fruit (29.55%) in the treatment of 10.23 Ms/cm. Blue light (100%) sugar to acid ratio (18.31%), and 37.41% more than natural greenhouse light caused a higher level of anthocyanin in grape fruit. Therefore, the combination of red and blue lights, especially the ratio of 70-30%, showed a greater effect in maintaining and improving the quantitative and qualitative characteristics of the fruit in severe salinity treatment.

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Articles in Press, Accepted Manuscript
Available Online from 19 November 2023
  • Receive Date: 05 July 2023
  • Revise Date: 22 August 2023
  • Accept Date: 04 September 2023