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ベッコウタケ接種に対する生立木樹幹二次木部の反応

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Title: ベッコウタケ接種に対する生立木樹幹二次木部の反応
Other Titles: Changes in the Secondary Xylem of the Living Stem of Four Tree Species in Response to Inoculation with Perenniporia fraxinea
Authors: 上田, 幹朗1 Browse this author
堀, 千明2 Browse this author
玉井, 裕3 Browse this author →KAKEN DB
山岸, 祐介4 Browse this author
宮本, 敏澄5 Browse this author →KAKEN DB
佐野, 雄三6 Browse this author →KAKEN DB
Authors(alt): Ueta, Mikio1
Hori, Chiaki2
Tamai, Yutaka3
Yamagishi, Yusuke4
Miyamoto, Toshizumi5
Sano, Yuzou6
Keywords: susceptibility to infection
white-rot
Perenniporia fraxinea
inoculation test
xylem
Issue Date: Jan-2018
Publisher: 日本木材学会 The Japan Wood Research Society
Journal Title: Mokuzai gakkai shi : 木材学会誌
Volume: 64
Issue: 1
Start Page: 1
End Page: 9
Publisher DOI: 10.2488/jwrs.64.1
Abstract: This study aimed to clarify the factors that influence tree susceptibility to infection by the white-rot fungus Perenniporia fraxinea, by inoculating it into stems of four tree species at butt and breast height, and comparing the alterations in the xylem three to five months after inoculation. The four tree species include Robinia pseudoacacia, Cerasus sargentii, Ulmus davidiana var. japonica and Picea glehnii; the former two species are easily infected by this fungus, whereas the latter two species are not. Polymerase chain reaction (PCR) analysis detected the inoculated fungus only in the butt xylem of R. pseudoacacia and C. sargentii and the cell walls in the butt xylem tissues of these species were eroded by hyphae. Other xylem alterations (e.g., water accumulation and cell occlusion) differed among tree species, whereas no apparent difference was observed between butt and breast height. For example, water accumulation occurred in the discolored wood tissues around the inoculated holes in both R. pseudoacacia and U davidiana var. japonica, while dehydration occurred in the light-colored wood tissues around the inoculated hole in P. glehnii. In the vicinity of the inoculation holes, resin deposits formed in P. glehnii, whereas cell occlusions by tyloses/gums occurred in the other three species. These results suggest that susceptibility to P. fraxinea infection differs not only among tree species but also between heights above ground. It is likely that no particular response to fungal inoculation in the xylem tissues of these four tree species is closely associated with their susceptibility to the infection by P. fraxinea.
ベッコウタケ(以下同菌)に感染する頻度が高いと報告されているハリエンジュ,エゾヤマザクラ,同じく低いとされるハルニレ,アカエゾマツの各立木樹幹の地際部と胸高部に同菌を接種し,菌糸の蔓延状況や材組織で生じる反応を比較した。接種孔付近の材組織には,ハリエンジュ,ハルニレでは濃い変色と水分の集積,アカエゾマツでは淡色化と脱水など,樹種毎に特徴的な変化が生じたが,地上高による違いは見られなかった。接種した菌はハリエンジュ,エゾヤマザクラの地際部からのみ検出された。菌糸による細胞壁の分解も両種の地際接種部の変色材では認められた。接種孔近傍の材組織において,アカエゾマツでは樹脂の堆積,他の広葉樹3種では細胞閉塞物の堆積が観察された。以上から,同菌に対する抵抗性は樹種間,地上高間で異なると言える。また,同菌に対する抵抗性と水分集積などの材組織で生じる反応との間に明確な関連性はないと考えられる。
Rights: © 2018 一般社団法人 日本木材学会
© 2018 The Japan Wood Research Society
Type: article
URI: http://hdl.handle.net/2115/72353
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐野 雄三

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