Abstract
[Objective] The effects of heavy metals stress on growth and physiological indicators were studied.[Method]The liquid culture of lead(Pb),zinc(Zn) combined stress on Taiwan Paulownia growth and physiological indices.[Result]Pb,Zn composite stress Taiwan Paulownia growth index decreased with increasing concentration;different concentrations of Pb,Zn combined stress,plants photosynthetic pigment content decreased chlorophyll a significant downward trend in 100 mol / L Pb and 200 mol / L Zn the lowest combined stress compared with the control(CK) decreased by 60%;Taiwan Paulownia MDA stem leaf root,was down then up trend;ground and underground parts of proline(Pro) content 100 mol / L Pb stress were the highest increase of 24% compared with CK,1.2-fold,with the attendant decline significantly;roots glutathione changes more significant;stem and leaf ascorbic acid content of Pb,Zn composite stress upward trend compared with CK,the roots defense reactive oxygen toxicity diminished capacity.[Conclusion]Increasing concentrations of Pb,Zn increased damage to Taiwan Paulownia,serionsly affect the growth of plants.
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Claims 8
Claim · model-written summary
Growth indices decreased as combined Pb and Zn concentration increased.
Verbatim
e0“Pb,Zn composite stress Taiwan Paulownia growth index decreased with increasing concentration”
t0“Taiwan Paulownia”
Claim · model-written summary
Combined Pb and Zn stress decreased photosynthetic pigment content.
- Taxon
- Taiwan Paulowniat0
- Treatment
- Pb,Zn combined stresse0
- Outcome
- photosynthetic pigment contente0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“different concentrations of Pb,Zn combined stress,plants photosynthetic pigment content decreased”
t0“Taiwan Paulownia”
Claim · model-written summary
Chlorophyll a was 60% lower at 100 mol / L Pb plus 200 mol / L Zn than control.
Verbatim
e0“chlorophyll a significant downward trend in 100 mol / L Pb and 200 mol / L Zn the lowest combined stress compared with the control(CK) decreased by 60%”
t0“Taiwan Paulownia”
Claim · model-written summary
MDA in stem, leaf and root declined and then rose under stress.
Verbatim
e0“Taiwan Paulownia MDA stem leaf root,was down then up trend”
t0“Taiwan Paulownia”
Claim · model-written summary
Proline in aboveground and underground parts peaked at 100 mol / L Pb stress.
Verbatim
e0“ground and underground parts of proline(Pro) content 100 mol / L Pb stress were the highest increase of 24% compared with CK,1.2-fold”
t0“Taiwan Paulownia”
Claim · model-written summary
Root glutathione showed more significant changes.
Verbatim
e0“roots glutathione changes more significant”
t0“Taiwan Paulownia”
Claim · model-written summary
Stem and leaf ascorbic acid content rose under combined Pb and Zn stress compared with control.
Verbatim
e0“stem and leaf ascorbic acid content of Pb,Zn composite stress upward trend compared with CK”
t0“Taiwan Paulownia”
Claim · model-written summary
Root capacity to defend against reactive oxygen toxicity diminished.
Verbatim
e0“the roots defense reactive oxygen toxicity diminished capacity”
t0“Taiwan Paulownia”