Fruit Quality of Redhaven and Royal Glory Peach Cultivars on Seven Different Rootstocks

Abstract

Two peach cultivars, Redhaven and Royal Glory, grafted on seven different rootstocks (Adesoto, Barrier 1, GF 677, Ishtara, Monegro, Penta, and peach seedling) were analyzed for tree vigor and yield. Fruit of similar ripeness (fruit firmness) was analyzed in terms of pomological (fruit weight, soluble solids content) and biochemical parameters (individual sugars, organic acids, phenolic acids in the flesh and peel, as well as flavonols and anthocyanins in the peel). A uniform effect of rootstock on tree size was evident in the cases of both cultivars. The Ishtara rootstock induced weak tree growth; Adesoto, Penta and peach seedling semivigorous growth; and Barrier 1, GF 677, and Monegro vigorous tree growth. We recorded higher yields in the Redhaven cultivar, while no significant differences in yield in the fourth growing season were found among the rootstocks for each cultivar. Rootstock had no effect on soluble solids in the Redhaven cultivar, while in the Royal Glory it did. Penta yielded the highest soluble solids content levels, while Adesoto and Monegro were associated with low levels. In the fruit from both cultivars, the rootstock had a significant influence on individual sugars, organic acids, and phenolic acids in the pulp. We also found that phenolic acids in the pulp and skin were more affected by the rootstock than other secondary metabolites analyzed, regardless of the cultivar.

Phenolic Profile and Antioxidant Activity of Pulp and Peel from Peach and Nectarine Fruits

“…Phenolic acids are maturity dependent (Concalves et al, 2004). Due to the fact that fruits from each cultivar were of similar ripeness and the same geographical region, observed differences can only be attributed to the cultivar, which is in accordance with the previous studies on peach (Orazem et al, 2011).…”

“…Obtained contents are similar to those from the previous studies (Tomas-Barberan et al, 2001;Cantin et al, 2009). However, they are higher compared to those reported by Orazem et al (2011). Differences occurred due to different extraction and analysis methods.…”

“…for pulps and 14.9-30.4 mg GAE/100 g f.w. for peels, respectively) (Orazem et al, 2011). However, Chang et al (2000) showed that the total phenolic contents in pulps and peels of peach fruits were in the range 41.5-76.5 mg GAE/100 g f.w.…”

“…Various solvent systems have been used for the extraction of polyphenols from plant materials. Water and aqueous mixture of ethanol (Gorinstein et al, 2002), methanol (Orazem et al, 2011;Manzoor et al, 2012a) and acetone (Hamauzu et al, 2006) are commonly used. Alothman et al (2009) reported that aqueous acetone was superior to methanol and ethanol in the extraction of phenols from fruits.…”

Antioxidant activity and sensory changes of strawberry tree fruits during cold storage and shelf life

“…Ascorbic acid (AA) was extracted as described by Serçe et al (2011) and analysed (Orazek et al 2011) using a HPLC System (110 Series; Agilent Technologies, Palo Alto, USA). The peak for AA was identified and quantified using external standards.…”