Pythium debaryanum

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Pythium debaryanum
Photographs enlarged from portions of a motion photomicrograph, showing the method of cell wall penetration by Pythium hyphae. A. — Shows hypha growing toward the potato cell wall. B. — Shows hypha attached to wall and about to penetrate. C. — The tip has just broken through the wall. D. — The penetration is complete. Note the black line at the point where the hypha penetrates the wall. This may be due to a rolling up of the potato cell wall about the hypha or to a difference in refraction caused by compression of the wall.
Photographs enlarged from portions of a motion photomicrograph, showing the method of cell wall penetration by Pythium hyphae.

A. — Shows hypha growing toward the potato cell wall.
B. — Shows hypha attached to wall and about to penetrate.
C. — The tip has just broken through the wall.
D. — The penetration is complete. Note the black line at the point where the hypha penetrates the wall. This may be due to a rolling up of the potato cell wall about the hypha or to a difference in refraction caused by compression of the wall.

Scientific classification edit
Phylum: Heterokontophyta
Class: Oomycota
Order: Peronosporales
Family: Pythiaceae
Genus: Pythium
Species: P. debaryanum
Binomial name
Pythium debaryanum
R. Hesse (1874)
Synonyms

Eupythium debaryanum (R. Hesse) Nieuwl., (1916)

Pythium debaryanum is a species of water mould in the family Pythiaceae. It is known as a plant pathogen on many kinds of wild and cultivated plants, including peanut, beet, eucalyptus, tobacco, and pine trees. The plants develop damping off, a disease state.[1]

See also[edit]

References[edit]

  1. ^ Pythium debaryanum. Plantwise.

External links[edit]

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.