File:Parasitism of pythium debaryanum hesse on the potato tuber 415.jpg

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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.
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https://archive.org/stream/journalofagricul18unit/journalofagricul18unit

Journal of agricultural research
Author 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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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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