Citrus is a genus of flowering trees and shrubs in the rue family, Rutaceae.
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12 Facts About Citrus
2.
The genus Citrus is native to South Asia, East Asia, Southeast Asia, Melanesia, and Australia.
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3.
Citrus plants are native to subtropical and tropical regions of Asia, Island Southeast Asia, Near Oceania, and northeastern Australia.
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4.
Citrus species began to diverge from a common ancestor about 15 million years ago, at about the same time that Severinia diverged from the same ancestor.
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5.
Three ancestral species in the genus Citrus associated with modern Citrus cultivars are the mandarin orange, pomelo, and citron.
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6.
Citrus fruits are notable for their fragrance, partly due to flavonoids and limonoids contained in the rind, and most are juice-laden.
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7.
Citrus fruits are nonclimacteric and respiration slowly declines and the production and release of ethylene is gradual.
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8.
Citrus fruits pass from immaturity to maturity to overmaturity while still on the tree.
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9.
Citrus trees grown in tubs and wintered under cover were a feature of Renaissance gardens, once glass-making technology enabled sufficient expanses of clear glass to be produced.
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10.
Citrus plants are sensitive to excessive salt in the soil.
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11.
Some Citrus species contain significant amounts of the phytochemical class called furanocoumarins, a diverse family of naturally occurring organic chemical compounds.
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12.
Genus Citrus has been suggested to originate in the eastern Himalayan foothills.
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