期刊
INTERNATIONAL JOURNAL OF MICROBIOLOGY
卷 2018, 期 -, 页码 -出版社
HINDAWI LTD
DOI: 10.1155/2018/4961726
关键词
-
类别
资金
- US Department of Energy (DOE) Office of Science (Office of Biological and Ecological Research (BER)) [DE-SC0004012]
- US Department of Energy (DOE) Office of Science (BER Grant) [DE-SC0012742]
- National Science Foundation Graduate Research Fellowship Programs [00039202]
- United States Agency for International Development Research and Innovations Fellowship through the US Global Development Lab [AID-LAB-T-15-00002]
- Graduate Research Opportunities Worldwide (GROW)
- U.S. Department of Energy (DOE) [DE-SC0012742, DE-SC0004012] Funding Source: U.S. Department of Energy (DOE)
Sweet sorghum is a promising crop for a warming, drying African climate, and basic information is lacking on conversion pathways for its lignocellulosic residues (bagasse). Brown rot wood-decomposer fungi use carbohydrate-selective pathways that, when assessed on sorghum, a grass substrate, can yield information relevant to both plant biomass conversion and fungal biology. In testing sorghum decomposition by brown rot fungi (Gloeophyllum trabeum, Serpula lacrymans), we found that G. trabeum readily degraded sorghum, removing xylan prior to removing glucan. Serpula lacrymans, conversely, caused little decomposition. Ergosterol (fungal biomarker) and protein levels were similar for both fungi, but S. lacrymans produced nearly 4x lower polysaccharide-degrading enzyme specific activity on sorghum than G. trabeum, perhaps a symptom of starvation. Linking this information to genome comparisons including other brown rot fungi known to have a similar issue regarding decomposing grasses (Postia placenta, Fomitopsis pinicola) suggested that a lack of CE 1 feruloyl esterases as well as low xylanase activity in S. lacrymans (3x lower than in G. trabeum) may hinder S. lacrymans, P. placenta, and F. pinicola when degrading grass substrates. These results indicate variability in brown rot mechanisms, which may stem from a differing ability to degrade certain lignin-carbohydrate complexes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据