An appressorium is a specialized cell typical of many fungal plant pathogens that is used to infect host plants. It is a flattened, hyphal `pressing` organ, from which a minute infection peg grows and enters the host, using turgor pressure capable of punching through even Mylar. Following spore attachment and germination on the host surface, the.....
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http://en.wikipedia.org/wiki/Appressorium
An enlargement on a hypha or germ tube that attaches itself to the host before penetration takes place. (Pl.
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http://ppathw3.cals.cornell.edu/glossary/Defs_A.htm
(from the article `fungus`) ...the tube enters the host, puts out branches between the cells of the host, and forms a mycelial network within the invaded tissue. The germ tubes ...
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http://www.britannica.com/eb/a-z/a/91
a flattened and thickened tip of a hyphal branch, formed by some parasitic fungi, that facilitates penetration of the host plant.
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https://www.infoplease.com/dictionary/appressorium
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