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Intraspecies variation of mature Pinus taeda in response to root‐infecting ophiostomatoid fungi
Author(s) -
Devkota P.,
Nadel R. L.,
Eckhardt L. G.
Publication year - 2018
Publication title -
forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 1437-4781
DOI - 10.1111/efp.12415
Subject(s) - biology , seedling , pinus <genus> , loblolly pine , botany , genetic variation , inoculation , horticulture , genetics , gene
Summary Seedling screening studies have shown intraspecies variation in susceptibility of Pinus taeda (loblolly pine) to Leptographium terebrantis and Grosmannia huntii , the causal agents of root infection in Pinus species. However, it is critical to understand the susceptibility of mature P. taeda trees. Roots of mature P. taeda families determined as susceptible and tolerant to L. terebrantis and G. huntii by previous seedling screening trials were artificially inoculated with the same fungal isolates. Dark necrotic lesion and vascular occlusion were recorded 8 weeks later. Families previously considered as susceptible had relatively longer lesions and occlusions. The variation in susceptibility to the two fungi remained the same as exhibited by families in the seedling trial. These results suggest intraspecies variation in relative susceptibility of P. taeda to L. terebrantis and G. huntii remains similar regardless of the age of the tree.