Eurasian Journal of Biosciences

Foliar application of potassium nitrate and 2,4-dichlorophenoxyacetic acid affect some fruit splitting related characteristics and biochemical traits of mandarin cv. ‘page’


Fruit splitting and quality are the most values in mandarin cv. ‘Page’ since they are playing the main role in the production and exporting potential. Therefore, this study was carried out to evaluated the foliar application of KNO3 (0, 1 and 2%) and 2,4-dichlorophenoxyacetic acid (2,4-D, 0, 50 and 100 mg/L) at three stages (full bloom, end of petal fall, and end of June drop) during two growing seasons (2016 and 2017) on some fruit splitting related characteristics and biochemical traits of mandarin cv. ‘Page’. Foliar application of KNO3 and 2,4-D treatment significantly reduced fruit splitting severity, peel firmness and SSC/TA ratio, but significantly enhanced fruit size, β-galactosidase and PG activity, SSC, TA, vitamin C, TPC, and TAC as compared with control. A negative correlation was revealed between PG and β-galactosidase activity and fruit splitting severity. Moreover, a synergistic effect of KNO3 and 2,4-D treatments was found in treated fruits as the highest content of obtained in KNO3 2% + 2,4-D 100 mg/L treatment. Overall, it is proposed that the foliar application of KNO3 2% + 2,4-D 100 mg/L in mandarin cv. ‘Page’ trees could be more suitable to reduce fruit splitting and improve fruit quality.


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