Abstract
Ozone is known to adversely affect plant growth. However, it is less clear how ozone affects belowground processes. This study tests the hypothesis that ozone alters growth and carbon allocation of vesicular arbuscular mycorrhizal (VAM) plants. Two ecotypes of Elymus glaucus (blue wild rye) were exposed to mycorrhizal inoculation and episodic ozone exposures simulating atmospheric conditions in the Los Angeles Basin. Preliminary results show that effects of ozone on growth were subtle. In both ecotypes, growth of aboveground biomass was not affected by ozone while root growth was decreased. In most treatments, mycorrhizal inoculation decreased growth of leaves and stems, but had no significant effect on root growth. Three-way ANOVA tests indicated interactive effects between ecotype, mycorrhiza and ozone. Further experimental work is needed to reveal the biological processes governing these responses.
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Claims 5
Claim · model-written summary
Ozone did not affect aboveground biomass growth in either ecotype.
- Taxon
- plantsViridiplantaet0
- Treatment
- ozonee0
- Outcome
- growth of aboveground biomasse0
- Direction
- not affectede0
Not reportedComparator
Verbatim
e0“In both ecotypes, growth of aboveground biomass was not affected by ozone”
t0“mycorrhizal plants”
Claim · model-written summary
Ozone decreased root growth in both ecotypes.
- Taxon
- plantsViridiplantaet0
- Treatment
- ozonee0
- Outcome
- root growthe0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“In both ecotypes, growth of aboveground biomass was not affected by ozone while root growth was decreased”
t0“mycorrhizal plants”
Claim · model-written summary
Mycorrhizal inoculation decreased leaf and stem growth in most treatments.
- Taxon
- plantsViridiplantaet0
- Treatment
- mycorrhizal inoculatione0
- Outcome
- growth of leaves and stemse0
- Direction
- decreasede0
Not reportedInteractorComparator
Verbatim
e0“In most treatments, mycorrhizal inoculation decreased growth of leaves and stems”
t0“mycorrhizal plants”
Claim · model-written summary
Mycorrhizal inoculation had no significant effect on root growth in most treatments.
- Taxon
- plantsViridiplantaet0
- Treatment
- mycorrhizal inoculatione0
- Outcome
- root growthe0
- Direction
- no significant effecte0
Not reportedComparator
Verbatim
e0“In most treatments, mycorrhizal inoculation decreased growth of leaves and stems, but had no significant effect on root growth”
t0“mycorrhizal plants”
Claim · model-written summary
Ecotype, mycorrhiza and ozone had interactive effects.
- Taxon
- plantsViridiplantaet0
- Material
- ecotypee0
- Treatment
- ozonee0
- Outcome
- interactive effectse0
Not reportedDirection
Verbatim
e0“Three-way ANOVA tests indicated interactive effects between ecotype, mycorrhiza and ozone”
t0“mycorrhizal plants”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.