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Ectomycorrhizal protection of Pinus sylvestris against copper toxicity
Author(s) -
Van Tichelen Katia K.,
Colpaert Jan V.,
Vangronsveld Jaco
Publication year - 2001
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 - 10.1046/j.1469-8137.2001.00081.x
Subject(s) - mycelium , paxillus involutus , botany , biology , shoot , copper toxicity , toxicity , pinus <genus> , metal toxicity , mycorrhiza , chemistry , symbiosis , genetics , organic chemistry , bacteria
Summary• Change in the copper (Cu) sensitivity of Pinus sylvestrisis presented, in response to the ectomycorrhizal fungi,Suillus bovinusandThelephora terrestris , common mycobionts on metal contaminated sites. • Seedlings grown under phosphorus (P) limitation were exposed to a range of Cu concentrations. Plant and fungal development, P nutrition, sorption of Cu on roots and external mycelia as well as transfer of Cu to shoots were assessed. • Root growth and P nutrition were severely inhibited in nonmycorrhizal pines at elevated Cu compared with mycorrhizal plants. Excess Cu had little effect on the development of mycorrhizal roots and mycelia. Thelephora terrestriswas less sensitive to Cu stress thanS. bovinus. The extraradical mycelium ofS. bovinusretained large amounts of Cu. However, binding of Cu in fungal tissue was not a prerequisite for low Cu sensitivity sinceT. terrestrisabsorbed considerably less Cu thatS. bovinus . • Both ectomycorrhizal fungi protect P. sylvestris against Cu toxicity; a benefit that was not due to a metal dilution effect. The mechanisms of mycorrhizal amelioration of Cu toxicity are probably diverse and species‐dependent.