Abstract
, respectively) was investigated, and the adaptive strategy of seed germination, seedling survival, growth, morphological plasticity, biomass accumulation and allocation under different light intensities was explored in this paper. The results showed that light intensity significantly affected the germination rate, survival rate, establishment rate and germination index. Germination rate reached the maximum under 40% light intensity, while survival rate and establishment rate reached the maximum at 100% light intensity. With the light intensity decreased, the stem length increased, while the root length, cotyledon length, cotyledon thickness and euphylla number declined, and basal stem diameter had no significant difference among diffe-rent light intensities. The total biomass, root biomass, stem biomass and leaf biomass were the highest under 100% light intensity. With the light intensity decreased, the photosynthesis non-photosynthesis biomass ratio and leaf biomass ratio declined, while stem biomass ratio increased, the root to shoot ratio and root biomass ratio had no significant difference among different light intensities. Low light promoted seed germination, but seedlings grew slowly with high mortality under low light. The accumulation of biomass in stem increased the plant tolerance to low light.
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Claims 16
Claim · model-written summary
Light intensity significantly affected germination rate, survival rate, establishment rate and germination index.
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t0“Chinese fir”
e0“light intensity significantly affected the germination rate, survival rate, establishment rate and germination index”
Claim · model-written summary
Germination rate was maximal at 40% light intensity.
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t0“Chinese fir”
e0“Germination rate reached the maximum under 40% light intensity”
Claim · model-written summary
Survival and establishment rates were maximal at 100% light intensity.
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t0“Chinese fir”
e0“survival rate and establishment rate reached the maximum at 100% light intensity”
Claim · model-written summary
Stem length increased as light intensity declined.
Verbatim
t0“Chinese fir”
e0“With the light intensity decreased, the stem length increased”
Claim · model-written summary
Root length, cotyledon length and cotyledon thickness declined as light intensity declined.
Verbatim
t0“Chinese fir”
e0“the root length, cotyledon length, cotyledon thickness and euphylla number declined”
Claim · model-written summary
Euphylla number declined as light intensity declined.
Verbatim
t0“Chinese fir”
e0“euphylla number declined”
Claim · model-written summary
Basal stem diameter did not differ significantly among light intensities.
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t0“Chinese fir”
e0“basal stem diameter had no significant difference among diffe-rent light intensities”
Claim · model-written summary
Total, root and stem biomass were highest under 100% light intensity.
Verbatim
t0“Chinese fir”
e0“The total biomass, root biomass, stem biomass and leaf biomass were the highest under 100% light intensity”
Claim · model-written summary
Leaf biomass was highest under 100% light intensity.
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t0“Chinese fir”
e0“leaf biomass were the highest under 100% light intensity”
Claim · model-written summary
Photosynthesis non-photosynthesis biomass ratio and leaf biomass ratio declined with falling light intensity.
Verbatim
t0“Chinese fir”
e0“With the light intensity decreased, the photosynthesis non-photosynthesis biomass ratio and leaf biomass ratio declined”
Claim · model-written summary
Stem biomass ratio increased with falling light intensity.
Verbatim
t0“Chinese fir”
e0“stem biomass ratio increased”
Claim · model-written summary
Root to shoot ratio and root biomass ratio did not differ significantly among light intensities.
Verbatim
t0“Chinese fir”
e0“the root to shoot ratio and root biomass ratio had no significant difference among different light intensities”
Claim · model-written summary
Low light promoted seed germination.
Verbatim
t0“Chinese fir”
e0“Low light promoted seed germination”
Claim · model-written summary
Seedlings grew slowly under low light.
Verbatim
t0“Chinese fir”
e0“seedlings grew slowly with high mortality under low light”
Claim · model-written summary
Seedling mortality was high under low light.
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t0“Chinese fir”
e0“high mortality under low light”
Claim · model-written summary
The authors attributed greater low-light tolerance to greater stem biomass accumulation.
Verbatim
t0“Chinese fir”
e0“The accumulation of biomass in stem increased the plant tolerance to low light.”