Acquisition of Digestive Enzymes by Siricid Woodwasps from Their Fungal Symbiont

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Abstract
Larvae of the woodwasp. Sirex cyaneus , contain midgut digestive enzymes that enable them to utilize the major fungal and plant polysaccharides found in their food. At least two classes of enzymes, the C x -cellulases and the xylanases, are not produced by the larvae. Instead, larvae acquire these enzymes while ingesting tissue of Amylostereum chailletii , the fungal symbiont that occurs in the wood on which the larvae feed.
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