Effects of soil drying and a light-reflecting sheet on the fruit quality, vitamin C content, and antioxidant capacity of blackcurrant fruits (Ribes nigrum L.)
2015
Fujisawa, H. (Tokyo University of Agriculture (Japan). Faculty of Agriculture, Department of Agriculture) | Baba, T. | Saito, R. | Kawai, Y. | Yamaguchi, M. | Shouji, T.
Potted plants of the blackcurrant cultivar 'Radiant' were subjected to soil drying with limited irrigation. The treatment decreased fruit size, increased titratable acidity, and tended to increase vitamin C content in fruits, as compared with sufficiently irrigated plants. There was no difference in soluble solid content and antioxidant capacity (evaluated using the hydrophilic-oxygen radical absorbance capacity (H-ORAC) method) between the treated and control plants. Potted plants of the blackcurrant cultivar 'Nevis' were subjected to mulching culture by using a light-reflecting sheet. In this experiment, both treated and control plants were sufficiently watered. The soluble solid content and titratable acidity of the treated fruits were similar to those of the control fruits, while vitamin C content of the treated fruits was higher and antioxidant capacity of the treated fruits tended to increase as compared with the control fruits. These results indicate that soil drying and a light-reflecting sheet are capable of increasing the nutritional quality and functional components of blackcurrant fruits.
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