Histochemistry of Corsican Pine Needles Infected by Lophodermella sulcigena (Rostr.) v.Höhn

A histochemical survey was made on lesion development in Pinus nigra (Aiton) Melville infected by Lophodermella sulcigena (Rostr.) v. Höhn. The fungus colonized the intercellular spaces of the mesophyll and then invaded the endodermis, hypodermis and epidermis. All tissues within the lesion were kil...

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Bibliographic Details
Published in:Annals of botany 1976-03, Vol.40 (2), p.281-288
Main Authors: WILLIAMSON, B., MITCHELL, C. P., MILLAR, C. S.
Format: Article
Language:English
Subjects:
Blood transfusion
Cytoplasm
Epithelial cells
Hyphae
Mesophyll
Mesophyll cells
Parenchyma
Pine trees
Starches
Tannins
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Summary:A histochemical survey was made on lesion development in Pinus nigra (Aiton) Melville infected by Lophodermella sulcigena (Rostr.) v. Höhn. The fungus colonized the intercellular spaces of the mesophyll and then invaded the endodermis, hypodermis and epidermis. All tissues within the lesion were killed. Lesion expansion ceased in autumn when a stationary interface was established between infected mesophyll and healthy host cells at the needle base. The stationary interface was marked by a zone of fungalfree, dead mesophyll cells and the appearance of an intercellular matrix. Extensive hypertrophy and hyperplasia occurred in parenchyma tissues at the interface. Protein, starch and DNA persisted in tanned cytoplasm for many months.
ISSN:0305-7364
1095-8290
DOI:10.1093/oxfordjournals.aob.a085129