Effects of ozone and simulated acid rain on mycorrhizal infection in two families of Pinus taeda L

Conference · Wed Jul 01 04:00:00 EDT 1987 · Bull. Ecol. Soc. Am.; (United States)

OSTI ID:6025011

O'Neill, E G; McLaughlin, S B

Twelve-week-old Pinus taeda seedlings from two families, mycorrhizal with Pisolithus tinctorius, were exposed to factorial combinations of simulated acid rain (pH = 3.5, 4.3, 5.0) and O/sub 3/ (charcoal-filtered air, ambient air plus 80 nL L/sup -1/ or 160 nL L/sup -1/ O/sub 3/) in open-top chambers from August to November 1986. Mycorrhizal infection was assessed before initiation of treatments and after 6 or 12 weeks of exposure by a visual estimate of the percent of short roots infected. The two families differed significantly (Pless than or equal to0.05) in percent infection at all harvests; however, no interactions between family and O/sub 3/ occurred. No effects of rain pH were found. Mycorrhizal infection was significantly decreased in both O/sub 3/ treatments at the 12-week harvest. Changes in mycorrhizal infection through time are discussed relative to patterns of seedling root growth.

• Research Organization: Environmental Sciences Div., Oak Ridge National Lab., Oak Ridge, TN (US)
• OSTI ID: 6025011
• Report Number(s): CONF-870835-
• Conference Information: Journal Name: Bull. Ecol. Soc. Am.; (United States) Journal Volume: 68:3
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
140504 -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
510100 -- Environment
Terrestrial-- Basic Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
553000* -- Agriculture & Food Technology
60 APPLIED LIFE SCIENCES
ACID RAIN
ATMOSPHERIC PRECIPITATIONS
BIOLOGICAL AVAILABILITY
BIOLOGICAL EFFECTS
DISEASES
ENVIRONMENTAL EXPOSURE PATHWAY
GROWTH
MYCORRHIZAS
OZONE
PLANT GROWTH
PLANTS
RAIN
ROOTS
SEEDLINGS
SIMULATION