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Summary
DescriptionParasitism of pythium debaryanum hesse on the potato tuber 415.jpg
English: PLATE
37
PHYSIOLOGICAL STUDY OF THE PARASITISM OF
PYTHIUM DEBARYANUM HESSE ON THE POTATO
TUBER by Lon A. Hawkins and Rodney B. Harvey, Journal of Agricultural Research voi. xviii, no. 5
Photographs enlarged from portions of a motion photomicrograph, showing the method of cell wall penetration by Pythium hyphae.
A. — Shows the hypha growing against the potato cell wall. Sufficient pressure has already been applied to cause the hypha to bend. Notice that this bending increases in later photographs.
B. — A little later stage than A.
C. — The tip has broken through as a small tube
D. — Penetration is complete. Notice the constriction of the hypha at the point where it penetrates the potato cell wall.
Lon A. Hawkins, Rodney b. Harvey, United States. Dept. of Agriculture; Association of American Agricultural Colleges and Experiment Stations; Association of Land-Grant Colleges and Universities; Association of Land-Grant Colleges
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Public domainPublic domainfalsefalse
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country. Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Parasitism_of_pythium_debaryanum_hesse_on_the_potato_tuber_415.jpg
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Pythium debaryanum
potato
parasitism
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1 December 1919Gregorian
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