Abstract
In this study,the effects of the water stress on rice root and yield were studied. Gui liang you 2 was taken as material and polyethylene glycol(PEG—6000)was used to simulate the different degrees of water stress.After dealt with water stress for 16 days at tillering stage and heading stage respectively,the material was supplied with nutrition as normal. The morphological traits and activity and dry matter of rice root were measured after the period of re-watering,and grain yield was measured during the mature period. The results showed that:The root activity could be enhanced owning to moderate water stress at tillering and heading stage. The drought tolerance of rice root at different stages is not the same,the root length,root surface area,root volume can be promoted owing to mild or moderate water stress during water stress of tillering stage,the promoting effects is not significant after re-watering; while water stress at heading stage,the inhibitory action of water stress to root growth is not significant,the root of light,moderate water stress was stronger than that of the control after re-watering.Ten days after re-watering at tillering stage,the qualities of root dry matter and shoot dry matter of control were the highest. Ten days after re-watering at heading stage,the quantities of root dry matter and shoot dry matter with mild and moderate treatment higher than those of the control,and there was a drastic contrast between the qualities of root dry matter and shoot dry matter and those of the control. In maturation stage,the qualities of root dry matter dealt with all kinds of water stress at tillering and heading stag are higher than those of the control. However,it was only with mild treatment at tillering stage that the quality of shoot dry matter and grain yield were higher than that of the control,The quality of shoot dry matter and grain yield with normal water treatment at heading stage was up to its summit. The grain yield with suitable water stress at tillering and heading stage do not significant reduce the yield of rice. Severe water stress does not inhibit root growth,but it decreases the yield of rice significantly.
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Claims 17
Claim · model-written summary
Moderate water stress at tillering enhanced rice root activity.
Not reportedTaxonComparator
Verbatim
e0“The root activity could be enhanced owning to moderate water stress at tillering and heading stage.”
t0“Rice”
Claim · model-written summary
Moderate water stress at heading enhanced rice root activity.
- Organ / stage
- heading stagee0
- Treatment
- moderate water stresse0
- Outcome
- root activitye0
- Direction
- enhancede0
Not reportedTaxonComparator
Verbatim
e0“The root activity could be enhanced owning to moderate water stress at tillering and heading stage.”
t0“Rice”
Claim · model-written summary
Mild or moderate stress during tillering promoted rice root length, surface area and volume.
- Organ / stage
- tillering stagee0
- Treatment
- mild or moderate water stresse0
- Outcome
- root length,root surface area,root volumee0
- Direction
- promotede0
Not reportedTaxonComparator
Verbatim
e0“the root length,root surface area,root volume can be promoted owing to mild or moderate water stress during water stress of tillering stage”
t0“Rice”
Claim · model-written summary
The root growth promotion after tillering stress was not significant after rewatering.
Not reportedTaxon
Verbatim
e0“the promoting effects is not significant after re-watering”
t0“Rice”
Claim · model-written summary
Heading-stage stress did not significantly inhibit root growth.
Not reportedTaxonComparator
Verbatim
e0“while water stress at heading stage,the inhibitory action of water stress to root growth is not significant”
t0“Rice”
Claim · model-written summary
After rewatering, roots following light or moderate heading-stage stress were stronger than controls.
- Treatment
- light,moderate water stresse0
- Outcome
- roote0
- Direction
- strongere0
- Qualifier
- after re-wateringe0
- Comparator
- the controle0
Not reportedTaxon
Verbatim
e0“the root of light,moderate water stress was stronger than that of the control after re-watering.”
t0“Rice”
Claim · model-written summary
Ten days after rewatering from tillering treatment, controls had the highest root dry matter.
Not reportedTaxon
Verbatim
e0“Ten days after re-watering at tillering stage,the qualities of root dry matter and shoot dry matter of control were the highest.”
t0“Rice”
Claim · model-written summary
Ten days after rewatering from tillering treatment, controls had the highest shoot dry matter.
Not reportedTaxon
Verbatim
e0“Ten days after re-watering at tillering stage,the qualities of root dry matter and shoot dry matter of control were the highest.”
t0“Rice”
Claim · model-written summary
Ten days after rewatering from heading treatment, mild and moderate stress gave higher root dry matter than controls.
- Organ / stage
- heading stagee0
- Treatment
- mild and moderate treatmente0
- Outcome
- root dry mattere0
- Direction
- highere0
- Comparator
- the controle0
Not reportedTaxon
Verbatim
e0“Ten days after re-watering at heading stage,the quantities of root dry matter and shoot dry matter with mild and moderate treatment higher than those of the control”
t0“Rice”
Claim · model-written summary
Ten days after rewatering from heading treatment, mild and moderate stress gave higher shoot dry matter than controls.
- Organ / stage
- heading stagee0
- Treatment
- mild and moderate treatmente0
- Outcome
- shoot dry mattere0
- Direction
- highere0
- Comparator
- the controle0
Not reportedTaxon
Verbatim
e0“Ten days after re-watering at heading stage,the quantities of root dry matter and shoot dry matter with mild and moderate treatment higher than those of the control”
t0“Rice”
Claim · model-written summary
At maturation, root dry matter after all tested stresses at tillering and heading exceeded controls.
- Organ / stage
- maturation stagee0
- Treatment
- all kinds of water stresse0
- Outcome
- root dry mattere0
- Direction
- highere0
- Comparator
- the controle0
Not reportedTaxon
Verbatim
e0“In maturation stage,the qualities of root dry matter dealt with all kinds of water stress at tillering and heading stag are higher than those of the control.”
t0“Rice”
Claim · model-written summary
Only mild tillering-stage treatment gave higher shoot dry matter than control.
- Treatment
- mild treatment at tillering stagee0
- Outcome
- shoot dry mattere0
- Direction
- highere0
- Comparator
- the controle0
Not reportedTaxon
Verbatim
e0“it was only with mild treatment at tillering stage that the quality of shoot dry matter and grain yield were higher than that of the control”
t0“Rice”
Claim · model-written summary
Only mild tillering-stage treatment gave higher grain yield than control.
- Treatment
- mild treatment at tillering stagee0
- Outcome
- grain yielde0
- Direction
- highere0
- Comparator
- the controle0
Not reportedTaxon
Verbatim
e0“it was only with mild treatment at tillering stage that the quality of shoot dry matter and grain yield were higher than that of the control”
t0“Rice”
Claim · model-written summary
Normal water treatment at heading produced the highest shoot dry matter and grain yield.
- Organ / stage
- heading stagee0
- Treatment
- normal water treatmente0
- Outcome
- shoot dry matter and grain yielde0
- Direction
- up to its summite0
Not reportedTaxon
Verbatim
e0“The quality of shoot dry matter and grain yield with normal water treatment at heading stage was up to its summit.”
t0“Rice”
Claim · model-written summary
Suitable stress at tillering and heading did not significantly reduce rice grain yield.
- Taxon
- rice
Oryza sativae0 - Treatment
- suitable water stresse0
- Outcome
- grain yielde0
- Direction
- do not significant reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yield with suitable water stress at tillering and heading stage do not significant reduce the yield of rice.”
Claim · model-written summary
Severe water stress did not inhibit rice root growth.
- Taxon
- riceOryza sativae0
- Treatment
- Severe water stresse0
- Outcome
- root growthe0
- Direction
- does not inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe water stress does not inhibit root growth,but it decreases the yield of rice significantly.”
Claim · model-written summary
Severe water stress significantly decreased rice yield.
- Taxon
- riceOryza sativae0
- Treatment
- Severe water stresse0
- Outcome
- yielde0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe water stress does not inhibit root growth,but it decreases the yield of rice significantly.”
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