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eyespot |
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eyespot [′ī‚spät]
(botany) A small photosensitive pigment body in certain unicellular algae. A dark area around the hilum of certain seeds, as some beans. (invertebrate zoology) A simple organ of vision in many invertebrates consisting of pigmented cells overlying a sensory termination. (plant pathology) A fungus disease of sugarcane and certain other grasses which is caused byHelminthosporium sacchariand characterized by yellowish oval lesions on the stems and leaves. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | Eyespots are light-sensitive patches that allow simple organisms, such as jellyfish and some other algae, to sense their environments. For example, Marion Petrie of Newcastle University in England and a colleague turned the same birds from hotties to notties and back again by clipping some of the eyespots out of the males' tails and then reattaching the finery. After eyespots became apparent, 10 additional embryos were photographed with the eyespot centrally positioned, and L and W of the pigmented eyespots (eL and eW, respectively) were measured. |
Eyespots |
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