Metabolism of Plant Polysaccharides byLeucoagaricus gongylophorus, the Symbiotic Fungus of the Leaf-Cutting Ant Atta sexdens L
Metabolism of Plant Polysaccharides byLeucoagaricus gongylophorus, the Symbiotic Fungus of the Leaf-Cutting Ant Atta sexdens L
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切叶蚁 Atta sexdens L 的共生真菌 Leucoagaricus gogylophorus 的植物多糖代谢
DOI：
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发表时间：
1998
影响因子：
4.4
通讯作者：
M. Hebling
中科院分区：
文献类型：
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作者：
Celia Gomes de Siqueira;M. Bacci;F. C. Pagnocca;O. Bueno;M. Hebling
[摘要]六齿玉黍蚂蚁以巢内剪下的树叶上培养的真菌为食。真菌，Leucoagaricus gongylophorus，代谢植物多糖，如木聚糖，淀粉，果胶和纤维素，介导这些化合物的蚂蚁同化。这种代谢整合可能是蚂蚁-真菌共生的重要组成部分，它主要涉及木聚糖和淀粉，这两者都支持真菌的快速生长。纤维素对共生体营养似乎不太重要，因为它很难被真菌降解和同化。果胶被L. gongylophorus，并且其降解可能发生，使得真菌可以更容易地获得叶中的其他多糖。
ABSTRACT Atta sexdens L. ants feed on the fungus they cultivate on cut leaves inside their nests. The fungus, Leucoagaricus gongylophorus, metabolizes plant polysaccharides, such as xylan, starch, pectin, and cellulose, mediating assimilation of these compounds by the ants. This metabolic integration may be an important part of the ant-fungus symbiosis, and it involves primarily xylan and starch, both of which support rapid fungal growth. Cellulose seems to be less important for symbiont nutrition, since it is poorly degraded and assimilated by the fungus. Pectin is rapidly degraded but slowly assimilated by L. gongylophorus, and its degradation may occur so that the fungus can more easily access other polysaccharides in the leaves.