Performance of two Ips bark beetles and their associated pathogenic fungi on hosts reflects a species-specific association in the beetle-fungus complex

• DOI: 10.3389/fpls.2022.1029526
• Publication Date: 2022-11-22T06:03:29Z
• Authors: Xia Shi; Jiaxing Fang; Huicong Du; Sufang Zhang; Fu Liu; Zhen Zhang; Xiangbo Kong
• Keywords: 0301 basic medicine; 03 medical and health sciences; signal interaction; Ips bark beetle; beetle/fungus complex; host suitability; associated fungi; Plant culture; Plant Science; 15. Life on land; SB1-1110

When Ips bark beetles invade and colonize the host plants, their associated pathogenic fungal partners are carried into phloem of trees. Host trees lethally attacked by beetle-fungus complex collective damage severely limits forestry production worldwide. It is great importance to verify whether fungi show concordant performance in terms biology, physiology, biochemistry on In this study, two typographus subelongatus (Coleoptera: Curculionidae, Scolytinae), respective Endoconidiophora polonica fujiensis, plants Picea jezoensis Larix olgensis were selected as test material. Cross-inoculation experiments conducted indoors outdoors investigate differences reproduction development infectivity well physiological responses infections. The results showed that I. E. had excellent P. jezoensis; however, neither successfully colonized infected L. olgensis. contrast, fujiensis strong suitability some degree jezoensis, although for was significantly higher than fujiensis. addition, we found absolute amount ergosterol accumulated lesion positively correlated with area. area both strongly release monoterpenes, but no obvious correlation concentration fungi-induced phenols side-chain oxidation lignin xylem sites. Based these results, confirmed "I. typographus-E. polonica" subelongatus-E. fujiensis" complexes most suitable consistent performances own traditional hosts, establishing a stable species-specific association relationship complexes, showing broader suitability. From perspective infections, monoterpenes an important indicator