Influence of ozone and HCl gas on citrus and the vesicular-arbuscular mycorrhizal fungus Glomus fasciculatus
One half of Troyer citrange (Poncirus trifoliata x Citrus sinensis) seedlings were grown from seed and inoculated during transplanting with Glomus fasciculatus. Inoculum consisted of soil and roots from sudangrass (Sorghum vulgare) containing hyphae, vesicles, arbuscles, and chlamydospores of G. fasciculatus. At 5, 12, and 16 weeks after inoculation, both inoculated and noninoculated seedlings were exposed to 110-140 mg/m/sup 3/ (73-92 ppm) HCl gas for 20 minutes or to 2 mg/m/sup 3/ (1 ppm) ozone for 4 hours. HCl produced moderate marginal leaf necrosis while ozone produced no visible symptoms. Control and HCl-exposed mycorrhizal seedlings were 28% and 36% taller, respectively, than corresponding nonmycorrhizal seedlings. Exposure to HCl reduced mycorrhizal seedling height by 24% compared to mycorrhizal controls. Ozone exposed mycorrhizal citrus were not significantly taller than non-mycorrhizal citrus but were 37% shorter than mycorrhizal controls. Total biomass of control and HCl-exposed mycorrhizal seedlings were greater than their nonmycorrhizal counterparts but the biomass was not significantly different between ozone-exposed seedlings. Spore production by G. fasciculatus was reduced 50% in ozone-exposed seedlings while spore populations of HCl-exposed seedlings were not statistically different from the controls.
- Research Organization:
- Univ. of California, Riverside
- OSTI ID:
- 5196367
- Journal Information:
- Proc. Amer. Phytopathol. Soc.; (United States), Journal Name: Proc. Amer. Phytopathol. Soc.; (United States) Vol. 4; ISSN PAPSD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
CALIFORNIA
CITRUS
DATA
EXPERIMENTAL DATA
FEDERAL REGION IX
FUNGI
GASEOUS WASTES
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
MYCORRHIZAS
NORTH AMERICA
NUMERICAL DATA
OZONE
PLANTS
PRODUCTIVITY
SEEDLINGS
USA
WASTES