Abstract
The study treated the seedlings of watermelon pot planted in greenhouse with 5-aminolevulinic acid （ALA） at 504200 mg/L and studied their photosynthetic characteristics, carbohydrate accumulations, anti-oxidative enzyme activities and MDA contents at low temperature under weak light. It was shown that the treatments with exogenous ALA could significantly raise the net photosynthetic rate, stomatal conductance and transpiration rate of the leaves of watermelon seedlings. ALA treatments raised the activities of such anti-oxidative enzymes as SOD and POD,but exerted little influence on the CAT and APX activities in the leaves of watermelon seedlings, which implied that the ALA treatments enhanced the metabolism of active oxygen species by raising the SOD and POD activities in watermelon plants, thus maintaining the cellular photosynthetic capacity. 30 days after the ALA treatments, the dry weights, starch and solvable sugar contents of treated watermelon plants increased separately by 42%-54%, 62.2%-207.0% and 32.0%-87.1% compared with those of the control plants. The above results indicated that ALA treatments could improve the activities of anti-oxidative enzymes in watermelon seedling at low temperature under weak light,and promoted the photosynthesis and photosynthate accumulations as well as the plant growth.
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Claims 7
Claim · model-written summary
Exogenous ALA significantly raised the net photosynthetic rate, stomatal conductance and transpiration rate of watermelon seedlings.
- Taxon
- watermelon
Citrullus lanatuse0 - Treatment
- exogenous ALAe1
- Outcome
- net photosynthetic rate, stomatal conductance and transpiration ratee1
- Direction
- significantly raisee1
- Qualifier
- at low temperature under weak lighte2
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The study treated the seedlings of watermelon pot planted in greenhouse”
e1“It was shown that the treatments with exogenous ALA could significantly raise the net photosynthetic rate, stomatal conductance and transpiration rate of the leaves of watermelon seedlings”
e2“studied their photosynthetic characteristics, carbohydrate accumulations, anti-oxidative enzyme activities and MDA contents at low temperature under weak light”
Claim · model-written summary
ALA treatments raised the activities of the anti-oxidative enzymes SOD and POD in watermelon leaves.
- Taxon
- watermelonCitrullus lanatuse1
- Organ / stage
- leavese1
- Treatment
- ALA treatmentse1
- Gene
- SOD and PODe1
- Outcome
- activities of such anti-oxidative enzymese1
- Direction
- raisede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“ALA treatments raised the activities of such anti-oxidative enzymes as SOD and POD,but exerted little influence on the CAT and APX activities in the leaves of watermelon seedlings”
Claim · model-written summary
ALA treatments had little influence on the CAT and APX activities in watermelon leaves.
- Taxon
- watermelonCitrullus lanatuse1
- Organ / stage
- leavese1
- Treatment
- ALA treatmentse1
- Gene
- CAT and APXe1
- Outcome
- CAT and APX activitiese1
- Direction
- exerted little influencee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“ALA treatments raised the activities of such anti-oxidative enzymes as SOD and POD,but exerted little influence on the CAT and APX activities in the leaves of watermelon seedlings”
Claim · model-written summary
ALA raised SOD and POD activities, which the authors interpret as enhancing active oxygen metabolism and maintaining cellular photosynthetic capacity.
- Taxon
- watermelonCitrullus lanatuse1
- Gene
- SOD and PODe1
- Outcome
- cellular photosynthetic capacitye1
- Qualifier
- enhanced the metabolism of active oxygen speciese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the ALA treatments enhanced the metabolism of active oxygen species by raising the SOD and POD activities in watermelon plants, thus maintaining the cellular photosynthetic capacity”
Claim · model-written summary
Dry weight of ALA-treated watermelon plants increased by 42%-54% compared with control plants 30 days after treatment.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- ALA treatmentse1
- Outcome
- dry weightse1
- Direction
- increasede1
- Value
- 42%-54%e1
- Comparator
- control plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“30 days after the ALA treatments, the dry weights, starch and solvable sugar contents of treated watermelon plants increased separately by 42%-54%, 62.2%-207.0% and 32.0%-87.1% compared with those of the control plants”
Claim · model-written summary
Starch content of ALA-treated watermelon plants increased by 62.2%-207.0% compared with control plants 30 days after treatment.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- ALA treatmentse1
- Outcome
- starche1
- Direction
- increasede1
- Value
- 62.2%-207.0%e1
- Comparator
- control plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“30 days after the ALA treatments, the dry weights, starch and solvable sugar contents of treated watermelon plants increased separately by 42%-54%, 62.2%-207.0% and 32.0%-87.1% compared with those of the control plants”
Claim · model-written summary
Soluble sugar content of ALA-treated watermelon plants increased by 32.0%-87.1% compared with control plants 30 days after treatment.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- ALA treatmentse1
- Outcome
- solvable sugar contentse1
- Direction
- increasede1
- Value
- 32.0%-87.1%e1
- Comparator
- control plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“30 days after the ALA treatments, the dry weights, starch and solvable sugar contents of treated watermelon plants increased separately by 42%-54%, 62.2%-207.0% and 32.0%-87.1% compared with those of the control plants”
The same questions in other papers
5-aminolevulinic acid · physiology: antioxidant enzymes · Citrullus lanatus (watermelon)Positive and negative results
1 in the opposite direction
- positive
5-aminolevulinic acid · physiology: photosynthesis · Citrullus lanatus (watermelon)Results agree
1 paper in the same direction as this paper
- positive
5-aminolevulinic acid · physiology: enzyme activity · Citrullus lanatus (watermelon)Results agree
1 paper in the same direction as this paper
- positive
5-aminolevulinic acid · growth · Citrullus lanatus (watermelon)Results agree
1 paper in the same direction as this paper
- 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.