Abstract
This study investigated the photosynthetic response of soybean seedlings under different shading conditions.Simulating the field maize/soybean relay-cropping pattern,two soybean cultivars,Nandou 12andGuixia 3,were utilized to analyze changes in the pigment content,photosynthetic rate and chlorophyll fluorescence parameters at different growth stages under shading and during light recovery stages.Five shading treatments were set;no shading,30% partial shading,50% partial shading,70% partial shading and 50%full shading.Shading increased the pigment content and original fluorescence intensity while the chlorophyll a/b ratio decreased.Photosynthetic rate,maximal photochemical efficiency,photochemical efficiency and photochemical quenching initially increased and then decreased,while non-photochemical quenching initially decreased before increasing.The soybean seedlings grew strongly under 50% partial shading but growth was poor under50%full shading.Shading had a marked effect on seedlings at the four-trifoliolate leaf stage;when shaded,seedlings accommodated the weak light environment by changing the pigment composition or promoting photosynthetic electron transport.Nandou 12showed better shade tolerance and higher photo chemical efficiency than Guixia 3.Guixia 3was unable to dissipate excess light energy under light recovery resulting in severe damage to the photosynthetic system.
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Claims 9
Claim · model-written summary
Shading increased pigment content and original fluorescence intensity.
- Taxon
- soybean
Glycine maxt0 - Treatment
- Shadinge0
- Outcome
- pigment content and original fluorescence intensitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shading increased the pigment content and original fluorescence intensity while the chlorophyll a/b ratio decreased”
t0“soybean”
Claim · model-written summary
Shading decreased chlorophyll a/b ratio.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Shadinge0
- Outcome
- chlorophyll a/b ratioe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shading increased the pigment content and original fluorescence intensity while the chlorophyll a/b ratio decreased”
t0“soybean”
Claim · model-written summary
Photosynthetic and photochemical metrics rose then fell under shading.
- Taxon
- soybeanGlycine maxt0
- Outcome
- Photosynthetic rate,maximal photochemical efficiency,photochemical efficiency and photochemical quenchinge0
- Direction
- initially increased and then decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosynthetic rate,maximal photochemical efficiency,photochemical efficiency and photochemical quenching initially increased and then decreased”
t0“soybean”
Claim · model-written summary
Non-photochemical quenching fell then rose.
- Taxon
- soybeanGlycine maxt0
- Outcome
- non-photochemical quenchinge0
- Direction
- initially decreased before increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“non-photochemical quenching initially decreased before increasing”
t0“soybean”
Claim · model-written summary
Seedlings grew strongly at 50% partial shading.
- Taxon
- soybeanGlycine maxe0
- Treatment
- 50% partial shadinge0
- Outcome
- seedlings grew stronglye0
- Direction
- stronglye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soybean seedlings grew strongly under 50% partial shading but growth was poor under50%full shading”
Claim · model-written summary
Seedling growth was poor at 50% full shading.
- Taxon
- soybeanGlycine maxe0
- Treatment
- 50%full shadinge0
- Outcome
- growthe0
- Direction
- poore0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soybean seedlings grew strongly under 50% partial shading but growth was poor under50%full shading”
Claim · model-written summary
Shading markedly affected four-trifoliolate seedlings.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- four-trifoliolate leaf stagee0
- Outcome
- marked effect on seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shading had a marked effect on seedlings at the four-trifoliolate leaf stage”
t0“soybean”
Claim · model-written summary
Nandou 12 showed better tolerance and photochemical efficiency than Guixia 3.
- Taxon
- soybeanGlycine maxt0
- Material
- Nandou 12e0
- Outcome
- shade tolerance and higher photo chemical efficiencye0
- Direction
- highere0
- Comparator
- Guixia 3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nandou 12showed better shade tolerance and higher photo chemical efficiency than Guixia 3”
t0“soybean”
Claim · model-written summary
Guixia 3 failed to dissipate excess light on recovery and suffered photosynthetic damage.
- Taxon
- soybeanGlycine maxt0
- Material
- Guixia 3e0
- Outcome
- severe damage to the photosynthetic systeme0
- Qualifier
- under light recoverye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Guixia 3was unable to dissipate excess light energy under light recovery resulting in severe damage to the photosynthetic system”
t0“soybean”
The same questions in other papers
shade · growth · Glycine max (soybean)Results differ
25 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
34 papers more in this group
See all 38 papers →shade · physiology: pigments · Glycine max (soybean)Positive and negative results
1 paper in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- no effect
3 papers more in this group
See all 7 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.