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李彪,黄永韬,黄永芳,龚海光
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广东省林业厅,华南农业大学林学院,华南农业大学林学院,华南农业大学林学院
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摘要: |
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以烈香茶花为材料，研究遮阴对烈香茶花光合作用参数日变化的影响。结果表明：遮阴没有改变烈香茶花光合作用参数日变化趋势。净光合速率日变化呈现双峰，并出现午休现象；蒸腾速率与气孔导度的日变化呈现相同趋势,为单峰曲线；而胞间CO2浓度日变化趋势呈现W型趋势。不同处理下的烈香茶花最大净光合速率分别为3.77（全光照）,3.18（40%光照）,3.08 μmol CO2?m- 2?s-1（80%光照）。
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关键词:
遮阴；烈香茶花；光合作用；参数；日变化
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DOI：
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分类号：
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基金项目：广东省林业科技创新专项（2011KJCX01401)，广东省科技计划项目（2011B020302003） |
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Effects of Shades on Diurnal Variation of Photosynthesis Parameters of Camellia japonica ‘Liexiang’ |
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Li Biao,,Huang Yong-fang and
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College of Forestry，South China Agricultural University,
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Abstract: |
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In this paper，the shading effects on photosynthetic parameters of Camellia japonica‘Liexiang’ were investigated. The results show that shading didn′t influence photosynthetic parameters. The net photosynthetic rate presents doublepeak curves and midday depression; both transpiration rate and stomatal conductance present single peak curves; and intercellular CO2 concentration appears to vary with a W shaped curve. The peak photosynthetic rate of full illumination,40% illumination and 80% illumination was 3.77,3.18 and 3.08μmol CO2·m- 2·s- 1, respectively. The double peak photosynthetic rate curves show that the photosynthetic rate of 80% illumination was lower than 40% illumination at noon. Therefore, an appropriate shading treatment was good for growth of Camellia japonica‘Liexiang’ during hot spell summer.
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Key words:
shades; Camellia japonica‘Liexiang’; photosynthesis; parameters; diurnal variation
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