High-density apple (Malus domestica) orchard management techniques and productivity were evaluated on an old orchard replant site in North Carolina. Trees were planted at 5 × 10 ft (1.5 × 3.0 m), giving a tree density of 871 trees/acre (2152 trees/ha). Well-branched ‘Smoothee Golden Delicious’ trees on ‘Mark’ rootstock were planted in 1990. Orchard-management factors which increased cumulative ...

The color and polyphenol oxidase (PPO) activity of fresh-cut Golden delicious apples were evaluated throughout cold storage under modified atmospheres. The shelf life of cut apples was extended to several weeks, especially when an initial atmosphere of 90.5% N(2) + 7% CO(2) + 2.5% O(2) and plastic pouches of 30 cm(3)/cm(2) x bar x 24 h were used. Under these conditions, a maximum 62% PPO activi...

Biocontrol of postharvest decay on apples could provide an alternative approach for chemical control. With the effort to look for effective biocontrol agents, Bacillus pumilus (B19), B. subtilis (B11), B. cereus (B16), B. subtilis (B11), B. cereus (B17), B. brevis (EN63-1) and B. licheniformis (EN74-1) were tested for their potential activity against gray mold caused by Botrytis mali on Golden ...

Ethylene-forming enzyme (EFE) was isolated from apple (Malus domestica Borkh. cv Golden Delicious) fruit tissue. The enzyme activity in the homogenate is associated with the pellet fraction and can be solubilized with Triton X-100 or polyvinylpolypyrrolidone. The solubilized enzyme system resembles the in vivo system in that it exhibits a low K(m) (17 micromolar) for its substrate 1-aminocyclop...

Visible/near-infrared spectroscopy combined with chemometric methods has been widely used in fruit quality detection. In order to ensure the performance of prediction model, calibration samples train model should cover range variability anticipated samples. However, this requirement is difficult meet practice, especially, for detection from cross-years variational cultivation conditions, climat...

This study aimed to investigate the biochemical compounds of five different apple cultivars (Amasya, Braeburn, Golden Delicious, Granny Smith, and Starking) grown in same location reveal differences between peel pulp fresh, oven-dried, sun-dried samples. Sugar organic acid contents were analyzed through high-performance liquid chromatography. Besides, antioxidant activity, total flavonoid, phen...

Shi, Biying. M.S., Purdue University, May 2015. Growth Parameters for 'Golden Delicious' Apple Trees (Malus × domestica Borkh.). Major Professor: Peter Hirst. High yield and high quality of tree fruit result from appropriate orchard design and management practices. This requires an accurate knowledge of vegetative growth, branching, and flowering processes of fruit trees. Tree development knowl...

‘Golden Delicious’ apples (Malus domestica Borkh) were pressure-infiltrated at harvest with a 4% CaCl2 solution either without prior heat treatment or following 4 days at 38C. Examination of the apple surfaces from both treatments by low-temperature scanning electron microscopy revealed that heat treatment changed the pattern of epicuticular wax. The epicuticular wax of nonheated fruit exhibite...

Polygalacturonase (PG) was extracted and purified from decayed 'Golden Delicious' apple fruit inoculated with Penicillium solitum. Ammonium sulfate, gel filtration, and cation exchange chromatography were used to purify the enzyme. Both chromatographic methods revealed a single peak corresponding to PG activity. The purified PG most likely originates from the fungus because PG activity from hea...