Abstract
Pot experiment was conducted to study the effect of lead stress on stomatal conductance (Cs), intercellar CO2 concentration (Ci), transpiration rate (Tr), net photosynthetic rate (Pn), chlorophyll (Chl) content and yields of maize with different lead concentration.The results showed as followed: ①Different photosynthetic physiological index had different responses to lead. With increasing concentration of Pb, Pn, Cs, Tr and Chl decreased gradually, on the contrary, Ci increased. The values of photosynthetic physiological indexes of the treatments were lower than the control, except lower lead concentration treatment. ②The yields of maize were affected by the lead stress. According to the result, the declination in the kernels yield under lead stress was mainly resulted in the reduction of kernel numbers per ear, further analysis indicated that the various increase of bald tip and grain numbers per row caused the increase or reduction of kernel numbers per ear and grain weight, which result in decrease or increase of grain yield in the end.
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Claims 7
Claim · model-written summary
Increasing Pb decreased maize net photosynthetic rate, stomatal conductance and transpiration rate.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing concentration of Pb, Pn, Cs, Tr and Chl decreased gradually”
t0“Maize”
Claim · model-written summary
Increasing Pb decreased maize chlorophyll content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing concentration of Pb, Pn, Cs, Tr and Chl decreased gradually”
t0“Maize”
Claim · model-written summary
Increasing Pb increased maize intercellular CO2 concentration.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the contrary, Ci increased.”
t0“Effect of Lead Stress on the Photosynthetic Characteristics and Yield of Maize”
Claim · model-written summary
Most lead treatments had lower photosynthetic index values than control, except at low concentration.
- Treatment
- treatmentse0
- Outcome
- photosynthetic physiological indexese0
- Direction
- lowere0
- Qualifier
- except lower lead concentration treatmente0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The values of photosynthetic physiological indexes of the treatments were lower than the control, except lower lead concentration treatment.”
t0“Maize”
Claim · model-written summary
Lead stress reduced maize kernel yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the declination in the kernels yield under lead stress was mainly resulted in the reduction of kernel numbers per ear”
t0“Maize”
Claim · model-written summary
Lead stress reduced kernel number per ear.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reduction of kernel numbers per ear”
t0“Effect of Lead Stress on the Photosynthetic Characteristics and Yield of Maize”
Claim · model-written summary
Changes in bald tip and grains per row were associated with changes in kernels per ear and grain weight.
- Organ / stage
- bald tip and grain numbers per rowe0
- Outcome
- kernel numbers per ear and grain weighte0
- Direction
- increase or reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the various increase of bald tip and grain numbers per row caused the increase or reduction of kernel numbers per ear and grain weight”
t0“Maize”
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