Abstract
The hydroponics was adopted in our experiments to research the effects of heavy metal Hg on the growth characteristics, including plant height, tiller, the ratio of root/shoot and the physiological and biochemical characteristics including the content of chlorophyll and free proline and the activity of protective enzyme SOD, POD and CAT. The results showed that at low concentrations of Hg, the height and the ear weight of paddy were promoted but restrained significantly at 10 mg·L-1 and 50 mg·L-1 Hg2+. The tiller number of rice showed no obvious reduction at lower concentration of Hg2+, but reduced significantly at 10 mg·L-1 and 50 mg·L-1 Hg2+ as well as small and weak tillers increased. Under cadium stress, the ratio of root/shoot increased, indicating the restrain effect of cadium on shoot was greater than that of root in rice. There was no significant difference in content of chlorophyll b and pigment of carotenoid between Hg2+ stress and the control, but, with Hg2+ concentration increasing, the content of chlorophyll and biomass dropped obviously. In addition, Hg2+ could induce the protective enzyme activity. Hg2+ showed no significant effect on relative water content of leaves and the content of free proline.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
At low Hg concentrations, rice plant height and ear weight were promoted.
- Taxon
- paddye1
- Treatment
- low concentrations of Hge1
- Outcome
- the height and the ear weighte1
- Direction
- promotede1
Not reportedComparator
Verbatim
e1“at low concentrations of Hg, the height and the ear weight of paddy were promoted”
Claim · model-written summary
At 10 mg/L and 50 mg/L Hg2+, rice height and ear weight were significantly restrained.
- Taxon
- paddye1
- Treatment
- 10 mg·L-1 and 50 mg·L-1 Hg2+e1
- Outcome
- the height and the ear weighte1
- Direction
- restrainede1
Not reportedComparator
Verbatim
e1“the height and the ear weight of paddy were promoted but restrained significantly at 10 mg·L-1 and 50 mg·L-1 Hg2+”
Claim · model-written summary
Rice tiller number showed no obvious reduction at lower Hg2+ concentrations.
- Taxon
- rice
Oryza sativae1 - Treatment
- lower concentration of Hg2+e1
- Outcome
- tiller numbere1
- Direction
- no obvious reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The tiller number of rice showed no obvious reduction at lower concentration of Hg2+”
Claim · model-written summary
Rice tiller number was significantly reduced at 10 mg/L and 50 mg/L Hg2+.
- Taxon
- riceOryza sativae1
- Treatment
- 10 mg·L-1 and 50 mg·L-1 Hg2+e1
- Outcome
- tiller numbere1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The tiller number of rice showed no obvious reduction at lower concentration of Hg2+, but reduced significantly at 10 mg·L-1 and 50 mg·L-1 Hg2+”
Claim · model-written summary
Small and weak tillers increased at 10 mg/L and 50 mg/L Hg2+.
- Taxon
- RiceOryza sativat0
- Treatment
- 10 mg·L-1 and 50 mg·L-1 Hg2+e1
- Outcome
- small and weak tillerse1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e1“reduced significantly at 10 mg·L-1 and 50 mg·L-1 Hg2+ as well as small and weak tillers increased”
Claim · model-written summary
Under cadmium stress (as written), the root/shoot ratio of rice increased.
- Taxon
- RiceOryza sativat0
- Treatment
- cadium stresse1
- Outcome
- the ratio of root/shoote1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e1“Under cadium stress, the ratio of root/shoot increased”
Claim · model-written summary
The authors interpret the increased root/shoot ratio as the restraining effect of the metal on shoot being greater than on root in rice.
- Taxon
- riceOryza sativae1
- Outcome
- restrain effecte1
- Qualifier
- on shoot was greater than that of roote1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“indicating the restrain effect of cadium on shoot was greater than that of root in rice”
Claim · model-written summary
There was no significant difference in chlorophyll b content and carotenoid pigment between Hg2+ stress and the control.
- Taxon
- RiceOryza sativat0
- Treatment
- Hg2+ stresse1
- Outcome
- content of chlorophyll b and pigment of carotenoide1
- Direction
- no significant differencee1
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e1“There was no significant difference in content of chlorophyll b and pigment of carotenoid between Hg2+ stress and the control”
Claim · model-written summary
With increasing Hg2+ concentration, chlorophyll content and biomass dropped obviously.
- Taxon
- RiceOryza sativat0
- Treatment
- Hg2+ concentration increasinge1
- Outcome
- the content of chlorophyll and biomasse1
- Direction
- droppede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e1“with Hg2+ concentration increasing, the content of chlorophyll and biomass dropped obviously”
Claim · model-written summary
Hg2+ induced protective enzyme (SOD, POD, CAT) activity.
- Taxon
- RiceOryza sativat0
- Treatment
- Hg2+e1
- Outcome
- protective enzyme activitye1
- Direction
- inducee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e1“Hg2+ could induce the protective enzyme activity”
Claim · model-written summary
Hg2+ had no significant effect on relative water content of leaves or free proline content.
- Taxon
- RiceOryza sativat0
- Treatment
- Hg2+e1
- Outcome
- relative water content of leaves and the content of free prolinee1
- Direction
- no significant effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Seedlings”
e1“Hg2+ showed no significant effect on relative water content of leaves and the content of free proline”
The same questions in other papers
mercury atom · yield · Oryza sativa (rice)Positive and negative results
1 in the opposite direction
- 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.