Abstract
Increasing rain acidity consistently reduced the number of mycorrhizal short roots. In general, infection decreased linearly versus rain pH. Plants exposed to simulated rain at pH 3.0 had c20% fewer mycorrhizal roots than plants exposed to pH 5.6 rain. The decrease in the number of mycorrhizal roots was a result of decreases both in the number of short roots available for infection and in the percentage of roots infected. Ozone had no effect on mycorrhizal infection if applied 3 alternate days/week at concentrations ranging from 0.02-0.14 ppm, but there were significant changes in infection in plants exposed to ozone for 5 days/wk. There was no evidence for an interaction between the 2 pollutants. Percent mycorrhizal infection was highly correlated with seedling N concentration across all soil types and rain treatments. -from Authors
Original language | English (US) |
---|---|
Pages (from-to) | 1510-1516 |
Number of pages | 7 |
Journal | Canadian Journal of Botany |
Volume | 66 |
Issue number | 8 |
DOIs | |
State | Published - 1988 |