...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological research >Fungal succession and decomposition of Camellia japonica leaf litter
【24h】

Fungal succession and decomposition of Camellia japonica leaf litter

机译：山茶叶片凋落物的真菌演替与分解

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Decomposition processes of Camellia japonica leaf litter were investigated over an 18-month period with reference to the role of fungal succession in the decomposition of lignin and holocellulose. Decomposition and fungal succession were studied in bleached and nonbleached portions of litter, which were precolonized by ligninolytic and cellulolytic fungi, respectively. Coccomyces nipponicum and Lophodermium sp. (Rhyt-ismataceae), which can attack lignin selectively, caused mass loss of lignin and were responsible for bleaching during the first 4 months (stage Ⅰ), whereas cellulolytic fungi caused mass loss of holocellulose in adjacent nonbleached portions. Soluble carbohydrates and polyphenols also decreased rapidly during this stage. Pestalotiopsis guepini, coelomycete sp.1, and the Ni-grospora state of Khuskia oryzae caused mass loss of holocellulose between 4 and 14 months (stage Ⅱ) and Xylaria sp. caused mass loss of both lignin and holocellulose from 14-18 months (stage Ⅲ). In stages Ⅱ and Ⅲ, decomposition was more rapid in bleached portions than in nonbleached portions probably due to the prior delignification of lignified holocellulose in bleached portions. Frequencies of these fungi showed different responses among species to the pattern of changes in lignin and holocellulose contents during decomposition. Total hyphal length increased in both portions over the study period, but mycelia of basidiomycetes accounted for about 2% of total hyphal length, suggesting that their role in fungal succession and decomposition was low. Lignin and nitrogen contents were consistently lower and holocellulose content was higher in bleached portions than in nonbleached portions during decomposition. The succession of ligninolytic and cellulolytic fungi was a major driving factor that promoted decomposition and precolonization by ligninolytic fungi enhanced decomposition.
机译：参照真菌继承在木质素和全纤维素分解中的作用，研究了茶花叶凋落物在18个月内的分解过程。研究了凋落物的漂白和非漂白部分的真菌分解和真菌演替，它们分别通过木质素分解和纤维素分解真菌预先定殖。 Nipponicum和Lophodermium sp。 （Rhyt-ismataceae）可以选择性地攻击木质素，导致木质素的质量损失，并在开始的四个月内导致了漂白（Ⅰ期），而纤维素分解真菌则导致相邻未漂白部分的全纤维素质量损失。在此阶段，可溶性碳水化合物和多酚也迅速减少。古斯氏菌，腔肠菌sp.1和米草的Ni-grospora状态在4至14个月（Ⅱ期）和Xylaria sp中引起全纤维素的质量损失。在14-18个月（Ⅲ期）引起木质素和全纤维素的质量损失。在阶段Ⅱ和Ⅲ中，漂白部分中的分解比未漂白部分中的分解更快，这可能是由于木质部分中木质纤维素的先去木质作用。这些真菌的频率在物种之间显示出对分解过程中木质素和全纤维素含量变化模式的不同响应。在研究期间，总菌丝长度在两个部分均增加，但担子菌的菌丝体约占菌丝总长度的2％，这表明它们在真菌演替和分解中的作用很低。在分解过程中，漂白部分的木质素和氮含量始终较低，而全纤维素含量则高于未漂白部分。木质素分解和纤维素分解真菌的继承是促进分解和木质素分解真菌促进分解的主要定植因子。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号