Abstract
With two soybean(Glycine max) varieties,Dongbei 85411(DB854-11) and Zhechun No.2(ZC2) as experimental materials,the responses of photosynthetic characteristics in soybean leaves to different manganese(Mn) concentration(0,0.05,0.5,5,30,50 mg/L) were studied.The results showed that minimal fluorescence(Fo),maximum fluorescence(Fm),maximal photochemical efficiency of PSⅡ(Fv/Fm),the potential activities of PSⅡ(Fv/Fo),photochemical quenching(qP) were enhanced with low concentration of Mn,but the Fo,Fm, Fv/Fm,Fv/Fo,qP were reduced with high concentration of Mn.With the increasing of Mn concentration,non-photochemical quenching coefficient(qN) was increased.Appropriate concentration of Mn significantly increased photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs) and decreased stomata resistance(Rs) and intercellular CO2 concentration(Ci).With the increasing of Mn concentration,Pn,Tr and Gs in soybean leaves were reduced,while Rs,Ci increased.Fo reached the maximum value at the concentration of 0.5 mg/L Mn2+,but Fm,qP,Fv/Fm,Fv/Fo was maximum at 5 mg/L Mn2+,which indicated that for the photosynthesis was promoted when the concentration of Mn2+ between 0.5 mg/L and 5 mg/L.Under 50 mg/L Mn2+ treatment,qN,Rs,Ci reached the maximum and Tr,Pn reduced to the minimum. The negative effect on soybean growth was resulted from the dissipation of excess light energy and reduction of photosynthetic rate.There was a genotypic difference between the two varieties of soybean.Zhechun No.2 was more Mn-tolerant than Dongbei 854-11 soybean.
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Claims 12
Claim · model-written summary
Low Mn enhanced Fo, Fm, Fv/Fm, Fv/Fo, and qP.
- Taxon
- soybean
Glycine maxt0 - Treatment
- low concentration of Mne0
- Outcome
- minimal fluorescence(Fo),maximum fluorescence(Fm),maximal photochemical efficiency of PSⅡ(Fv/Fm)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“minimal fluorescence(Fo),maximum fluorescence(Fm),maximal photochemical efficiency of PSⅡ(Fv/Fm),the potential activities of PSⅡ(Fv/Fo),photochemical quenching(qP) were enhanced with low concentration of Mn”
t0“Response of photosynthetic characteristics to Mn nutrition in soybean seedling”
Claim · model-written summary
High Mn reduced Fo, Fm, Fv/Fm, Fv/Fo, and qP.
- Taxon
- soybeanGlycine maxt0
- Treatment
- high concentration of Mne0
- Outcome
- Fo,Fm, Fv/Fm,Fv/Fo,qPe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Fo,Fm, Fv/Fm,Fv/Fo,qP were reduced with high concentration of Mn”
t0“Response of photosynthetic characteristics to Mn nutrition in soybean seedling”
Claim · model-written summary
qN increased with Mn concentration.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Mn concentratione0
- Outcome
- non-photochemical quenching coefficient(qN)e0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the increasing of Mn concentration,non-photochemical quenching coefficient(qN) was increased.”
t0“Response of photosynthetic characteristics to Mn nutrition in soybean seedling”
Claim · model-written summary
Appropriate Mn increased Pn, Tr, and Gs.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Appropriate concentration of Mne0
- Outcome
- photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Appropriate concentration of Mn significantly increased photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs)”
t0“Response of photosynthetic characteristics to Mn nutrition in soybean seedling”
Claim · model-written summary
Appropriate Mn decreased Rs and Ci.
- Taxon
- soybeanGlycine maxt0
- Outcome
- stomata resistance(Rs) and intercellular CO2 concentration(Ci)e0
- Direction
- decreasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased stomata resistance(Rs) and intercellular CO2 concentration(Ci)”
t0“Response of photosynthetic characteristics to Mn nutrition in soybean seedling”
Claim · model-written summary
Increasing Mn reduced Pn, Tr, and Gs.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Mn concentratione0
- Outcome
- Pn,Tr and Gse0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the increasing of Mn concentration,Pn,Tr and Gs in soybean leaves were reduced”
t0“Response of photosynthetic characteristics to Mn nutrition in soybean seedling”
Claim · model-written summary
Increasing Mn increased Rs and Ci.
- Taxon
- soybeanGlycine maxt0
- Outcome
- Rs,Cie0
- Direction
- increasede0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while Rs,Ci increased.”
t0“Response of photosynthetic characteristics to Mn nutrition in soybean seedling”
Claim · model-written summary
Fo peaked at 0.5 mg/L Mn2+.
- Taxon
- soybeanGlycine maxt0
- Outcome
- Foe0
- Direction
- maximume0
- Value
- 0.5 mg/L Mn2+e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fo reached the maximum value at the concentration of 0.5 mg/L Mn2+”
t0“Response of photosynthetic characteristics to Mn nutrition in soybean seedling”
Claim · model-written summary
Fm, qP, Fv/Fm, and Fv/Fo peaked at 5 mg/L Mn2+.
- Taxon
- soybeanGlycine maxt0
- Outcome
- Fm,qP,Fv/Fm,Fv/Foe0
- Direction
- maximume0
- Value
- 5 mg/L Mn2+e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fm,qP,Fv/Fm,Fv/Fo was maximum at 5 mg/L Mn2+”
t0“Response of photosynthetic characteristics to Mn nutrition in soybean seedling”
Claim · model-written summary
At 50 mg/L Mn2+, qN, Rs, and Ci peaked.
- Taxon
- soybeanGlycine maxt0
- Treatment
- 50 mg/L Mn2+ treatmente0
- Outcome
- qN,Rs,Cie0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under 50 mg/L Mn2+ treatment,qN,Rs,Ci reached the maximum”
t0“Response of photosynthetic characteristics to Mn nutrition in soybean seedling”
Claim · model-written summary
At 50 mg/L Mn2+, Tr and Pn reached minima.
- Taxon
- soybeanGlycine maxt0
- Outcome
- Tr,Pne0
- Direction
- reducede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tr,Pn reduced to the minimum”
t0“Response of photosynthetic characteristics to Mn nutrition in soybean seedling”
Claim · model-written summary
Zhechun No.2 was more Mn tolerant than Dongbei 854-11.
- Taxon
- soybeanGlycine maxt0
- Material
- Zhechun No.2e0
- Outcome
- Mn-tolerante0
- Direction
- moree0
- Comparator
- Dongbei 854-11e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zhechun No.2 was more Mn-tolerant than Dongbei 854-11 soybean.”
t0“Response of photosynthetic characteristics to Mn nutrition in soybean seedling”
The same questions in other papers
manganese atom · physiology: photosynthesis · Glycine max (soybean)Results agree
4 papers in the same direction as this paper
- positive
- positive
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See all 5 papers →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.