Abstract
Seedlings of Festuca arundinacea were treated with different concentrations of Pb~(2+)(0,500,1000,1500mg/L Pb(NO_3)_2) under hydroponic condition and after treated for 7 days,its growth,NO~-_3,K~+,Ca~(2+),Na~+,Mg~(2+),Mn~(2+) content and Pb~(2+) accumulation were studied.The results showed that in comparison with the control,lead treatments caused decrease of fresh weight,dry weight,water content and the root activity,and increase of the membrane permeability.Under the conditions of lead stress,MDA content first decreased and then increased,the concentrations of NO~-_3,K~+ and Ca~(2+) in roots and leaves decreased and the concentrations of Na~+,Mg~(2+) and Mn~(2+) in root first increased and then decreased.There was no significant change for the concentrations of Na~+,Mg~(2+) and Mn~(2+) in leaves as compared with controls.Lead treatments resulted in obvious increase of Pb~(2+) concentrations in roots and leave.As the Pb~(2+) absorbed by roots,the amount of Pb~(2+) accumulated in plant leaves increased rapidly and then decreased.Pb~(2+) accumulation ratio of leaves to roots was 55.74% under Pb~(2+) 1000mg/L treatment.The results indicated that Pb~(2+) accumulation caused the decline of root activity,water loss, the deficiency of nitrogen nutrition and the increase of cell membrane peroxidation,and it also disturbed the inorganic ion homostasis in F.arundinacea.The injury brought by Pb~(2+) inhibited F.arundinacea seedlings growth and the inhibition effect was aggravated as Pb~(2+) concentrations increased.The results suggested that from the phytoremediation point of view,F.arundinacea had a great potential for remediation of lead contaminated soils.
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Claims 14
Claim · model-written summary
Lead decreased fresh weight, dry weight and water content.
- Taxon
- Festuca arundinacea
Lolium arundinaceumt0 - Treatment
- lead treatmentse0
- Outcome
- fresh weight,dry weight,water contente0
- Direction
- decreasee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in comparison with the control,lead treatments caused decrease of fresh weight,dry weight,water content and the root activity,and increase of the membrane permeability”
t0“Festuca arundinacea”
Claim · model-written summary
Lead decreased root activity.
- Taxon
- Festuca arundinaceaLolium arundinaceumt0
- Treatment
- lead treatmentse0
- Outcome
- root activitye0
- Direction
- decreasee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in comparison with the control,lead treatments caused decrease of fresh weight,dry weight,water content and the root activity,and increase of the membrane permeability”
t0“Festuca arundinacea”
Claim · model-written summary
Lead increased membrane permeability.
- Taxon
- Festuca arundinaceaLolium arundinaceumt0
- Treatment
- lead treatmentse0
- Outcome
- membrane permeabilitye0
- Direction
- increasee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in comparison with the control,lead treatments caused decrease of fresh weight,dry weight,water content and the root activity,and increase of the membrane permeability”
t0“Festuca arundinacea”
Claim · model-written summary
Under lead stress, MDA first decreased then increased.
- Taxon
- Festuca arundinaceaLolium arundinaceumt0
- Treatment
- lead stresse0
- Outcome
- MDA contente0
- Direction
- first decreased and then increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the conditions of lead stress,MDA content first decreased and then increased”
t0“Festuca arundinacea”
Claim · model-written summary
Lead reduced root and leaf concentrations of nitrate, potassium and calcium.
- Taxon
- Festuca arundinaceaLolium arundinaceumt0
- Treatment
- lead stresse1
- Outcome
- concentrations of NO~-_3,K~+ and Ca~(2+) in roots and leavese0
- Direction
- decreasede0
- Comparator
- controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the concentrations of NO~-_3,K~+ and Ca~(2+) in roots and leaves decreased”
e1“lead stress”
e2“as compared with controls”
t0“Festuca arundinacea”
Claim · model-written summary
Root sodium, magnesium and manganese concentrations first rose then fell under lead stress.
- Taxon
- Festuca arundinaceaLolium arundinaceumt0
- Treatment
- lead stresse1
- Outcome
- concentrations of Na~+,Mg~(2+) and Mn~(2+) in roote0
- Direction
- first increased and then decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the concentrations of Na~+,Mg~(2+) and Mn~(2+) in root first increased and then decreased”
e1“lead stress”
t0“Festuca arundinacea”
Claim · model-written summary
Leaf sodium, magnesium and manganese concentrations did not change significantly against controls.
- Taxon
- Festuca arundinaceaLolium arundinaceumt0
- Treatment
- Lead treatmentse1
- Outcome
- concentrations of Na~+,Mg~(2+) and Mn~(2+) in leavese0
- Direction
- no significant changee0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant change for the concentrations of Na~+,Mg~(2+) and Mn~(2+) in leaves as compared with controls”
e1“Lead treatments”
t0“Festuca arundinacea”
Claim · model-written summary
Lead treatments increased root and leaf lead concentrations.
- Taxon
- Festuca arundinaceaLolium arundinaceumt0
- Treatment
- Lead treatmentse0
- Outcome
- Pb~(2+) concentrations in roots and leavee0
- Direction
- increasee0
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lead treatments resulted in obvious increase of Pb~(2+) concentrations in roots and leave”
e1“the control”
t0“Festuca arundinacea”
Claim · model-written summary
Leaf lead accumulation rose rapidly then fell as roots absorbed lead.
- Taxon
- Festuca arundinaceaLolium arundinaceumt0
- Outcome
- amount of Pb~(2+) accumulated in plant leavese0
- Direction
- increased rapidly and then decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the Pb~(2+) absorbed by roots,the amount of Pb~(2+) accumulated in plant leaves increased rapidly and then decreased”
t0“Festuca arundinacea”
Claim · model-written summary
At 1000mg/L lead, leaf to root lead accumulation ratio was 55.74%.
- Taxon
- Festuca arundinaceaLolium arundinaceumt0
- Treatment
- Pb~(2+) 1000mg/L treatmente0
- Outcome
- Pb~(2+) accumulation ratio of leaves to rootse0
- Value
- 55.74%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pb~(2+) accumulation ratio of leaves to roots was 55.74% under Pb~(2+) 1000mg/L treatment”
t0“Festuca arundinacea”
Claim · model-written summary
The authors attributed declining root activity, water loss, nitrogen deficiency and membrane peroxidation to lead accumulation.
- Taxon
- Festuca arundinaceaLolium arundinaceumt0
- Treatment
- Pb~(2+) accumulatione0
- Outcome
- decline of root activity,water loss, the deficiency of nitrogen nutrition and the increase of cell membrane peroxidatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pb~(2+) accumulation caused the decline of root activity,water loss, the deficiency of nitrogen nutrition and the increase of cell membrane peroxidation”
t0“Festuca arundinacea”
Claim · model-written summary
The authors attributed disrupted inorganic ion homeostasis to lead accumulation.
- Taxon
- F.arundinaceaLolium arundinaceume0
- Treatment
- Pb~(2+) accumulatione0
- Outcome
- inorganic ion homostasise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pb~(2+) accumulation caused the decline of root activity,water loss, the deficiency of nitrogen nutrition and the increase of cell membrane peroxidation,and it also disturbed the inorganic ion homostasis in F.arundinacea”
Claim · model-written summary
Lead injury inhibited seedling growth more as lead concentration increased.
- Taxon
- F.arundinaceaLolium arundinaceume0
- Treatment
- Pb~(2+) concentrationse0
- Outcome
- seedlings growthe0
- Direction
- inhibitede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The injury brought by Pb~(2+) inhibited F.arundinacea seedlings growth and the inhibition effect was aggravated as Pb~(2+) concentrations increased”
Claim · model-written summary
The authors suggested the grass has strong potential to remediate lead-contaminated soil.
- Taxon
- F.arundinaceaLolium arundinaceume0
- Outcome
- remediation of lead contaminated soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“F.arundinacea had a great potential for remediation of lead contaminated soils”
The same questions in other papers
lead atom · nutrient: content · Lolium arundinaceum (tall fescue)Positive and negative results
1 in the opposite direction
- positive
lead atom · growth · Lolium arundinaceum (tall fescue)Results agree
1 paper in the same direction as this paper
- negative
heavy metal · molecular: metabolites · Lolium arundinaceum (tall fescue)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.