The effect of pre-harvest foliar application of oxalic acid on some qualitative characteristics of fruit in two plum cultivars

Articles in Press

Document Type : Research Paper

Authors

1 university of tabriz

2 South Kerman Agricultural and Natural Resources Research and Education Center

10.22034/saps.2025.66795.3358

Abstract

Fruit quality is one of the important factors in the expansion and marketing of horticultural products. Numerous studies have shown that the external application of some chemicals play a significant role in increasing the quality of fruits.
This research was conducted in order to evaluate the fruit quality using oxalic acid (0, 1, 3 and 5 mM) on two plum cultivars "Gold Drop" and "Shabloon" in the form of a factorial experiment based on a randomized complete block design.
. Foliar spraying was done 10 days before commercial ripening (based on total soluble solids index) on ten-year-old trees of two cultivars, "Gold Drop" and "Shabloon".
Qualitative parameters such as fruit firmness, total soluble solids (TSS), titrable acid (TA), fruit juice pH, vitamin C, Total phenol compositions, total flavonoid and total antioxidant capacity (DPPH) were evaluated. The results showed that in both plum cultivars, increasing the concentration of oxalic acid decreased the amount of soluble solids and pH, but fruit firmness, titratable acidity, phenol and total fruit flavonoids increased.
In both cultivars, the highest amount of fruit firmness, titratable acidity and flavonoids were observed in 3 and 5 mM Oxalic acid.

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Journal of Agricultural Science and Sustainable Production

Articles in Press, Accepted Manuscript
Available Online from 20 April 2027

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