Abstract
In order to distinguish the different physiological response of the roots and shoots of rice to water stress,the effects of different nitrogen forms on the growth of rice seedlings were studied by using a split-root system and simulated water stress(by adding 100 g/L PEG6000) with three nitrogen forms(NH_4~+,NO_3~-and mixture of NH_4~+ and NO_3~-) supply.The results showed that: 1) The growth of NO_3~--N supplied rice plants were significantly inhibited by water stress,however,no pronounced differences were found under NH_4~+-N supply.The biomass of rice was not affected by partial-root water stress in the three nitrogen forms,but rice root parameters with sole nitrate supply decreased significantly under water stress compared to those without water stress.2) Water stress stimulated the absorption of NO_3~--N.3)The photosynthesis was inhibited by water stress under NO_3~--N supply,but no effects were noted under NH_4~+-N supply;the physiological water use efficiency was not affected by either total or partial-root water stress under three nitrogen forms.4)Under the total water stress,photosynthetic nitrogen use efficiency was decreased under NO_3~--N supply.
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Claims 10
Claim · model-written summary
Water stress inhibited growth under nitrate nitrogen.
- Taxon
- rice
Oryza sativae0 - Treatment
- water stresse0
- Outcome
- growthe0
- Direction
- inhibitede0
- Qualifier
- NO_3~--N suppliede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth of NO_3~--N supplied rice plants were significantly inhibited by water stress”
Claim · model-written summary
Growth under ammonium nitrogen showed no pronounced water stress difference.
- Taxon
- riceOryza sativae1
- Treatment
- water stresse1
- Outcome
- growthe2
- Direction
- no pronounced differencese0
- Qualifier
- NH_4~+-N supplye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no pronounced differences were found under NH_4~+-N supply”
e1“rice plants were significantly inhibited by water stress”
e2“The growth of NO_3~--N supplied rice plants were significantly inhibited by water stress”
Claim · model-written summary
Partial-root water stress did not affect rice biomass under the three nitrogen forms.
- Taxon
- riceOryza sativae0
- Treatment
- partial-root water stresse0
- Outcome
- biomasse0
- Direction
- not affectede0
- Qualifier
- three nitrogen formse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The biomass of rice was not affected by partial-root water stress in the three nitrogen forms”
Claim · model-written summary
Under sole nitrate, water stress significantly reduced rice root parameters.
- Taxon
- riceOryza sativae0
- Treatment
- water stresse0
- Outcome
- root parameterse0
- Direction
- decreasede0
- Qualifier
- sole nitrate supplye0
- Comparator
- without water stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice root parameters with sole nitrate supply decreased significantly under water stress compared to those without water stress”
Claim · model-written summary
Water stress stimulated nitrate nitrogen absorption.
- Taxon
- riceOryza sativae1
- Treatment
- Water stresse0
- Outcome
- absorption of NO_3~--Ne0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress stimulated the absorption of NO_3~--N”
e1“rice root parameters”
Claim · model-written summary
Under nitrate nitrogen, water stress inhibited photosynthesis.
- Taxon
- riceOryza sativae1
- Treatment
- water stresse0
- Outcome
- photosynthesise0
- Direction
- inhibitede0
- Qualifier
- NO_3~--N supplye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthesis was inhibited by water stress under NO_3~--N supply”
e1“rice plants”
Claim · model-written summary
Under ammonium nitrogen, water stress had no reported photosynthesis effect.
- Taxon
- riceOryza sativae2
- Treatment
- water stresse1
- Outcome
- photosynthesise1
- Direction
- no effectse0
- Qualifier
- NH_4~+-N supplye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no effects were noted under NH_4~+-N supply”
e1“The photosynthesis was inhibited by water stress under NO_3~--N supply”
e2“rice plants”
Claim · model-written summary
Total water stress did not affect physiological water use efficiency across nitrogen forms.
- Taxon
- riceOryza sativae1
- Treatment
- total water stresse2
- Outcome
- physiological water use efficiencye0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“physiological water use efficiency was not affected by either total or partial-root water stress under three nitrogen forms”
e1“rice plants”
e2“Under the total water stress,photosynthetic nitrogen use efficiency was decreased under NO_3~--N supply”
Claim · model-written summary
Partial-root water stress did not affect physiological water use efficiency across nitrogen forms.
- Taxon
- riceOryza sativae1
- Treatment
- partial-root water stresse0
- Outcome
- physiological water use efficiencye0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“physiological water use efficiency was not affected by either total or partial-root water stress under three nitrogen forms”
e1“rice plants”
Claim · model-written summary
Under nitrate nitrogen, total water stress decreased photosynthetic nitrogen use efficiency.
- Taxon
- riceOryza sativae1
- Treatment
- total water stresse0
- Outcome
- photosynthetic nitrogen use efficiencye0
- Direction
- decreasede0
- Qualifier
- NO_3~--N supplye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the total water stress,photosynthetic nitrogen use efficiency was decreased under NO_3~--N supply”
e1“rice plants”
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See all 282 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.