Abstract
Various studies have shown that water-stressed plants are more tolerant of ozone exposures than are unstressed plants. Two probable explanations for this tolerance are (a) stomatal closure which reduces ozone uptake and (b) biochemical or anatomical changes within the leaves. Phaseolus vulgaris cv Pinto bean plants were established and transferred to membrane systems which controlled the osmotic potential around the roots at -35 or -80 kilopascals for 5 days prior to ozone treatment (0 or 1.0 microliters per liter for 2 hours). Both water-stressed and unstressed plants were sprayed with various concentrations of abscisic acid to close the stomata or with fusicoccin to induce stomata opening. The abaxial stomatal resistances of primary and trifoliate leaves were measured just prior to ozone exposure. Plant response to ozone was determined by stress ethylene production and chlorophyll loss. Both water stress and abscisic acid induced stomatal closure and reduced ozone injury. In water-stressed plants, fusicoccin induced stomatal opening and those plants were as sensitive to ozone as were the non-water-stressed plants. These data suggest that water stress protects plants from ozone injury mainly through its influence on stomatal aperture rather than through biochemical or anatomical changes.
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Claims 7
Claim · model-written summary
Water stress induced stomatal closure in Pinto bean.
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarise1 - Material
- Pinto beane1
- Treatment
- water stresse0
- Outcome
- stomatal closuree0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both water stress and abscisic acid induced stomatal closure and reduced ozone injury”
e1“Phaseolus vulgaris cv Pinto bean plants”
Claim · model-written summary
Abscisic acid induced stomatal closure in Pinto bean.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Material
- Pinto beane1
- Treatment
- abscisic acide0
- Outcome
- stomatal closuree0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both water stress and abscisic acid induced stomatal closure and reduced ozone injury”
e1“Phaseolus vulgaris cv Pinto bean plants”
Claim · model-written summary
Water stress reduced ozone injury in Pinto bean.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- water stresse0
- Outcome
- ozone injurye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both water stress and abscisic acid induced stomatal closure and reduced ozone injury”
e1“Phaseolus vulgaris cv Pinto bean plants”
Claim · model-written summary
Abscisic acid reduced ozone injury in Pinto bean.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- abscisic acide0
- Outcome
- ozone injurye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both water stress and abscisic acid induced stomatal closure and reduced ozone injury”
e1“Phaseolus vulgaris cv Pinto bean plants”
Claim · model-written summary
Fusicoccin reopened stomata in water-stressed Pinto bean.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- fusicoccine0
- Outcome
- stomatal openinge0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In water-stressed plants, fusicoccin induced stomatal opening”
e1“Phaseolus vulgaris cv Pinto bean plants”
Claim · model-written summary
With fusicoccin, water-stressed plants were as sensitive to ozone as non-water-stressed plants.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise2
- Treatment
- fusicoccine1
- Outcome
- sensitive to ozonee0
- Direction
- as sensitivee0
- Comparator
- non-water-stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those plants were as sensitive to ozone as were the non-water-stressed plants”
e1“In water-stressed plants, fusicoccin induced stomatal opening”
e2“Phaseolus vulgaris cv Pinto bean plants”
Claim · model-written summary
The authors attributed water-stress protection from ozone injury mainly to stomatal aperture.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- water stresse0
- Outcome
- protects plants from ozone injurye0
- Qualifier
- stomatal aperturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress protects plants from ozone injury mainly through its influence on stomatal aperture”
e1“Phaseolus vulgaris cv Pinto bean plants”
The same questions in other papers
drought · physiology: gas exchange · Phaseolus vulgaris (common bean)Positive and negative results
1 paper in the same direction as this paper · 13 in the opposite direction
- no effect
- negative
- negative
11 papers more in this group
See all 15 papers →drought · crop injury · Phaseolus vulgaris (common bean)Results agree
1 paper in the same direction as this paper
- positive
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.