eyespot

eyespot

eyespot
1. In certain unicellular algae, an organelle consisting of closely packed lipid globules (usually or always containing orange or red carotenoids); it is generally believed to be involved in phototaxis.

2. A disease of cereals caused by the fungus Pseudocercosporella herpotrichoides. Initially a dark smudge appears on the outer leaf-sheath, then an oval ‘eye-shaped’ lesion develops near the base of the plant, weakening the stem and leading to increasing susceptibility to lodging (i.e. being laid flat by weather). A similar disease, called sharp eyespot, is caused by Rhizoctonia solari.

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MICHAEL ALLABY. "eyespot." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "eyespot." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O7-eyespot.html

MICHAEL ALLABY. "eyespot." A Dictionary of Plant Sciences. 1998. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-eyespot.html

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eyespot

eyespot (stigma)
1. A structure found in some free-swimming unicellular algae and in plant reproductive cells that contains orange or red pigments (carotenoids) and is sensitive to light. It enables the cell to move in relation to a light source (see phototaxis).

2. A spot of pigment found in some lower animals, e.g. jellyfish.

3. An eyelike marking on the wings of certain insects, which is revealed in startle displays.

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"eyespot." A Dictionary of Biology. 2004. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>.

"eyespot." A Dictionary of Biology. 2004. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O6-eyespot.html

"eyespot." A Dictionary of Biology. 2004. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-eyespot.html

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Free newspaper and magazine articles

Eyespot deficits stymie peacocks: females appear to require a minimum number...
Magazine article from: Science News; 5/21/2011
Eyespot and Takeall rear their heads.(Farming Life)
Newspaper article from: The News Letter (Belfast, Northern Ireland); 8/2/2003
Research aims to curb eyespot.(News)
Newspaper article from: The News Letter (Belfast, Northern Ireland); 9/9/2000

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