Abstract
Barley (Hordeum vulgare L. ‘Coho’), rye (Secale cereale L. ‘MSU Exp.’) and oat (Avena sativa L. ‘Gary’) seedlings were grown in nutrient solutions containing 0 and 10 −9 to 10 −7 M concentrations of 2-chloro-4,6-bis(ethylamino)- s -triazine (simazine). In kinetic studies with rye and barley seedlings, simazine increased water and nitrate uptake after 3 days' exposure to 10 −9 M simazine compared to controls; there was no effect from 10 −7 M simazine. The effect was manifested in an increase in both plant weight and total protein. After 12 days, companion plants treated with 10 −7 M simazine were the same size as controls but contained a higher protein concentration especially in the shoots. Regression analyses showed that the simazine-induced increases in total nitrogen content of the three grain species were closely related to the nitrate and water uptake, whether manifested by greater plant growth or more protein per gram of plant.
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Claims 6
Claim · model-written summary
At 10 −9 M, simazine increased water and nitrate uptake of rye and barley seedlings compared with controls after 3 days.
- Taxon
- rye and barley
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Hordeum vulgare
Secale cerealee1 - Treatment
- 10 −9 M simazinee1
- Outcome
- water and nitrate uptakee1
- Direction
- increasede1
- Qualifier
- after 3 dayse1
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“In kinetic studies with rye and barley seedlings, simazine increased water and nitrate uptake after 3 days' exposure to 10 −9 M simazine compared to controls; there was no effect from 10 −7 M simazine”
Claim · model-written summary
At 10 −7 M, simazine had no effect on uptake in rye and barley seedlings.
- Taxon
- rye and barleyHordeum vulgareSecale cerealee1
- Treatment
- 10 −7 M simazinee1
- Outcome
- uptakee1
- Direction
- no effecte1
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In kinetic studies with rye and barley seedlings, simazine increased water and nitrate uptake after 3 days' exposure to 10 −9 M simazine compared to controls; there was no effect from 10 −7 M simazine”
Claim · model-written summary
After 12 days, plants treated with 10 −7 M simazine were the same size as controls.
Verbatim
e2“After 12 days, companion plants treated with 10 −7 M simazine were the same size as controls but contained a higher protein concentration especially in the shoots”
Claim · model-written summary
After 12 days, plants treated with 10 −7 M simazine had a higher protein concentration, especially in the shoots, than controls.
Verbatim
e2“After 12 days, companion plants treated with 10 −7 M simazine were the same size as controls but contained a higher protein concentration especially in the shoots”
Claim · model-written summary
Simazine at 10 −9 M increased plant weight and total protein of rye and barley seedlings.
- Taxon
- rye and barleyHordeum vulgareSecale cerealee1
- Treatment
- 10 −9 M simazinee1
- Outcome
- plant weight and total proteine3
- Direction
- increasee3
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In kinetic studies with rye and barley seedlings, simazine increased water and nitrate uptake after 3 days' exposure to 10 −9 M simazine compared to controls; there was no effect from 10 −7 M simazine”
e3“The effect was manifested in an increase in both plant weight and total protein”
Claim · model-written summary
Simazine-induced increases in total nitrogen content were closely related to nitrate and water uptake across the three grain species.
Verbatim
e4“Regression analyses showed that the simazine-induced increases in total nitrogen content of the three grain species were closely related to the nitrate and water uptake”
The same questions in other papers
simazine · nutrient: content · Hordeum vulgare (barley)Positive and negative results
1 in the opposite direction
- 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.