Fungal decomposition of woody debris of Castanopsis sieboldii in a subtropical old-growth forest
Fungal decomposition of woody debris of Castanopsis sieboldii in a subtropical old-growth forest
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DOI：
10.1007/s11284-011-0890-8
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发表时间：
2011
影响因子：
2
通讯作者：
Y. Fukasawa;T. Osono;H. Takeda
中科院分区：
文献类型：
--
作者：
Y. Fukasawa;T. Osono;H. Takeda
真菌，特别是担子菌，是陆地森林生态系统中木质残体分解的主要媒介。然而，有关木材栖息真菌的丰度和腐烂活性的定量数据缺乏，特别是在热带和亚热带地区。研究了亚热带天然林中锥木残体中木栖真菌的腐柱动态及其腐木活性。在6种担子菌和2种子囊菌中，以孢子果形式存在于黑果金菇（C.结果表明，在同一种植物中，无论从孢子果的出现频率还是腐烂柱的面积百分比来看，都以密缘微孔菌（Microporus affinis）最为丰富，尤其是在腐烂的早期阶段。在M. affinis的酸不水解残渣（AUR）和综纤维素同时腐烂，木材相对密度下降到新鲜C的45.8%。西博尔迪伍德。在实验室条件下进行的纯培养衰变试验表明，M. affinis是AUR和综纤维素的强分解剂。这些结果表明M. affinishas的木质纤维素分解的C.在腐烂的早期阶段。
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 wood-inhabiting 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 ofCastanopsis sieboldiiand the wood decay activities of those fungi in a subtropical natural forest. Among six basidiomycetes and two ascomycetes observed as sporocarps on fallen boles ofC. sieboldii,Microporus affiniswas 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 ofM. affinis, both acid-unhydrolyzable residue (AUR) and holocellulose decayed simultaneously, and wood relative density decreased to 45.8% of that of freshC. sieboldiiwood. A pure culture decay test under laboratory conditions showed thatM. affiniswas a strong decomposer of AUR and holocellulose. These results suggest thatM. affinishas a central role in lignocellulose decomposition of wood ofC. sieboldiiin the early stages of decomposition.