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Grapefruit Tree

Welcome to our grapefruit tree pictures page.

Grapefruit Trees

On this page you will find lots of nice pictures of grapefruit trees.

You will also find a lot of wonderful information on grapefruit trees, including information about the grapefruit tree species, planting information, and much more.

This is valuable and useful information that can help you to learn more about the grapefruit tree.

Grapefruit Tree Images

To view each grapefruit tree picture in full size just click on the pictures.

Enjoy these pictures of the grapefruit tree.

Grapefruit Tree Photo Gallery

Grapefruit Crop	Grapefruit	Grapefruit Tree

Grapefruit Tree: Info and Facts on Grapefruit Trees

Here is some general information on the grapefruit tree.

The grapefruit, is a subtropical citrus tree known for its sour fruit, an 18th-century hybrid first bred in Barbados. When found, it was named the "forbidden fruit"; it has also been misidentified with the pomelo or shaddock (C. maxima), one of the parents of this hybrid, the other being sweet orange.

These evergreen trees are usually found at around 5 to 6 metres (16 to 20 ft) tall, although they can reach 13 to 15 metres (43 to 49 ft). The leaves are dark green, long (up to 150 mm, or 6 inches) and thin. It produces 5 cm (2 in) white four-petaled flowers. The fruit is yellow-orange skinned and largely an oblate spheroid; it ranges in diameter from 10 to 15 cm. The flesh is segmented and acidic, varying in color depending on the cultivars, which include white, pink and red pulps of varying sweetness. The 1929 US Ruby Red (of the Redblush variety) has the first grapefruit patent.

The fruit has become popular since the late 19th century; before that it was only grown as an ornamental plant. The United States quickly became a major producer of the fruit, with orchards in Florida, Texas, Arizona, and California. In Spanish, the fruit is known as toronja or pomelo. One ancestor of the grapefruit was the Jamaican sweet orange (Citrus sinensis), itself an ancient hybrid of Asian origin; the other was the Indonesian pomelo (C. maxima). One story of the fruit's origins is that a certain "Captain Shaddock" brought pomelo seeds to Jamaica and bred the first fruit. But it probably originated as a naturally-occurring hybrid.

The United States is the top producer of grapefruit and pomelo followed by China and South Africa.

Grapefruit comes in many varieties, determinable by color, which is caused by the pigmentation of the fruit in respect of both its state of ripeness. The most popular varieties cultivated today are red, white, and pink hues, referring to the internal pulp color of the fruit. The family of flavors range from highly acidic and somewhat bitter to sweet and tart. Grapefruit mercaptan, a sulfur-containing terpene, is one of the substances which has a strong influence on the taste and odor of grapefruit, compared with other citrus fruits.

Grapefruit can have a number of interactions with drugs, often increasing the effective potency of compounds. In the field of polyphenolic compounds, grapefruit contains the flavanone naringin, alongside the two furanocoumarins bergamottin and dihydroxybergamottin, which inhibit the protein isoform CYP3A4 predominately in the small intestine, but at higher doses, hepatic CYP3A4 inhibition is present as well.
Unlike other fruits, grapefruit contains a large amount of naringin, and it can take up to 72 hours before the effects of the naringin on the CYP3A4 enzyme are seen. This is particularly problematic due to the fact that only 4 oz of grapefruit contain enough naringin to inhibit substrates of CYP3A4.

Grapefruit is an excellent source of many nutrients and phytochemicals that contribute to a healthy diet. Grapefruit is a good source of vitamin C, contains the fiber pectin, and the pink and red hues contain the beneficial antioxidant lycopene. Studies have shown grapefruit helps lower cholesterol, and there is evidence that the seeds have antioxidant properties. Grapefruit forms a core part of the "grapefruit diet", the theory being that the fruit's low glycemic index is able to help the body's metabolism burn fat. Grapefruit peel oil is used in aromatherapy and it is historically known for its aroma.

Grapefruit has also been investigated in cancer medicine pharmacodynamics. Its inhibiting effect on the metabolism of some drugs may allow smaller doses to be used, which can help to reduce costs.

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