Paper · 1972 · Canadian Journal of Botany

Abscisic acid protects bean leaves from ozone-induced phytotoxicity

R. A. Fletcher; N. O. Adedipe; D. P. Ormrod

5
claims
9
verbatim quotes
33
citations
1
research areas
—
Not open access

Abstract

Abscisic acid treatment of primary bean leaves caused a partial closure of stomates and thus considerably reduced the phytotoxicity of ozone. The symptoms of ozone-induced phytotoxicity in the water-treated leaves are a marked decrease in chlorophyll and slight decreases in the levels of protein and RNA. The evidence indicates that ozone injury to leaves is not metabolically related to normal leaf senescence.

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Claims 5

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Abscisic acid treatment considerably reduced ozone phytotoxicity in bean leaves compared with water-treated leaves.

Taxon
beane1
Treatment
Abscisic acide1
Outcome
phytotoxicity of ozonee1
Direction
reducede1
Comparator
water-treatede2

Verbatim

e1

“Abscisic acid treatment of primary bean leaves caused a partial closure of stomates and thus considerably reduced the phytotoxicity of ozone”

✓ located verbatim in the source · abstract, characters 0–140 · show in text ↑
e2

“The symptoms of ozone-induced phytotoxicity in the water-treated leaves”

✓ located verbatim in the source · abstract, characters 142–213 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Abscisic acid caused a partial closure of stomates in bean leaves.

Taxon
beane1
Treatment
Abscisic acide1
Outcome
partial closure of stomatese1

Not reportedComparatorDirection

Verbatim

e1

“Abscisic acid treatment of primary bean leaves caused a partial closure of stomates”

✓ located verbatim in the source · abstract, characters 0–83 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Ozone-induced phytotoxicity in water-treated bean leaves was accompanied by a marked decrease in chlorophyll.

Taxon
beant0
Treatment
ozone-induced phytotoxicitye2
Outcome
chlorophylle2
Direction
decreasee2

Verbatim

t0

“bean leaves”

✓ located verbatim in the source · title, characters 23–34 · show in text ↑
e2

“The symptoms of ozone-induced phytotoxicity in the water-treated leaves are a marked decrease in chlorophyll”

✓ located verbatim in the source · abstract, characters 142–250 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Ozone-induced phytotoxicity in water-treated bean leaves was accompanied by slight decreases in protein and RNA levels.

Taxon
beant0
Outcome
levels of protein and RNAe2
Direction
decreasese2
Qualifier
slighte2

Verbatim

t0

“bean leaves”

✓ located verbatim in the source · title, characters 23–34 · show in text ↑
e2

“slight decreases in the levels of protein and RNA”

✓ located verbatim in the source · abstract, characters 255–304 · show in text ↑
Mechanismauthor interpretationoriginal resultno effectmeasured

Claim · model-written summary

Ozone injury to bean leaves is not metabolically related to normal leaf senescence.

Taxon
beant0
Outcome
ozone injury to leavese3
Qualifier
not metabolically related to normal leaf senescencee3

Verbatim

t0

“bean leaves”

✓ located verbatim in the source · title, characters 23–34 · show in text ↑
e3

“The evidence indicates that ozone injury to leaves is not metabolically related to normal leaf senescence”

✓ located verbatim in the source · abstract, characters 306–411 · show in text ↑