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散斑壳菌对华山松凋落针叶的室内分解(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2014年03期
Page:
77-82
Column:
研究论文
publishdate:
2014-05-15

Article Info:/Info

Title:
Laboratory decomposition research of Lophodermium on the litter needles from Pinus armandii
Article ID:
1000-2006(2014)03-0077-06
Author(s):
YANG ChunlinXU XiulanTIAN ShaWEN ZilanLIU Yinggao*JIANG XinhuaZHANG YanLIU Huitao
College of Forestry, Sichuan Agricultural University, Ya’an 625014, China
Keywords:
Lophodermium spp. Pinus armandii litter needles cellulase microorganism decomposition
Classification number :
S154
DOI:
10.3969/j.issn.1000-2006.2014.03.015
Document Code:
A
Abstract:
In order to study the saprophytic ability of Lophodermium spp. and mechanism of each cellulase produced in the process of decomposing litters, newly litter needles from Pinus armandii were used as the decomposition material to conduct a decomposition experiment in pure culture. Five species of Lophodermium(L. conigenum, L. pinastri, L. kumaunicum, L. sichuanense, L. erlangshanense)were cultivated, in which the needles were used as the sole carbon source. The weight loss rate of the needles and the cellulase enzyme activities(Filter paper activity(FPA), Endoglucanase(EG), Cellobiohydrolase(CBH), β-glucosidase(BGL))were determined in the test. The correlation analysis showed that there was a certain synergistic effect among EG, CBH and BGL(except L. pinastri and L. erlangshanense), especially among CBH and EG. Cellulose decomposition was restricted by each enzyme activity, the litter needles could be decomposed faster with higher synergistic effect and high enzyme activity. The mass loss rates caused by five Lophodermium spp. was between 8.5%-11.8%, and which declined in the following order: L. pinastri>L. sichuanense>L. kumaunicum>L. conigenum>L. erlangshanense. The five kinds of Lophodermium spp. can produce cellulase, and they have different levels of synergistic effect among EG, CBH and BGL. They all had certain ability to decompose the needles, and they are facultative parasites, but they have weak saprophytism.

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Last Update: 2014-05-15