nectar comes from glands called nectaries in a flower.
nectar comes from glands called nectaries in a flower.
where does nectar come from in a flower?
glands called nectaries
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 mosquitoes, hoverflies, wasps, bees, butterflies and moths, hummingbirds, honeyeaters 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
the effect of floral-nectar robbing on plant fitness depends on several issues. firstly, nectar robbers such as carpenter bees, bumble bees and some birds can pollinate flowers. pollination may take place when the body of the robber contacts the reproductive parts of the plant while it robs, or during pollen collection which some bees practice in concert with nectar robbing. the impact of "trigona" bees (e.g. "trigona ferricauda") on a plant is almost always negative, probably because their aggressive territorial behaviour effectively evicts legitimate pollinators. nectar robbers may change the behaviour of legitimate pollinators in other ways, such as by reducing the amount of nectar available. this may force pollinators to visit more flowers in their nectar foraging. the increased number of flowers visited and longer flight distances increase pollen flow and outcrossing, which is beneficial for the plant because it lessens inbreeding depression. this requires a robber's not completely consuming all of a flower's nectar. when a robber consumes all of a flower's nectar, legitimate pollinators may avoid the flower, resulting in a negative effect on plant fitness.
nectar robbing