Effect of Hormonization Treatment on Yield Quantity and Quality, Contents of Biologically Active Compounds, and Antioxidant Activity in 'Einset Seedless' Grapevine Fruits and Raisins.

Magdalena Kapłan,Aneta Sławińska,Ewa Jabłońska-Ryś,Kamila Klimek,Anna Stój

doi:10.3390/molecules26206206

Magdalena Kapłan, Aneta Sławińska + Show 3 more

Open Access

https://doi.org/10.3390/molecules26206206

Copy DOI

Abstract

In this study, we determined the effect of hormonization treatment on yield quantity and quality, content of biologically active compounds, and antioxidant activity in fruits and raisins of ‘Einset Seedless’ grapevine. Field studies were conducted in 2017 at Nobilis Vineyard (50°39′ N; 21°34′ E) in the Sandomierz Upland. Analytical studies were carried out in the Laboratory of the University of Life Sciences in Lublin. Hormonized fruits and raisins, which were dried at 40 °C in a food dryer for 7 days, were the experimental material. It was shown that the application of the hormonization treatment had a significant effect on yield size and quality. The hormonization treatment and the form of plant material analyzed had a significant effect on the content of biologically active compounds and the antioxidant activity in ‘Einset Seedless’ grapevine fruits and raisins. The concentration of applied gibberellic acid had a significant effect on the levels of acidity, content of anthocyanins, and antioxidant activity determined with the FRAP and DPPH methods. The application of the multivariate analysis technique showed that, in the fresh fruits and raisins, the level of biologically active compounds and antioxidant activity in the case of the 200 mg∙GA3∙L−1 concentration and in the control combination was similar but differed significantly in the case of the 300 mg∙GA3∙L−1 application.

Highlights

Of all the grapes produced in the world, 80% of the harvest is used to make wine, 13% are dessert grapes, and the rest are used to make raisins [1]
The statistical analysis showed a significant effect of the hormonization treatment on the studied trait, while there was no significant effect of the concentration of applied gibberellic acid on the weight of one berry. This is consistent with the results reported by other researchers, e.g., Halbrooks and Mortensen [16], Zabadal and Dittmer [57], and Casanova et al [23], who showed that gibberellic acid application exerted a significant effect on berry weight
The application in in thethe grapevine culThe application of ofthe thehormonization hormonizationtreatment treatment grapevine tivar had a significant effect on yield quantity and quality

Summary

Introduction

Of all the grapes produced in the world, 80% of the harvest is used to make wine, 13% are dessert grapes, and the rest are used to make raisins [1]. A prerequisite for the profitability of dessert grape production is to adapt the size of its fruits to the high demands of the market, i.e., to obtain the best quality. An important attribute of dessert grapes is the absence of seeds [2]. Of all the seedless cultivars known in Poland and recommended for outdoor cultivation, ‘Einset Seedless’ is the best, mainly due to its prolificacy, frost resistance, and berry flavor. The fruits of this variety can be used for raisin production and fresh consumption as dessert grapes. The natural berry weight of ‘Einset Seedless’ (±2 ÷ 3 g) is not sufficient for commercial use as table grapes [3]

Objectives

Methods

Conclusion