AUTORADIOGRAPHIC LOCALIZATION OF 45Ca AND 36Cl AFTER POSTHARVEST DIPPING OF APPLE FRUITS

1980 ◽  
pp. 334-336 ◽  
Author(s):  
J. WIENEKE
Keyword(s):  
Apple Fruits

Variation of Phytochemicals Content in Pulp and Skin of Seven Romanian Apple Cultivars

2017 ◽  
Vol 68 (3) ◽  
pp. 474-477
Author(s):  
Lacramioara Oprica ◽  
Doina Atofanei ◽  
Vladimir Poroch
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Anthocyanin Content ◽  
Colour Intensity ◽  
Total Polyphenol ◽  
Valuable Source ◽  
Golden Delicious ◽  
Apple Cultivars ◽  
Apple Fruits

The amounts of anthocyanins, flavonoids, total polyphenol and ascorbic acid in seven apple cultivars from Romania were investigated. The amounts of polyphenol and flavonoids in pulp and skin of apple cultivars ranged between 17.18�7.52 mg GAE/g DW and 20.10�11.06 mg CE/g DW as well as 3.64�1.18 mg GAE/g DW and 10.31�5.57 mg CE/g DW, respectively. The highest and smallest values of ascorbic acid both in the skin and the pulp were observed in the cultivars Mutsu and Starkrimson. The anthocyanin content is positively correlated with the colour intensity of the apple epicarp, being about three-fold higher in Prima than Golden Delicious cultivar. The better antioxidant activity provided by the content of polyphenol, ascorbic acid and flavonoids was in apple fruits of Mutsu cultivar and for this reason it should be regarded as a valuable source of antioxidants.

Effect of 4-hexylresorcinol on post-cut browning and quality of minimally processed ‘Fuji’ apple fruits

2020 ◽  
Vol 14 (5) ◽  
pp. 2461-2471
Author(s):  
Jardel Araujo Ribeiro ◽  
Rufino Fernando Flores Cantillano ◽  
Fabiana Roos Nora ◽  
Leonardo Nora
Keyword(s):  
Minimally Processed ◽  
Fuji Apple ◽  
Apple Fruits

Etude ultrastructurale des relations hôte–parasite au cours de l'infection des pommes par le Phytophthora cactorum

1981 ◽  
Vol 59 (2) ◽  
pp. 251-263 ◽  
Author(s):  
X. Mourichon ◽  
G. Sallé
Keyword(s):  
Cell Walls ◽  
Susceptible Variety ◽  
Host Cells ◽  
Phytophthora Cactorum ◽  
Electron Microscopic ◽  
Susceptible Host ◽  
Golden Delicious ◽  
Extrahaustorial Matrix ◽  
Apple Fruits

An electron microscopic study was performed on haustoria of Phytophthora cactorum (L. et C.) Schroeter developed in tissues of two cultivars of apple fruits: a susceptible variety ('Golden delicious') and a resistant one ('Belle de Boskoop'). Ultrastructure of intercellular hyphae and some aspects of their penetration between contiguous host cells were described. A light dissolution of the host cell walls was observed. Ontogenic investigations indicated that in the susceptible host, the wall of the fungal haustoria was covered with a dense-stained extrahaustorial matrix. Its origin and its polysaccharide nature were demonstrated. On the other hand, the resistant host developed, immediately after the inoculation, a papilla which gave rise, later on, to a sheath enclosing adult haustoria. The role of these callosic structures in the phenomenon of resistance was discussed.

scholarly journals Identification of Fusarium Species Isolated From Stored Apple Fruit in Croatia / Identifikacija Vrsta Roda Fusarium Izoliranih S Plodova Jabuke Nakon Skladištenja

2012 ◽  
Vol 63 (4) ◽  
pp. 463-470 ◽  
Author(s):  
Zdravka Sever ◽  
Dario Ivić ◽  
Tomislav Kos ◽  
Tihomir Miličević
Keyword(s):  
Fusarium Species ◽  
Morphological Characteristics ◽  
Molecular Data ◽  
Apple Fruit ◽  
Fusarium Avenaceum ◽  
Human Consumption ◽  
Low Oxygen ◽  
Fusarium Rot ◽  
Pathogenicity Tests ◽  
Apple Fruits

AbstractSeveral species of the genus Fusarium can cause apple fruit to rot while stored. Since Fusarium taxonomy is very complex and has constantly been revised and updated over the last years, the aim of this study was to identify Fusarium species from rotten apples, based on combined morphological characteristics and molecular data.We identified 32 Fusarium isolates from rotten apple fruit of cultivars Golden Delicious, Jonagold, Idared, and Pink Lady, stored in Ultra Low Oxygen (ULO) conditions. Fusarium rot was detected in 9.4 % to 33.2 % of naturally infected apples, depending on the cultivar. The symptoms were similar in all four cultivars: a soft circular brown necrosis of different extent, with or without visible sporulation. Fusarium species were identified by the morphology of cultures grown on potato-dextrose agar (PDA) and carnation leaf agar (CLA). Twenty one isolates were identified as Fusarium avenaceum and confirmed as such with polymerase chain reaction (PCR) using specific primer pair FA-ITSF and FA-ITSR. F. pseudograminearum,F. semitectum, F. crookwellense, and F. compactum were identified by morphological characteristics. F.avenaceum can produce several mycotoxins and its dominance in Fusarium rot points to the risk of mycotoxin contamination of apple fruit juices and other products for human consumption. Pathogenicity tests showed typical symptoms of Fusarium rot in most of the inoculated wounded apple fruits. In this respect Fusarium avenaceum, as the dominant cause of Fusarium rot in stored apple fruits is a typical wound parasite.

Triterpenes induced by young apple fruits in response to herbivore attack

2021 ◽  
Author(s):  
Yuto Ohata ◽  
Yuuki Tetsumoto ◽  
Sayo Morita ◽  
Naoki Mori ◽  
Yoichi Ishiguri ◽  
...  
Keyword(s):  
Malus Domestica ◽  
Spodoptera Litura ◽  
Mechanical Damage ◽  
Antifeedant Activity ◽  
Varietal Differences ◽  
Triterpene Acids ◽  
Lepidopteran Insect ◽  
Pest Insects ◽  
Herbivore Attack ◽  
Apple Fruits

Abstract Apples Malus domestica, known as a rich source of triterpene acids, induced more variety and quantity of triterpene acids in response to herbivory or mechanical damage. There were three major induced compounds: pomaceic acid and euscaphic acid, both of which are known apple triterpene acids, and 2α,19α-dihydroxy-3-oxours-12-en-28-oic acid (named eriobotoric acid), which was first identified in apples. In this study, the three compounds’ induction curves after damage, varietal differences in induction amounts, and physiological roles against pest insects were further investigated. Eriobotoric acid showed clear antifeedant activity against lepidopteran insect Spodoptera litura but not against apple pests.

scholarly journals Estimation of Postharvest Quality of “Red Delicious” Apple Fruits Based on Fruit Nutrient Elements Composition

2016 ◽  
Vol 9 (1) ◽  
pp. 164
Author(s):  
Mahshid Doryanizadeh ◽  
Mahmood Ghasemnezhad ◽  
Atefeh Sabouri
Keyword(s):  
Respiration Rate ◽  
Cold Storage ◽  
Ethylene Production ◽  
Storage Time ◽  
Postharvest Quality ◽  
Mineral Nutrient ◽  
Nutrient Elements ◽  
Total Anthocyanin ◽  
Positive Significant Correlation ◽  
Apple Fruits

<p>Fruit nutrient elements content during harvest could considerably effect on postharvest life of apples. In this study, apple fruits cultivar Red Delicious were harvested at the commercial maturity stage at 20 commercial orchards. Fruits were divided into three groups according to peel color; dark red, medium and light red. The mineral elements nutrient content such as nitrogen, phosphorus, potassium, calcium and magnesium and their ratios were measured in the harvested fruits. Thereafter, fruits were places in the cold storage at 0 °C and relative humidity of 90% for 4 months. The characteristics such as fruits weight loss, firmness, TSS, dry matter, total anthocyanin content, antioxidant activity, respiration rate and ethylene production were measured at the end of storage. The results showed a positive significant correlation between fruit firmness at the end of storage time with N+K:Ca, K+Mg:Ca, K:Ca and Mg:Ca ratios. Furthermore, a negative significant correlation was found between total anthocyanin with Nitrogen content, Mg:Ca and N:Ca ratios. The results also showed a positive significant correlation between fruit respiration rate and Nitrogen, N+K:Ca and N:Ca ratios. The analysis of regression based on mean values of three red apple groups showed a significant negative correlation between total anthocyanin with fruit ethylene production at the storage time and Mg:Ca ratio. The relationship between these two variables and Anthocyanin was expressed by the equation of regression: Anthocyanin = 100.22–1.651 Ethylene–43.963 Mg:Ca. Overall, the results confirm that measurement of fruit mineral composition during harvest time could be a strategy for predicting postharvest behaviors of apple fruits at the cold storage. Also the results showed that a relationship between mineral nutrient composition and the characteristics such as firmness, anthocyanin, respiratory rate in apple fruits.</p>

scholarly journals N-Malonyl-d-tryptophan in Apple Fruits Treated with Succinic Acid 2,2-Dimethylhydrazide

1970 ◽  
Vol 46 (1) ◽  
pp. 123-125 ◽  
Author(s):  
M. W. Williams ◽  
E. A. Stahly
Keyword(s):  
Succinic Acid ◽  
Apple Fruits
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