Abstract
Gremmeniella abietina infects shoots of pines through stomata numbering about 3–20 in each of two short irregular rows on the abaxial surface of bracts that subtend short shoots. The germ tube penetrates between guard cells, sparsely colonizes bract tissue, and reaches the periderm that separates bract from stem tissue by late summer or fall. The fungus crosses this periderm only after about early February and then rapidly colonizes the short shoot and surrounding cortical tissue. This invasion produces a resinous brown necrotic area of cortical parenchyma and phloem beneath the bract as the first visible symptom of infection.
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© 1984 Martinus Nijhoff/Dr W. Junk Publishers, The Hague
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Patton, R.F., Spear, R.N., Blenis, P.V. (1984). The Infection Process in Pines By Gremmeniella abietina . In: Manion, P.D. (eds) Scleroderris canker of conifers. Forestry Sciences, vol 13. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-6107-4_18
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DOI: https://doi.org/10.1007/978-94-009-6107-4_18
Publisher Name: Springer, Dordrecht
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