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Histopathology of longleaf pine needles infected by Ploioderma hedgcockii (Dearn.) Darker
Author(s) -
Jewell F. F.
Publication year - 1990
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1990.tb01270.x
Subject(s) - endodermis , biology , hypha , histopathology , lesion , botany , ultrastructure , anatomy , pathology , medicine
The histopathology of Ploioderma hedgcockii on longleaf pine needles was examined. Abnormal host tissue was confined to the visible lesion and to tissues external to the endodermis where collapse of mesophyll cells was the predominant abnormality. Resin ducts exhibited necrosis and dissolution of epithelial cells. l Hyphae, intra‐ and intercellular, were frequent to profuse in inter‐cellular spaces resulting from mesophyll cell collapse. Hyphae were external to the endodermis and appeared limited to the symptomatic tissue by an intercellular matrix at the lesion bound‐aries Hysterotheca were subepidermal and appeared seated on the hypodermis. Asci appeared contain foui “two‐stage” ascospores. The presence of a toxin was not indicated in the host/pathogen relationship.