The impact of foliar application of exogenous cytokinin (CPPU) and amino acids on the quantitative and qualitative characteristics of kiwifruit (Actinidia deliciosa 'Hayward')

Articles in Press

Document Type : Full Paper

Authors

1 Department of Horticultural Sciences, Faculty of Agriculture, University of Zanjan, Zanjan, Iran

2 Department of Horticulture Crops Research, Guilan Agricultural and Natural Resources Research and Education Center, AREEO, Rasht, Iran.

3 Department of Horticultural Sciences, Faculty of Agriculture, University of Zanjan, Zanjan, Iran.

Abstract

Increasing the yield and improving the quality of fruit with high weight is the main goal of kiwifruit producers over the world. The purpose of this research was to determine the most suitable concentration of cytokinin CPPU and Amino Spark amino acid and the appropriate foliar spraying time to increase the quantity and quality of kiwifruit. This experiment was carried out as a factorial in the form of a randomized complete block design with two factors in three replications. The first factor included cytokinin in two and amino acid in three concentrations and the control, and the second factor included the foliar spraying time in the beginning of the third and fourth week after fullbloom. The results showed that the highest fruit weight with 121.6 g, vitamin C with 47.4 mg/100 gFW, firmness of fruit tissue with 5.3 kg/cm2, total phenol with 78.7 mg/100 gFW, total flavonoid with 13.8 mg/100 gFW, antioxidant capacity with 82.2% and catalase enzyme activity with 9.2 U/gFW in the treatment of 3000 ppm of amino acid at the beginning of the fourth week spraying after fullbloom. The highest activities of superoxide dismutase, ascorbate peroxidase, fruit length and fruit diameter were obtained in the treatment of 3000 ppm of amino acid and 1.5 ppm of cytokinin. According to the results, spraying of 3000 ppm of amino acid and 1.5 ppm of cytokinin at the beginning of the fourth week after fullbloom showed significant positive effects on most of the studied traits compared to the control.

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Iranian Journal of Horticultural Science

Articles in Press, Accepted Manuscript
Available Online from 11 May 2024

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History

  • Receive Date: 11 December 2023
  • Revise Date: 20 April 2024
  • Accept Date: 11 May 2024

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