Endophytic and epiphytic phyllosphere fungi of red-osier dogwood (<Emphasis Type="Italic">Cornus stolonifera</Emphasis>) in British Columbia |
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Authors: | Takashi Osono |
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Institution: | (1) Pacific Forestry Centre, Canadian Forest Service, Natural Resources Canada, Victoria, Canada;(2) Present address: Laboratory of Forest Ecology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan |
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Abstract: | Endophytic and epiphytic phyllosphere fungi associated with red-osier dogwood (Cornus stolonifera), a deciduous shrub, were examined in coastal British Columbia, Canada. Current-year shoots were divided into four types
based on the absence or presence of inflorescence and secondary elongated shoots at the apex of primary shoots. Leaves on
these shoots were then classified into six categories so as to examine the effect of flowering, secondary shoot elongation,
and shoot order within current-year shoots on the occurrence of phyllosphere fungi. Species composition of fungi was markedly
different between the interior and surface of leaves, whereas it was relatively similar among the six leaf categories in the
interior or on the surface. Frequencies of the eight major species were not different between leaves on flowering and nonflowering
shoots. The frequency of Colletotrichum gloeosporioides in the leaf interior was greater on leaves on the primary shoots that elongated the secondary shoots than on those that did
not, and was greater on leaves on the primary shoots than on those on the secondary shoots. On the other hand, secondary shoot
elongation and shoot order had no effect on the frequencies of C. gloeosporioides and the other seven epiphytes on leaf surfaces. |
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Keywords: | Current-year shoot Dogwood Endophyte Epiphyte Flower |
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