Abstract
I- 107 Populus euramericana seedlings growing in pots were subjected to four different water treatments( normal irrigation,light drought,moderate drought and severe drought) in this experiment. The contents of tissue water,osmotic regulation substances,MDA and activities of antioxidant enzymes in leaves of poplar were tested. The results showed that with the increasing extent and duration of water stress,the leaf relative water content and free water content of I- 107 Populus euramericana seedlings decreased significantly. The bound water content and the ratio of bound water to free water in leaves rose gradually under light water stress,but had a trend of increasing firstly and decreasing then under moderate and severe water stress. With regard to praline content,it had no significant difference with the control under light stress,while was significantly higher than the control under either moderate or severe stress. The leaf soluble protein content increased consistently under light stress,however,had a trend of first up then down under both moderate and severe stress. The activities of superoxide dismutase( SOD) and catalase( CAT) decreased after an initial increase and the malondialdehyde( MDA) content had a significant increase. As a result,the I-107 Populus euramericana seedlings had relatively stronger mechanisms of antioxidant defense and osmotic regulation under light water stress,but decreased significantly under both moderate and severe water stress.
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Claims 11
Claim · model-written summary
Water stress significantly decreased leaf relative water content and free water content of I-107 Populus euramericana seedlings, with increasing extent and duration of stress.
- Taxon
- Populus euramericana
Populus ×canadensise1 - Material
- I- 107e1
- Organ / stage
- leafe1
- Treatment
- water stresse2
- Outcome
- leaf relative water content and free water contente1
- Direction
- decreasede1
- Qualifier
- with the increasing extent and duration of water stresse2
- Comparator
- normal irrigatione0
- Setting
- potse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I- 107 Populus euramericana seedlings growing in pots were subjected to four different water treatments( normal irrigation,light drought,moderate drought and severe drought)”
e1“the leaf relative water content and free water content of I- 107 Populus euramericana seedlings decreased significantly”
e2“with the increasing extent and duration of water stress”
Claim · model-written summary
Under light water stress, bound water content and the bound-to-free water ratio in leaves rose gradually.
- Taxon
- Populus euramericanaPopulus ×canadensise0
- Organ / stage
- leavese3
- Treatment
- light water stresse3
- Outcome
- bound water content and the ratio of bound water to free water in leavese3
- Direction
- rose graduallye3
- Comparator
- normal irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I- 107 Populus euramericana seedlings growing in pots were subjected to four different water treatments( normal irrigation,light drought,moderate drought and severe drought)”
e3“The bound water content and the ratio of bound water to free water in leaves rose gradually under light water stress”
Claim · model-written summary
Under moderate and severe water stress, bound water content and the bound-to-free water ratio in leaves first increased and then decreased.
- Taxon
- Populus euramericanaPopulus ×canadensise0
- Organ / stage
- leavese4
- Treatment
- moderate and severe water stresse4
- Outcome
- bound water content and the ratio of bound water to free water in leavese4
- Direction
- increasing firstly and decreasing thene4
- Comparator
- normal irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I- 107 Populus euramericana seedlings growing in pots were subjected to four different water treatments( normal irrigation,light drought,moderate drought and severe drought)”
e4“The bound water content and the ratio of bound water to free water in leaves rose gradually under light water stress,but had a trend of increasing firstly and decreasing then under moderate and severe water stress”
Claim · model-written summary
Under light water stress, proline content did not differ significantly from the control.
- Taxon
- Populus euramericanaPopulus ×canadensise0
- Treatment
- light stresse5
- Outcome
- praline contente5
- Direction
- no significant differencee5
- Comparator
- the controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I- 107 Populus euramericana seedlings growing in pots were subjected to four different water treatments( normal irrigation,light drought,moderate drought and severe drought)”
e5“With regard to praline content,it had no significant difference with the control under light stress”
Claim · model-written summary
Under moderate or severe water stress, proline content was significantly higher than the control.
- Taxon
- Populus euramericanaPopulus ×canadensise0
- Treatment
- moderate or severe stresse6
- Outcome
- praline contente5
- Direction
- significantly highere6
- Comparator
- the controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I- 107 Populus euramericana seedlings growing in pots were subjected to four different water treatments( normal irrigation,light drought,moderate drought and severe drought)”
e5“With regard to praline content,it had no significant difference with the control under light stress”
e6“while was significantly higher than the control under either moderate or severe stress”
Claim · model-written summary
Under light water stress, leaf soluble protein content increased consistently.
- Taxon
- Populus euramericanaPopulus ×canadensise0
- Organ / stage
- leafe7
- Treatment
- light stresse7
- Outcome
- leaf soluble protein contente7
- Direction
- increased consistentlye7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I- 107 Populus euramericana seedlings growing in pots were subjected to four different water treatments( normal irrigation,light drought,moderate drought and severe drought)”
e7“The leaf soluble protein content increased consistently under light stress,however,had a trend of first up then down under both moderate and severe stress”
Claim · model-written summary
Under moderate and severe water stress, leaf soluble protein content first rose and then fell.
- Taxon
- Populus euramericanaPopulus ×canadensise0
- Organ / stage
- leafe7
- Treatment
- moderate and severe stresse7
- Outcome
- leaf soluble protein contente7
- Direction
- first up then downe7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I- 107 Populus euramericana seedlings growing in pots were subjected to four different water treatments( normal irrigation,light drought,moderate drought and severe drought)”
e7“The leaf soluble protein content increased consistently under light stress,however,had a trend of first up then down under both moderate and severe stress”
Claim · model-written summary
Activities of superoxide dismutase and catalase decreased after an initial increase under the water treatments.
- Taxon
- Populus euramericanaPopulus ×canadensise0
- Treatment
- water treatmentse0
- Outcome
- activities of superoxide dismutase( SOD) and catalase( CAT)e2
- Direction
- decreased after an initial increasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I- 107 Populus euramericana seedlings growing in pots were subjected to four different water treatments( normal irrigation,light drought,moderate drought and severe drought)”
e2“The activities of superoxide dismutase( SOD) and catalase( CAT) decreased after an initial increase”
Claim · model-written summary
Malondialdehyde content increased significantly under the water treatments.
- Taxon
- Populus euramericanaPopulus ×canadensise0
- Treatment
- water treatmentse0
- Outcome
- malondialdehyde( MDA) contente1
- Direction
- significant increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I- 107 Populus euramericana seedlings growing in pots were subjected to four different water treatments( normal irrigation,light drought,moderate drought and severe drought)”
e1“the malondialdehyde( MDA) content had a significant increase”
Claim · model-written summary
Under light water stress, the seedlings had relatively stronger antioxidant defence and osmotic regulation mechanisms.
- Taxon
- Populus euramericanaPopulus ×canadensise1
- Treatment
- light water stresse1
- Outcome
- mechanisms of antioxidant defense and osmotic regulatione1
- Direction
- relatively strongere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the I-107 Populus euramericana seedlings had relatively stronger mechanisms of antioxidant defense and osmotic regulation under light water stress”
Claim · model-written summary
Moderate and severe water stress significantly decreased antioxidant defence and osmotic regulation.
- Taxon
- Populus euramericanaPopulus ×canadensise0
- Treatment
- moderate and severe water stresse2
- Outcome
- antioxidant defense and osmotic regulatione1
- Direction
- decreased significantlye2
- Comparator
- light water stresse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I- 107 Populus euramericana seedlings growing in pots were subjected to four different water treatments( normal irrigation,light drought,moderate drought and severe drought)”
e1“the I-107 Populus euramericana seedlings had relatively stronger mechanisms of antioxidant defense and osmotic regulation under light water stress”
e2“but decreased significantly under both moderate and severe water stress”
The same questions in other papers
drought · physiology: water · Populus x canadensis (hybrid black poplar)Results agree
1 paper in the same direction as this paper
- negative
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.