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nectar : ウィキペディア英語版
nectar

Nectar is a sugar-rich liquid produced by plants in glands called nectaries, either within the flowers with which it attracts pollinating animals, or by extrafloral nectaries, which provide a nutrient source to animal mutualists, which in turn provide antiherbivore protection. Common nectar-consuming pollinators include bees, butterflies and moths, hummingbirds, and bats. Nectar plays an important role in the foraging economics and overall evolution of nectar-eating species; for example, nectar and its properties are responsible for the differential evolution of the African honey bee, ''A. m. scutellata'' and the western honey bee.
Nectar is an ecologically important item, the sugar source for honey. It is also useful in agriculture and horticulture because the adult stages of some predatory insects feed on nectar. For example, the social wasp species ''Apoica flavissima'' relies on nectar as a primary food source. In turn, these wasps then hunt agricultural pest insects as food for their young. For example, thread-waisted wasps (genus ''Ammophila'') are known for hunting caterpillars that are destructive to crops.
Nectar secretion increases as the flower is visited by pollinators. After pollination, the nectar is frequently reabsorbed into the plant.〔
==Etymology==
Nectar is derived from Greek ''nectar'', the favored drink of the gods, which in turn is the Latinized version of its current meaning, "sweet liquid in flowers," established in AD 1600.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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