Paper · 2011 · Hubei nongye kexue

Effects of Light Condition and Nitrogen Supply on Rice Root Characters and Carbon Metabolism

Li Mingjun

10
claims
20
verbatim quotes
0
citations
1
research areas
—
Not open access

Abstract

The influence of different nitrogen supply and light intensity under solution culture on root characteristic and carbon metabolism of two rice varieties,Liangyoupei-9(V1)and Shanyou-63(V2),were studied.Under high light intensity condition,total root length,root tips,root surface area,root volume,root dry weight,shoot dry weight,root/shoot and total dry weight of the two varieties increased firstly and then decreased with the increase of nitrogen level.Under low high light condition,these indexes of Liangyoupei-9 changed the same as that under high light intensity,but that of Shanyou-63 dropped continuously.Under two kinds of light condition,plant height,chlorophyll content and photosynthetic rate of the two rice varieties increased at first then dropped with the increasing of nitrogen level,whereas the plant height under low light condition,chlorophyll content and tiller number under high light conditions of V2 increased gradually.Except for the starch in V1,which dropped firstly then increased under low light condition the content of soluble sugar and soluble starch in the two rice varieties dropped gradually uner high light condition.All indexes but plant height under low light condition are lower than those under high light condition.

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Claims 10

Intervention effectobservedoriginal resultmixedmeasured

Claim · model-written summary

Under high light intensity, total root length, root tips and root surface area of the two rice varieties first increased then decreased as nitrogen level rose.

Treatment
nitrogen levele1
Outcome
total root length,root tips,root surface areae1
Direction
increased firstly and then decreasede1
Qualifier
Under high light intensity conditione1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Under high light intensity condition,total root length,root tips,root surface area,root volume,root dry weight,shoot dry weight,root/shoot and total dry weight of the two varieties increased firstly and then decreased with the increase of nitrogen level”

✓ located verbatim in the source · abstract, characters 202–455 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 50–54 · show in text ↑
Intervention effectobservedoriginal resultmixedmeasured

Claim · model-written summary

Under high light intensity, root volume, root dry weight and shoot dry weight of the two rice varieties first increased then decreased as nitrogen level rose.

Treatment
nitrogen levele1
Outcome
root volume,root dry weight,shoot dry weighte1
Direction
increased firstly and then decreasede1
Qualifier
Under high light intensity conditione1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Under high light intensity condition,total root length,root tips,root surface area,root volume,root dry weight,shoot dry weight,root/shoot and total dry weight of the two varieties increased firstly and then decreased with the increase of nitrogen level”

✓ located verbatim in the source · abstract, characters 202–455 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 50–54 · show in text ↑
Intervention effectobservedoriginal resultmixedmeasured

Claim · model-written summary

Under high light intensity, root/shoot ratio and total dry weight of the two rice varieties first increased then decreased as nitrogen level rose.

Treatment
nitrogen levele1
Outcome
root/shoot and total dry weighte1
Direction
increased firstly and then decreasede1
Qualifier
Under high light intensity conditione1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Under high light intensity condition,total root length,root tips,root surface area,root volume,root dry weight,shoot dry weight,root/shoot and total dry weight of the two varieties increased firstly and then decreased with the increase of nitrogen level”

✓ located verbatim in the source · abstract, characters 202–455 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 50–54 · show in text ↑
Intervention effectobservedoriginal resultmixedmeasured

Claim · model-written summary

Under low light, the root and dry weight indexes of Liangyoupei-9 changed with nitrogen level in the same way as under high light.

Material
Liangyoupei-9e1
Treatment
lighte1
Outcome
these indexese1
Direction
changed the same ase1
Comparator
high light intensitye1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Under low high light condition,these indexes of Liangyoupei-9 changed the same as that under high light intensity,but that of Shanyou-63 dropped continuously”

✓ located verbatim in the source · abstract, characters 456–613 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 50–54 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Under low light, the root and dry weight indexes of Shanyou-63 dropped continuously with increasing nitrogen.

Material
Shanyou-63e1
Treatment
lighte1
Outcome
these indexese1
Direction
dropped continuouslye1
Comparator
high light intensitye1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Under low high light condition,these indexes of Liangyoupei-9 changed the same as that under high light intensity,but that of Shanyou-63 dropped continuously”

✓ located verbatim in the source · abstract, characters 456–613 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 50–54 · show in text ↑
Intervention effectobservedoriginal resultmixedmeasured

Claim · model-written summary

Under both light conditions plant height, chlorophyll content and photosynthetic rate of the two rice varieties first increased then dropped with rising nitrogen level.

Treatment
nitrogen levele1
Outcome
plant height,chlorophyll content and photosynthetic ratee1
Direction
increased at first then droppede1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Under two kinds of light condition,plant height,chlorophyll content and photosynthetic rate of the two rice varieties increased at first then dropped with the increasing of nitrogen level”

✓ located verbatim in the source · abstract, characters 614–801 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 50–54 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

In V2, plant height under low light, and chlorophyll content and tiller number under high light, increased gradually.

Material
V2e1
Outcome
plant height under low light condition,chlorophyll content and tiller numbere1
Direction
increased graduallye1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“the plant height under low light condition,chlorophyll content and tiller number under high light conditions of V2 increased gradually”

✓ located verbatim in the source · abstract, characters 810–944 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 50–54 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Under high light, soluble sugar and soluble starch content of both rice varieties dropped gradually.

Outcome
content of soluble sugar and soluble starche1
Direction
dropped graduallye1
Qualifier
uner high light conditione1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“the content of soluble sugar and soluble starch in the two rice varieties dropped gradually uner high light condition”

✓ located verbatim in the source · abstract, characters 1036–1153 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 50–54 · show in text ↑
Observationobservedoriginal resultmixedmeasured

Claim · model-written summary

In V1, starch dropped first then increased under low light.

Material
V1e1
Outcome
starche1
Direction
dropped firstly then increasede1
Qualifier
under low light conditione1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“the starch in V1,which dropped firstly then increased under low light condition”

✓ located verbatim in the source · abstract, characters 956–1035 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 50–54 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

All measured indexes except plant height were lower under low light than under high light.

Treatment
low light conditione1
Outcome
All indexes but plant heighte1
Direction
lowere1
Comparator
high light conditione1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“All indexes but plant height under low light condition are lower than those under high light condition”

✓ located verbatim in the source · abstract, characters 1154–1256 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 50–54 · show in text ↑

light · growth · Oryza sativa (rice)Positive and negative results

95 papers: 55 positive, 40 negative or no effect

39 papers in the same direction as this paper · 55 in the opposite direction

  1. positive
  2. positive
  3. positive

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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.