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タイトル: | Bleaching of leaf litter and associated microfungi in subboreal and subalpine forests. |
著者: | Hagiwara, Yusuke Matsuoka, Shunsuke https://orcid.org/0000-0002-3723-8800 (unconfirmed) Hobara, Satoru Mori, Akira S Hirose, Dai Osono, Takashi |
著者名の別形: | 大園, 享司 |
キーワード: | decomposition elevational gradient fungal diversity leaves lignin ligninolytic fungi |
発行日: | Oct-2015 |
出版者: | NRC Research Press |
誌名: | Canadian journal of microbiology |
巻: | 61 |
号: | 10 |
開始ページ: | 735 |
終了ページ: | 743 |
抄録: | Fungal decomposition of lignin leads to the whitening, or bleaching, of leaf litter, especially in temperate and tropical forests, but less is known about such bleaching in forests of cooler regions, such as boreal and subalpine forests. The purposes of the present study were to examine the extent of bleached area on the surface of leaf litter and its variation with environmental conditions in subboreal and subalpine forests in Japan and to examine the microfungi associated with the bleaching of leaf litter by isolating fungi from the bleached portions of the litter. Bleached area accounted for 21.7%-32.7% and 2.0%-10.0% of total leaf area of Quercus crispula and Betula ermanii, respectively, in subboreal forests, and for 6.3% and 18.6% of total leaf area of B. ermanii and Picea jezoensis var. hondoensis, respectively, in a subalpine forest. In subboreal forests, elevation, C/N ratio and pH of the FH layer, and slope aspect were selected as predictor variables for the bleached leaf area. Leaf mass per area and lignin content were consistently lower in the bleached area than in the nonbleached area of the same leaves, indicating that the selective decomposition of acid unhydrolyzable residue (recalcitrant compounds such as lignin, tannins, and cutins) enhanced the mass loss of leaf tissues in the bleached portions. Isolates of a total of 11 fungal species (6 species of Ascomycota and 5 of Basidiomycota) exhibited leaf-litter-bleaching activity under pure culture conditions. Two fungal species (Coccomyces sp. and Mycena sp.) occurred in both subboreal and subalpine forests, which were separated from each other by approximately 1100 km. |
著作権等: | This is the accepted manuscript (post-print) of an article is available at http://dx.doi.org/10.1139/cjm-2015-0111. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/202572 |
DOI(出版社版): | 10.1139/cjm-2015-0111 |
PubMed ID: | 26186502 |
出現コレクション: | 学術雑誌掲載論文等 |
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