Compare polenisation types

World > Nature
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2013-10-21 20:53:32
Compare Insect Pollinated vs Wind Pollinated
Insect PollinatedWind Pollinated
PerianthDull colours Reduced or absent petals and sepals No scent or nectar is producedBright colors - may be specific for the type of insect. Large, conspicuous petals and/or sepals The flowers produce scent to attract the insects. Nectar may be produced as a food reward. Nectar is high in sugars and is produced at the base of the flower to increase the chances of the insect moving against the anthers and stigma. Some insects, such as beetles, feed on the petals.
FlowerMany of the plants have the male and female flowers separate - either on different plants (dioecious) or separate on the same plant (monoecious) Many small flowers are grouped in an inflorescence positioned above the foliageMany are bisexual flowers - each visit by the insect is more efficient because the insect can both pick up and deliver pollen. Varieties of floral shape and size. Some orchids have elaborate shapes that mimic female insects.
StamensWell exposed stamens - sometimes due to long filaments Masses of pollen produced Pollen exine is smooth and the pollen does not stick togetherPollen grains may be packed with starch or oils and thus are an important source of food. Less pollen is produced. The exine of the pollen is contoured and shaped to help it cling to the insect. The structure of the exine is specific for the various plant groups and is used as a diagnostic feature.
PistilLarge, exposed stigmas, often with a feathery appearance - the branches can intercept the pollen Single ovulesThe stigma is within the perianth - the insect is forced to move against stigma when moving inside the perianth. Simple or compound carpels are present.
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  • 2013-10-20 16:49:29
    2013-10-21 20:53:32
  • Nature
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  • Compare Insect Pollinated vs Wind Pollinated
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