Abstract
In order to understand the mechanism of mulberry's resistance to SO2 pollution,potted mulberry seedlings were placed in an enclosed chamber and added with SO2 with different concentrations to study the effects of SO2 on the main physiological and biochemical properties of mulberry.The results showed that sulfur content in mulberry leaves increased with the concentration of SO2 stress in the chamber.As the SO2 stress was enhanced,necrotic areas and even wilting occurred to the leaves gradually.The activity of catalase(CAT) in mulberry leaves increased with SO2 level in earlier stage and decreased in later stage after SO2 level reached 50 mg/m3.The activity of superoxide dismutase(SOD) in mulberry leaves decreased rapidly as SO2 stress was enhanced.Under relatively lower SO2 stress(10,30 mg/m3),the activity of peroxidase(POD) in mulberry leaves increased substantially and declined under relatively high SO2 stress(50 mg/m3).As SO2 stress was enhanced,chlorophyll content and net photosynthetic rate of mulberry leaves increased while proline,malonaldehyde and soluble protein contents decreased.Activity of protective enzyme was inhibited by SO2 stress which led to more serious injury,and larger necrotic areas on the leaves while photosynthetic rate declined.All these changes had negative influences on the growth and development of mulberry.
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Claims 10
Claim · model-written summary
Leaf sulfur content increased with chamber SO2 concentration.
- Taxon
- mulberrye0
- Organ / stage
- leavese0
- Treatment
- SO2 stresse0
- Outcome
- sulfur content in mulberry leavese0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“sulfur content in mulberry leaves increased with the concentration of SO2 stress in the chamber.”
Claim · model-written summary
Increasing SO2 stress caused necrosis and wilting in leaves.
MorusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Mulberry Trees”
e0“As the SO2 stress was enhanced,necrotic areas and even wilting occurred to the leaves gradually.”
Claim · model-written summary
Leaf catalase activity first rose with SO2 level, then fell after 50 mg/m3 was reached.
Verbatim
e0“The activity of catalase(CAT) in mulberry leaves increased with SO2 level in earlier stage and decreased in later stage after SO2 level reached 50 mg/m3.”
Claim · model-written summary
Leaf SOD activity rapidly declined as SO2 stress increased.
Verbatim
e0“The activity of superoxide dismutase(SOD) in mulberry leaves decreased rapidly as SO2 stress was enhanced.”
Claim · model-written summary
Leaf POD activity rose substantially under 10 and 30 mg/m3 SO2.
Verbatim
e0“Under relatively lower SO2 stress(10,30 mg/m3),the activity of peroxidase(POD) in mulberry leaves increased substantially”
Claim · model-written summary
Leaf POD activity declined under 50 mg/m3 SO2.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“declined under relatively high SO2 stress(50 mg/m3).”
t0“Mulberry Trees”
Claim · model-written summary
Increasing SO2 stress increased leaf chlorophyll content and net photosynthetic rate.
Verbatim
e0“As SO2 stress was enhanced,chlorophyll content and net photosynthetic rate of mulberry leaves increased”
Claim · model-written summary
Increasing SO2 stress decreased leaf proline, malonaldehyde and soluble protein contents.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while proline,malonaldehyde and soluble protein contents decreased.”
t0“Mulberry Trees”
Claim · model-written summary
The authors attributed greater leaf injury to inhibition of protective enzymes by SO2.
- Outcome
- more serious injury,and larger necrotic areas on the leavese0
- Qualifier
- Activity of protective enzyme was inhibited by SO2 stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Activity of protective enzyme was inhibited by SO2 stress which led to more serious injury,and larger necrotic areas on the leaves”
t0“Mulberry Trees”
Claim · model-written summary
The authors stated that these changes adversely affected mulberry growth and development.
Verbatim
e0“All these changes had negative influences on the growth and development of mulberry.”
The same questions in other papers
pollution · nutrient: content · Morus (mulberry trees)Positive and negative results
1 in the opposite direction
- 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.