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Fungal decomposition of woody debris of Castanopsis sieboldii in a subtropical old-growth forest

机译：亚热带老龄林中of锥虫木屑的真菌分解

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摘要

Fungi, especially basidiomycetes, are the primary agents of woody debris decomposition in terrestrial forest ecosystems. However, quantitative data regarding the abundance and decay activity of woodinhabiting fungi are lacking, especially for tropical and subtropical areas. This study demonstrates the dynamics of decay columns of wood-inhabiting fungi within decaying woody debris of Castanopsis sieboldii and the wood decay activities of those fungi in a subtropical natural forest. Among six basidiomycetes and two ascomycetes observed as sporocarps on fallen boles of C. sieboldii, Microporus affinis was most abundantly observed in terms of frequency of sporocarps and as percentage area of decay columns within cross-sections of boles, especially those in the early stages of decomposition. In decay columns of M. affinis, both acidunhydrolyzable residue (AUR) and holocellulose decayed simultaneously, and wood relative density decreased to 45.8% of that of fresh C. sieboldii wood. A pure culture decay test under laboratory conditions showed that M. affinis was a strong decomposer of AUR and holocellulose. These results suggest that M. affinis has a central role in lignocellulose decomposition of wood of C. sieboldii in the early stages of decomposition.
机译：真菌，尤其是担子菌，是陆地森林生态系统中木屑分解的主要媒介。但是，缺乏关于木栖真菌的丰度和衰减活性的定量数据，特别是对于热带和亚热带地区。这项研究证明了亚热带天然林中Cast木腐烂木质碎片中居住木材真菌的腐烂柱的动态以及这些真菌的木材腐烂活动。在西伯利亚梭菌下降的卵中观察到的6个担子菌和2个子囊菌为孢子果皮中，在孢子果皮的频率和腐烂柱的横截面积百分比方面，特别是在早期的那些中，观察到的微孢子菌亲和力最高。分解。在A. affinis的腐烂柱中，酸不可水解残基（AUR）和全纤维素同时腐烂，木材的相对密度降至新鲜西伯利亚梭菌的45.8％。在实验室条件下进行的纯培养物腐烂试验表明，嗜血支原体是AUR和全纤维素的强分解剂。这些结果表明，在分解的早期阶段，A。affinis在木质纤维素的分解过程中起着核心作用。

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  • 来源
    《Ecological research》 |2012年第1期|p.211-218|共8页
  • 作者

    Yu Fukasawa; Takashi Osono; Hiroshi Takeda;

  • 作者单位

    Laboratory of Forest Ecology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan,Laboratory of Forest Ecology, Graduate School of Agricultural Science, Tohoku University, Naruko-onsen, Osaki, Miyagi 989-6711, Japan;

    Laboratory of Forest Ecology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan;

    Laboratory of Forest Ecology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    acid-unhydrolyzable residue (AUR); dead wood; decay; fungal community; holocellulose;

    机译：酸不可水解残基（AUR）;枯木衰变;真菌群落;全纤维素;

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