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Chitinolytic activities of Eucalyptus pilularis and Pinus sylvestris root systems challenged with mycorrhizal and pathogenic fungi
Author(s) -
HODGE A.,
ALEXANDER I. J.,
GOODAY G. W.
Publication year - 1995
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1995.tb05727.x
Subject(s) - phytophthora cinnamomi , pisolithus , botany , biology , heterobasidion annosum , hypha , mycorrhiza , pinus <genus> , eucalyptus globulus , eucalyptus , picea abies , symbiosis , phytophthora , genetics , bacteria
SUMMARY The chitinolytic activities of Pinus sylvestris L. and Eucalyptus pilularis Sm. roots were measured after an exposure for 24 h to either ectomycorrhizal ( Pisolithus tinctorius (Pers.) Coker and Couch) or root‐infecting pathogenic fungi ( Heterobasidion annosum (Fr.) Karst. and Phytophthora cinnamomi Rands.). P. sylvestris roots not exposed to fungal hyphae had low levels of β‐ N ‐acetylglucosaminidase. This activity greatly increased after exposure to H. annosum but not P. cinnamomi or P. tinctorius. β‐ N ‐Acetylglucosaminidase activity in E. pilularis roots was unchanged after exposure to P. cinnamomi or P. tinctorius. Exo‐ and endochitinase activity increased after P. sylvestris roots were challenged with H. annosum , but not by the other fungi. These results suggest that β‐ N ‐acetylglucosaminidase might be an important early response to chitinous pathogens.