Lower Crop Load for Cv. Jonagold Apples (<i>Malus</i>×<i>domestica</i>Borkh.) Increases Polyphenol Content and Fruit Quality

Stopar, M.; Bolcina, Uros; Vanzo, and Andreja; Vrhovšek, Urška

doi:10.1021/jf011018b

Cited by 47 publications

(35 citation statements)

References 18 publications

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“…In this study, both conventional and organic plums were grown in the same farm, this allowed the variability due to the location of the farm, length of insolation, climate, choice of cultivar, factors which strongly influence the content and the composition of these compounds in fruits (28,29,30,31,32), to be overcome. Our results showed that the differences in phenolics concentration among cultivations became appreciable when the organic cultivations were performed with different soil managements.…”

Section: Resultsmentioning

confidence: 99%

Nutrients and Antioxidant Molecules in Yellow Plums (Prunus domestica L.) from Conventional and Organic Productions: A Comparative Study

Lombardi‐Boccia

Lucarini

Lanzi

et al. 2003

J. Agric. Food Chem.

184

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Yellow plums (Prunus domestica L) conventionally and organically grown in the same farm were selected to study the influence of different agronomic practices on antioxidant vitamins (ascorbic acid, vitamin E, beta-carotene) and phenolics (total polyphenols, phenolic acids, flavonols) concentration. Conventional plums were grown on tilled soil. Three organic cultivations were performed: tilled soil, soil covered with trifolium, and soil covered with natural meadow. Differences in macronutrients were marginal, whereas antioxidant vitamins and phenolic compounds concentration markedly differed among cultivations. Ascorbic acid, alpha-, gamma-tocopherols, and beta-carotene were higher in organic plums grown on soil covered with natural meadow. The highest phenolic acids content was detected in plums grown on soil covered with trifolium. Total polyphenols content was higher in conventional plums. Quercetin was higher in conventional plums, but myrecitin and kaempferol were higher in organic plums. Under the same cultivar and climate conditions, the type of soil management turned out of primary importance in influencing the concentration of health-promoting compounds.

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Section: Resultsmentioning

confidence: 99%

Nutrients and Antioxidant Molecules in Yellow Plums (Prunus domestica L.) from Conventional and Organic Productions: A Comparative Study

Lombardi‐Boccia

Lucarini

Lanzi

et al. 2003

J. Agric. Food Chem.

184

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“…However, crop load made little or no difference for most individual polyphenol compounds [measured by high-performance liquid chromatography (HPLC)] in the peel of either cultivar. Using whole fruit samples, Stopar et al (2002) found that when 'Jonagold' crop load increased by 80%, the concentration of total polyphenols (measured by FC) decreased by 30%, as did red peel color, sugars, and flesh firmness. The study also analyzed individual polyphenols such as catechin and epicatechin (measured by HPLC) which showed a decrease of 178% and 71%, respectively, between their lowest (30 fruits per tree) and highest crop load (157 fruits per tree) treatments.…”

Section: Resultsmentioning

confidence: 99%

Crop Load Density Affects ‘York’ Apple Juice and Hard Cider Quality

Peck¹,

McGuire²,

Boudreau³

et al. 2016

horts

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Additional index words. Malus 3domestica, phenolic, polyphenol, tannin, titratable acidity, yeast assimilable nitrogen Abstract. To assess the impact crop load has on hard cider chemistry, 'York' apple (Malus 3domestica Borkh.) trees were hand thinned to three different crop loads: low [two apples per cm 2 branch cross-sectional area (BCSA)], medium (four apples per BCSA), and high (six apples per BCSA). Higher crop loads produced smaller, less acidic fruit that were slightly more mature. In juice made from fruit from these treatments, the total polyphenol content did not differ at harvest, but, after fermentation, the medium crop load had 27% and the high crop load had 37% greater total polyphenol content than the low crop load. Yeast assimilable nitrogen (YAN) concentration in juice made from fruit from the low crop load treatment had 18% and 22% greater than the medium and high crop load, respectively. YAN concentrations in juice from the medium and high crop load treatments were similar. Our results provide apple growers and hard cider producers with a better understanding of how apple crop load impacts YAN concentrations in juice and total polyphenol concentrations in juice and cider.

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“…For example, Stopar et al (2002) reported a decrease in fruit polyphenol concentration with increased apple ( Malux × domestica Borkh.) fruit set, and Spayd et al (1986) reported a decrease in fruit acid, anthocyanin, and sugar concentrations with increased sweet cherry ( Prunus avium L.) fruit set.…”

Section: Discussionmentioning

confidence: 99%

Phenotypic Characteristics as Predictors of Phytosterols in Mature Cycas micronesica Seeds

Marler¹,

Shaw²

2009

horts

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The relationship between mature Cycas micronesica K.D. Hill seed sterol concentration and content and plant or seed phenotypic characteristics was established by multiple regression. Combined models were significant for free but not glycosylated sterols. Reduced models revealed leaf number as the only significant predictor. Free and glycosylated sterol concentrations were unaffected throughout the range of several predictors: tree height (1.7 to 5.8 m), seed fresh weight (48 to 120 g), seed load (one to 76 seeds per plant), and estimated tree age (32 to 110 years). The free and glycosylated sterol phenotypes were also not dependent on the presence/absence of developed embryos in mature seeds. The significant response to leaf number was subtle with an increase of 43 leaves associated with a 0.1-mg increase in free sterol per gram seed fresh weight. This is the first report for any cycad that discusses reproductive or physiological traits in the context of allometric relations. Results indicate a highly constrained phenotypic plasticity of Cycas gametophyte sterol and steryl glucoside concentration and seed content in relation to whole plant and organ size variation.

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Lower Crop Load for Cv. Jonagold Apples (Malus×domesticaBorkh.) Increases Polyphenol Content and Fruit Quality

Cited by 47 publications

References 18 publications

Nutrients and Antioxidant Molecules in Yellow Plums (Prunus domestica L.) from Conventional and Organic Productions: A Comparative Study

Nutrients and Antioxidant Molecules in Yellow Plums (Prunus domestica L.) from Conventional and Organic Productions: A Comparative Study

Crop Load Density Affects ‘York’ Apple Juice and Hard Cider Quality

Phenotypic Characteristics as Predictors of Phytosterols in Mature Cycas micronesica Seeds

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