Abstract
The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families. Exposures were conducted in an open, whole-plant exposure system providing controlled levels of irradiance, air temperature, C02, relative humidity, and ethylene concentration. Net photosynthesis and stomatal conductance to water vapor in units of moles per square meter per second were measured on recently expanded leaves in control and ethylene-treated plants using a remotely operated single-leaf cuvette. The ethylene concentration was either 0 or 210 micromoles per cubic meter and was maintained for 4 hours. Species varied substantially in the response of their foliar gas exchange to ethylene. In 7 of the 13 species, net photosynthesis was inhibited statistically by 4 hours of ethylene exposure. As a function of the rate in control plants, the responses were most pronounced and statistically significant in Arachis hypogaea (-51.1%), Gossypium hirsutum (-31.7%), Glycine max (-24.8%), Cucurbita pepo (-20.4%), Phaseolus vulgaris (-18.4%), Setaria viridis (-17.5%), and Raphanus sativus (-4.4%). Whereas the responsiveness of net photosynthesis to ethylene among the 13 species showed no specific taxonomic associations, the responsiveness was positively correlated with the intrinsic rate of net photosynthesis. Stomatal conductance to water vapor after 4 hours of ethylene exposure declined statistically in 6 of the 13 species. As a function of control rates, the most marked and statistically significant responses of stomatal conductance were in Glycine max (-53.6%), Gossypium hirsutum (-51.2%), Arachis hypogaea (-42.7%), Phaseolus vulgaris (-38.6%), Raphanus sativus (-26.8%), and Solanum tuberosum (-23.4%). Although ethylene-induced changes in net photosynthesis and stomatal conductance were positively correlated, there were speciesspecifi'c exceptions in which net photosynthesis declined after 4 hours of exposure without a concurrent change in stomatal conductance, stomatal conductance declined without a change in net photosynthesis, and the decline in stomatal conductance substantially exceeded the corresponding decline in net photosynthesis. Thus, the responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor were not consistently synchronous or equivalent among the 13 species. It is concluded that foliar gas exchange is responsive to exogenously applied ethylene in many plant species. The sensitivity of foliar gas exchange to ethylene may play a role in general plant response to environmental stress in which one of the physiological sites of action for endogenously produced stress ethylene in the leaf is the plant's photosynthetic capacity and/or
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Claims 19
Claim · model-written summary
In 7 of 13 species, net photosynthesis was statistically inhibited by 4 hours of ethylene exposure.
- Taxon
- herbaceous speciese0
- Treatment
- ethylene exposuree1
- Outcome
- net photosynthesise1
- Direction
- inhibitede1
- Value
- 7 of the 13 speciese1
Not reportedComparator
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e1“In 7 of the 13 species, net photosynthesis was inhibited statistically by 4 hours of ethylene exposure”
Claim · model-written summary
Net photosynthesis of Arachis hypogaea declined by -51.1% relative to control plants after ethylene exposure.
- Taxon
- Arachis hypogaea
Arachis hypogaeae2 - Treatment
- ethylenee0
- Outcome
- net photosynthesise0
- Direction
- decreaseinferrede2
- Value
- -51.1%e2
- Comparator
- control plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e2“As a function of the rate in control plants, the responses were most pronounced and statistically significant in Arachis hypogaea (-51.1%), Gossypium hirsutum (-31.7%), Glycine max (-24.8%), Cucurbita pepo (-20.4%), Phaseolus vulgaris (-18.4%), Setaria viridis (-17.5%), and Raphanus sativus (-4.4%)”
Claim · model-written summary
Net photosynthesis of Gossypium hirsutum declined by -31.7% relative to control plants after ethylene exposure.
- Taxon
- Gossypium hirsutum
Gossypium hirsutume2 - Treatment
- ethylenee0
- Outcome
- net photosynthesise0
- Direction
- decreaseinferrede2
- Value
- -31.7%e2
- Comparator
- control plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e2“As a function of the rate in control plants, the responses were most pronounced and statistically significant in Arachis hypogaea (-51.1%), Gossypium hirsutum (-31.7%), Glycine max (-24.8%), Cucurbita pepo (-20.4%), Phaseolus vulgaris (-18.4%), Setaria viridis (-17.5%), and Raphanus sativus (-4.4%)”
Claim · model-written summary
Net photosynthesis of Glycine max declined by -24.8% relative to control plants after ethylene exposure.
- Taxon
- Glycine max
Glycine maxe2 - Treatment
- ethylenee0
- Outcome
- net photosynthesise0
- Direction
- decreaseinferrede2
- Value
- -24.8%e2
- Comparator
- control plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e2“As a function of the rate in control plants, the responses were most pronounced and statistically significant in Arachis hypogaea (-51.1%), Gossypium hirsutum (-31.7%), Glycine max (-24.8%), Cucurbita pepo (-20.4%), Phaseolus vulgaris (-18.4%), Setaria viridis (-17.5%), and Raphanus sativus (-4.4%)”
Claim · model-written summary
Net photosynthesis of Cucurbita pepo declined by -20.4% relative to control plants after ethylene exposure.
- Taxon
- Cucurbita pepo
Cucurbita pepoe2 - Treatment
- ethylenee0
- Outcome
- net photosynthesise0
- Direction
- decreaseinferrede2
- Value
- -20.4%e2
- Comparator
- control plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e2“As a function of the rate in control plants, the responses were most pronounced and statistically significant in Arachis hypogaea (-51.1%), Gossypium hirsutum (-31.7%), Glycine max (-24.8%), Cucurbita pepo (-20.4%), Phaseolus vulgaris (-18.4%), Setaria viridis (-17.5%), and Raphanus sativus (-4.4%)”
Claim · model-written summary
Net photosynthesis of Phaseolus vulgaris declined by -18.4% relative to control plants after ethylene exposure.
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarise2 - Treatment
- ethylenee0
- Outcome
- net photosynthesise0
- Direction
- decreaseinferrede2
- Value
- -18.4%e2
- Comparator
- control plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e2“As a function of the rate in control plants, the responses were most pronounced and statistically significant in Arachis hypogaea (-51.1%), Gossypium hirsutum (-31.7%), Glycine max (-24.8%), Cucurbita pepo (-20.4%), Phaseolus vulgaris (-18.4%), Setaria viridis (-17.5%), and Raphanus sativus (-4.4%)”
Claim · model-written summary
Net photosynthesis of Setaria viridis declined by -17.5% relative to control plants after ethylene exposure.
- Taxon
- Setaria viridis
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Setaria viridise2 - Treatment
- ethylenee0
- Outcome
- net photosynthesise0
- Direction
- decreaseinferrede2
- Value
- -17.5%e2
- Comparator
- control plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e2“As a function of the rate in control plants, the responses were most pronounced and statistically significant in Arachis hypogaea (-51.1%), Gossypium hirsutum (-31.7%), Glycine max (-24.8%), Cucurbita pepo (-20.4%), Phaseolus vulgaris (-18.4%), Setaria viridis (-17.5%), and Raphanus sativus (-4.4%)”
Claim · model-written summary
Net photosynthesis of Raphanus sativus declined by -4.4% relative to control plants after ethylene exposure.
- Taxon
- Raphanus sativus
Raphanus sativuse2 - Treatment
- ethylenee0
- Outcome
- net photosynthesise0
- Direction
- decreaseinferrede2
- Value
- -4.4%e2
- Comparator
- control plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e2“As a function of the rate in control plants, the responses were most pronounced and statistically significant in Arachis hypogaea (-51.1%), Gossypium hirsutum (-31.7%), Glycine max (-24.8%), Cucurbita pepo (-20.4%), Phaseolus vulgaris (-18.4%), Setaria viridis (-17.5%), and Raphanus sativus (-4.4%)”
Claim · model-written summary
Net photosynthesis responsiveness to ethylene was positively correlated with the intrinsic rate of net photosynthesis.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e3“the responsiveness was positively correlated with the intrinsic rate of net photosynthesis”
Claim · model-written summary
Stomatal conductance to water vapor declined statistically in 6 of 13 species after 4 hours of ethylene exposure.
- Taxon
- herbaceous speciese0
- Treatment
- ethylene exposuree4
- Outcome
- Stomatal conductance to water vapore4
- Direction
- declinede4
- Value
- 6 of the 13 speciese4
Not reportedComparator
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e4“Stomatal conductance to water vapor after 4 hours of ethylene exposure declined statistically in 6 of the 13 species”
Claim · model-written summary
Stomatal conductance of Glycine max declined by -53.6% relative to control rates after ethylene exposure.
- Taxon
- Glycine maxGlycine maxe5
- Treatment
- ethylenee0
- Outcome
- stomatal conductancee5
- Direction
- decreaseinferrede5
- Value
- -53.6%e5
- Comparator
- control ratese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e5“As a function of control rates, the most marked and statistically significant responses of stomatal conductance were in Glycine max (-53.6%), Gossypium hirsutum (-51.2%), Arachis hypogaea (-42.7%), Phaseolus vulgaris (-38.6%), Raphanus sativus (-26.8%), and Solanum tuberosum (-23.4%)”
Claim · model-written summary
Stomatal conductance of Gossypium hirsutum declined by -51.2% relative to control rates after ethylene exposure.
- Taxon
- Gossypium hirsutumGossypium hirsutume5
- Treatment
- ethylenee0
- Outcome
- stomatal conductancee5
- Direction
- decreaseinferrede5
- Value
- -51.2%e5
- Comparator
- control ratese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e5“As a function of control rates, the most marked and statistically significant responses of stomatal conductance were in Glycine max (-53.6%), Gossypium hirsutum (-51.2%), Arachis hypogaea (-42.7%), Phaseolus vulgaris (-38.6%), Raphanus sativus (-26.8%), and Solanum tuberosum (-23.4%)”
Claim · model-written summary
Stomatal conductance of Arachis hypogaea declined by -42.7% relative to control rates after ethylene exposure.
- Taxon
- Arachis hypogaeaArachis hypogaeae5
- Treatment
- ethylenee0
- Outcome
- stomatal conductancee5
- Direction
- decreaseinferrede5
- Value
- -42.7%e5
- Comparator
- control ratese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e5“As a function of control rates, the most marked and statistically significant responses of stomatal conductance were in Glycine max (-53.6%), Gossypium hirsutum (-51.2%), Arachis hypogaea (-42.7%), Phaseolus vulgaris (-38.6%), Raphanus sativus (-26.8%), and Solanum tuberosum (-23.4%)”
Claim · model-written summary
Stomatal conductance of Phaseolus vulgaris declined by -38.6% relative to control rates after ethylene exposure.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise5
- Treatment
- ethylenee0
- Outcome
- stomatal conductancee5
- Direction
- decreaseinferrede5
- Value
- -38.6%e5
- Comparator
- control ratese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e5“As a function of control rates, the most marked and statistically significant responses of stomatal conductance were in Glycine max (-53.6%), Gossypium hirsutum (-51.2%), Arachis hypogaea (-42.7%), Phaseolus vulgaris (-38.6%), Raphanus sativus (-26.8%), and Solanum tuberosum (-23.4%)”
Claim · model-written summary
Stomatal conductance of Raphanus sativus declined by -26.8% relative to control rates after ethylene exposure.
- Taxon
- Raphanus sativusRaphanus sativuse5
- Treatment
- ethylenee0
- Outcome
- stomatal conductancee5
- Direction
- decreaseinferrede5
- Value
- -26.8%e5
- Comparator
- control ratese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e5“As a function of control rates, the most marked and statistically significant responses of stomatal conductance were in Glycine max (-53.6%), Gossypium hirsutum (-51.2%), Arachis hypogaea (-42.7%), Phaseolus vulgaris (-38.6%), Raphanus sativus (-26.8%), and Solanum tuberosum (-23.4%)”
Claim · model-written summary
Stomatal conductance of Solanum tuberosum declined by -23.4% relative to control rates after ethylene exposure.
- Taxon
- Solanum tuberosum
Solanum tuberosume5 - Treatment
- ethylenee0
- Outcome
- stomatal conductancee5
- Direction
- decreaseinferrede5
- Value
- -23.4%e5
- Comparator
- control ratese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e5“As a function of control rates, the most marked and statistically significant responses of stomatal conductance were in Glycine max (-53.6%), Gossypium hirsutum (-51.2%), Arachis hypogaea (-42.7%), Phaseolus vulgaris (-38.6%), Raphanus sativus (-26.8%), and Solanum tuberosum (-23.4%)”
Claim · model-written summary
Ethylene-induced changes in net photosynthesis and stomatal conductance were positively correlated.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e6“Although ethylene-induced changes in net photosynthesis and stomatal conductance were positively correlated”
Claim · model-written summary
The responses of net photosynthesis and stomatal conductance were not consistently synchronous or equivalent among the 13 species.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e7“Thus, the responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor were not consistently synchronous or equivalent among the 13 species”
Claim · model-written summary
Foliar gas exchange is responsive to exogenously applied ethylene in many plant species.
Verbatim
e0“The responsiveness to ethylene of net photosynthesis and stomatal conductance to water vapor in intact plants was investigated in 13 herbaceous species representing seven plant families”
e1“It is concluded that foliar gas exchange is responsive to exogenously applied ethylene in many plant species”
The same questions in other papers
ethene · physiology: gas exchange · Glycine max (soybean)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
ethene · physiology: photosynthesis · Gossypium hirsutum (cotton)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
ethene · physiology: photosynthesis · Arachis hypogaea (peanut)Results agree
1 paper in the same direction as this paper
- negative
ethene · physiology: photosynthesis · Cucurbita pepoResults agree
1 paper in the same direction as this paper
- negative
ethene · physiology: photosynthesis · Phaseolus vulgaris (common bean)Results agree
1 paper in the same direction as this paper
- negative
ethene · physiology: photosynthesis · Setaria viridisResults agree
1 paper in the same direction as this paper
- negative
ethene · physiology: photosynthesis · Raphanus sativus (radish)Results agree
1 paper in the same direction as this paper
- negative
ethene · physiology: gas exchange · Arachis hypogaea (peanut)Results agree
1 paper in the same direction as this paper
- negative
8 of 13 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.