Abstract
Veinal chlorosis was induced in the lower leaves of young maize plants following treatment with atrazine (2-chloro-4-ethylamino-6- isopropylamino-s-triazine). An ultrastructural investigation indicated that mesophyll chloroplasts, consisting of grana, thylakoids and stroma showed severe disintegration. The seemingly unaffected bundle sheath chloroplasts with stroma, thylakoids and sometimes a few rudimentary grana which normally only show PS I activity, appeared to transform to mesophyll-type chloroplasts with formation of small granai stacks. The mesophyll chloroplasts became more spherical and various ultrastructural changes became visible. The thylakoid system was destroyed, the granai compartments became swollen and the double-layered membrane broke down, leading to disintegration of the chloroplast. Atrazine had little effect on the bundle sheath chloroplasts except in a few cases where the chloroplast membrane exhibited swellings. At rates of 6 ppm atrazine, or prolonged treatment with 3 ppm atrazine, bundle sheath chloroplasts were devoid of starch granules. S. Air. J. Plant Soil 1985, 2: 27–30
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Claims 9
Claim · model-written summary
Atrazine induced veinal chlorosis in the lower leaves of young maize plants.
Zea maysNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Veinal chlorosis was induced in the lower leaves of young maize plants following treatment with atrazine”
Claim · model-written summary
Atrazine caused severe disintegration of mesophyll chloroplasts in maize.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Veinal chlorosis was induced in the lower leaves of young maize plants following treatment with atrazine”
e2“mesophyll chloroplasts, consisting of grana, thylakoids and stroma showed severe disintegration”
Claim · model-written summary
Bundle sheath chloroplasts of atrazine-treated maize appeared to transform into mesophyll-type chloroplasts.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Veinal chlorosis was induced in the lower leaves of young maize plants following treatment with atrazine”
e3“The seemingly unaffected bundle sheath chloroplasts with stroma, thylakoids and sometimes a few rudimentary grana which normally only show PS I activity, appeared to transform to mesophyll-type chloroplasts with formation of small granai stacks”
Claim · model-written summary
Mesophyll chloroplasts of maize became more spherical.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Veinal chlorosis was induced in the lower leaves of young maize plants following treatment with atrazine”
e4“The mesophyll chloroplasts became more spherical”
Claim · model-written summary
The thylakoid system of mesophyll chloroplasts was destroyed in atrazine-treated maize.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Veinal chlorosis was induced in the lower leaves of young maize plants following treatment with atrazine”
e2“mesophyll chloroplasts, consisting of grana, thylakoids and stroma showed severe disintegration”
e5“The thylakoid system was destroyed, the granai compartments became swollen and the double-layered membrane broke down, leading to disintegration of the chloroplast”
Claim · model-written summary
The granal compartments of mesophyll chloroplasts became swollen in atrazine-treated maize.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Veinal chlorosis was induced in the lower leaves of young maize plants following treatment with atrazine”
e2“mesophyll chloroplasts, consisting of grana, thylakoids and stroma showed severe disintegration”
e5“The thylakoid system was destroyed, the granai compartments became swollen and the double-layered membrane broke down, leading to disintegration of the chloroplast”
Claim · model-written summary
The double-layered membrane of mesophyll chloroplasts broke down, leading to chloroplast disintegration in atrazine-treated maize.
- Organ / stage
- mesophyll chloroplastse2
- Outcome
- double-layered membrane broke downe5
- Qualifier
- leading to disintegration of the chloroplaste5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Veinal chlorosis was induced in the lower leaves of young maize plants following treatment with atrazine”
e2“mesophyll chloroplasts, consisting of grana, thylakoids and stroma showed severe disintegration”
e5“The thylakoid system was destroyed, the granai compartments became swollen and the double-layered membrane broke down, leading to disintegration of the chloroplast”
Claim · model-written summary
Atrazine had little effect on bundle sheath chloroplasts except in a few cases where the chloroplast membrane swelled.
- Organ / stage
- bundle sheath chloroplastse6
- Treatment
- Atrazinee6
- Outcome
- little effect on the bundle sheath chloroplastse6
- Qualifier
- except in a few cases where the chloroplast membrane exhibited swellingse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Veinal chlorosis was induced in the lower leaves of young maize plants following treatment with atrazine”
e6“Atrazine had little effect on the bundle sheath chloroplasts except in a few cases where the chloroplast membrane exhibited swellings”
Claim · model-written summary
At 6 ppm atrazine, or with prolonged treatment at 3 ppm, bundle sheath chloroplasts of maize were devoid of starch granules.
- Organ / stage
- bundle sheath chloroplastse7
- Treatment
- 6 ppm atrazinee7
- Outcome
- devoid of starch granulese7
- Qualifier
- or prolonged treatment with 3 ppm atrazinee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Veinal chlorosis was induced in the lower leaves of young maize plants following treatment with atrazine”
e7“At rates of 6 ppm atrazine, or prolonged treatment with 3 ppm atrazine, bundle sheath chloroplasts were devoid of starch granules”
The same questions in other papers
atrazine · physiology: pigments · Zea mays (maize)Positive and negative results
2 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
6 papers more in this group
See all 10 papers →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.