Abstract
BACKGROUND AND AIMS: Plasticity of leaf growth and photosynthesis is an important strategy of plants to adapt to shading stress; however, their strategy of leaf development to achieve a simultaneous increase in leaf area and photosynthesis under shading remains unknown. METHODS: In the present study, a pot experiment was conducted using three rapeseed genotypes of Huayouza 50 (HYZ50), Zhongshuang 11 (ZS11) and Huayouza 62 (HYZ62), and the responses of plant growth, leaf morphoanatomical traits, cell wall composition and photosynthesis to shading were investigated. KEY RESULTS: Shading significantly increased leaf area per plant (LAplant) in all genotypes, but the increase in HYZ62 was greater than that in HYZ50 and ZS11. The greater increment of LAplant in HYZ62 was related to the larger decrease in leaf mass per area (LMA) and leaf density (LD), which were in turn related to less densely packed mesophyll cells and thinner cell walls (Tcw). Moreover, shading significantly increased photosynthesis in HYZ62 but significantly decreased it in HYZ50. The enhanced photosynthesis in HYZ62 was related to increased mesophyll conductance (gm) due primarily to thinner cell walls. CONCLUSIONS: The data presented indicate that the different plasticity of mesophyll cell density, cell wall thickness and cell wall composition in response to shading can dramatically affect leaf growth and photosynthesis.
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Claims 9
Claim · model-written summary
Shading significantly increased leaf area per plant in all rapeseed genotypes.
- Taxon
- rapeseedt0
- Material
- all genotypese0
- Treatment
- Shadinge0
- Outcome
- leaf area per plant (LAplant)e0
- Direction
- increasede0
Not reportedComparator
Verbatim
t0“rapeseed”
e0“Shading significantly increased leaf area per plant (LAplant) in all genotypes, but the increase in HYZ62 was greater than that in HYZ50 and ZS11”
Claim · model-written summary
The increase in leaf area per plant under shading was greater in HYZ62 than in HYZ50 and ZS11.
Verbatim
t0“rapeseed”
e0“Shading significantly increased leaf area per plant (LAplant) in all genotypes, but the increase in HYZ62 was greater than that in HYZ50 and ZS11”
Claim · model-written summary
The larger decrease in leaf mass per area and leaf density in HYZ62 was related to its greater increase in leaf area per plant.
Verbatim
t0“rapeseed”
e1“The greater increment of LAplant in HYZ62 was related to the larger decrease in leaf mass per area (LMA) and leaf density (LD), which were in turn related to less densely packed mesophyll cells and thinner cell walls (Tcw)”
Claim · model-written summary
HYZ62 leaves had less densely packed mesophyll cells.
Verbatim
t0“rapeseed”
e1“The greater increment of LAplant in HYZ62 was related to the larger decrease in leaf mass per area (LMA) and leaf density (LD), which were in turn related to less densely packed mesophyll cells and thinner cell walls (Tcw)”
Claim · model-written summary
HYZ62 leaves had thinner cell walls.
Verbatim
t0“rapeseed”
e1“The greater increment of LAplant in HYZ62 was related to the larger decrease in leaf mass per area (LMA) and leaf density (LD), which were in turn related to less densely packed mesophyll cells and thinner cell walls (Tcw)”
Claim · model-written summary
Shading significantly increased photosynthesis in HYZ62.
Not reportedComparator
Verbatim
t0“rapeseed”
e2“shading significantly increased photosynthesis in HYZ62 but significantly decreased it in HYZ50”
Claim · model-written summary
Shading significantly decreased photosynthesis in HYZ50.
Not reportedComparator
Verbatim
t0“rapeseed”
e2“shading significantly increased photosynthesis in HYZ62 but significantly decreased it in HYZ50”
Claim · model-written summary
Mesophyll conductance increased in HYZ62, related to thinner cell walls and enhanced photosynthesis.
Verbatim
t0“rapeseed”
e3“The enhanced photosynthesis in HYZ62 was related to increased mesophyll conductance (gm) due primarily to thinner cell walls”
Claim · model-written summary
Different plasticity of mesophyll cell density and cell wall traits in response to shading can strongly affect leaf growth and photosynthesis in rapeseed.
Verbatim
t0“rapeseed”
e4“The data presented indicate that the different plasticity of mesophyll cell density, cell wall thickness and cell wall composition in response to shading can dramatically affect leaf growth and photosynthesis”
The same questions in other papers
shade · growth · Brassica napus (oilseed rape)Positive and negative results
2 in the opposite direction
- negative
- negative
shade · physiology: photosynthesis · Brassica napus (oilseed rape)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
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.