Abstract
Postharvest pitting of citrus fruit is a recently defined peel disorder that is caused by high-temperature storage (>10°C) of waxed fruit. We examined the anatomy of pitted white grapefruit peel to improve our understanding of this disorder and assist in its diagnosis. Scanning, light, and transmission micrographs showed that postharvest pitting is characterized by the collapse of oil glands. Cells enveloping the oil glands are the cells of primary damage. Oil gland rupture may occur anywhere around the oil gland, but often occurs in regions farthest from the epidermal cells. Adjacent parenchyma cells are damaged as the oil spreads. Epidermal and hypodermal cells are often damaged during severe oil gland collapse. In contrast, chilling injury is characterized by the collapse of epidermal and hypodermal cells. Oil glands are affected only in severe cases of chilling injury. Oleocellosis (oil spotting) is often characterized by the collapse of epidermal and hypodermal cells, but cells enveloping the oil gland are typically not damaged. Physical damage is characterized by damage of epidermal cells, a wound periderm, and presence of secondary pathogens.
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Claims 10
Claim · model-written summary
Postharvest pitting is characterized by the collapse of oil glands.
Verbatim
t0“White Grapefruit”
e1“Scanning, light, and transmission micrographs showed that postharvest pitting is characterized by the collapse of oil glands”
Claim · model-written summary
Cells enveloping the oil glands are the cells of primary damage in pitting.
Verbatim
t0“White Grapefruit”
e2“Cells enveloping the oil glands are the cells of primary damage”
Claim · model-written summary
Oil gland rupture in pitting may occur anywhere around the oil gland and often occurs farthest from the epidermal cells.
Verbatim
t0“White Grapefruit”
e3“Oil gland rupture may occur anywhere around the oil gland, but often occurs in regions farthest from the epidermal cells”
Claim · model-written summary
Adjacent parenchyma cells are damaged as the oil spreads in pitting.
Verbatim
t0“White Grapefruit”
e4“Adjacent parenchyma cells are damaged as the oil spreads”
Claim · model-written summary
Epidermal and hypodermal cells are often damaged during severe oil gland collapse.
Verbatim
t0“White Grapefruit”
e5“Epidermal and hypodermal cells are often damaged during severe oil gland collapse”
Claim · model-written summary
Chilling injury is characterized by the collapse of epidermal and hypodermal cells.
Verbatim
t0“White Grapefruit”
e6“In contrast, chilling injury is characterized by the collapse of epidermal and hypodermal cells”
Claim · model-written summary
Oil glands are affected in chilling injury only in severe cases.
Verbatim
t0“White Grapefruit”
e7“Oil glands are affected only in severe cases of chilling injury”
Claim · model-written summary
Oleocellosis is often characterized by the collapse of epidermal and hypodermal cells.
Verbatim
t0“White Grapefruit”
e6“Oleocellosis (oil spotting) is often characterized by the collapse of epidermal and hypodermal cells”
Claim · model-written summary
In oleocellosis, cells enveloping the oil gland are typically not damaged.
Verbatim
t0“White Grapefruit”
e7“cells enveloping the oil gland are typically not damaged”
Claim · model-written summary
Physical damage is characterized by damage of epidermal cells, a wound periderm, and presence of secondary pathogens.
Verbatim
t0“White Grapefruit”
e1“Physical damage is characterized by damage of epidermal cells, a wound periderm, and presence of secondary pathogens”