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Spatial distribution of

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Summary

To compare the distributions of Raffaelea quercivora hyphae within seedlings of a susceptible species, Quercus crispula, and a resistant species, Q. glauca, we examined water conductance at transverse sections. Raffaelea quercivora was inoculated into the stems of seedlings in July (summer) and October (autumn) and observed by light and fluorescence microscopy at 1 and 2 weeks after inoculation. The hyphal distribution patterns expressed as the I δ index differed between the species at each occasion. The hyphal growth was wider in Q. crispula than in Q. glauca in July inoculation, but did not differ in October inoculation. Non‐conductive sapwood in Q. crispula in transverse section was wider than that in Q. glauca at each occasion. The differences of hyphal growth and hyphal distribution patterns between species as little as 1 week after inoculation reflect differences in host susceptibility to the fungus.
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Document Type: Research Article

Affiliations: 1: Laboratory of Forest Pathology and Mycology, Graduate School of Bioresources, Mie University, Tsu, Mie 514-8507, Japan 2: Asian Natural Environmental Science Center, The University of Tokyo, 1-1-8, Nishitokyo, Tokyo 188-0002, Japan

Publication date: 2011-08-01

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