| 陈功楷，康华靖.鲜食型和菜用型甘薯叶片对光强及CO2浓度的响应[J].广东农业科学,2013,40(17):27-30 |
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鲜食型和菜用型甘薯叶片对光强及CO2浓度的响应 |
| Photosynthesis response of the potato leaves of root-vegetable type and leaf-vegetable type to light and CO2 concentration |
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| DOI： |
| 中文关键词: 甘薯 鲜食型 菜用型 光合 光强 CO2 |
| 英文关键词: sweet potato root-vegetable style leaf-vegetable style photosynthesis light CO2 |
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| 中文摘要: |
| 以鲜食型和菜用型甘薯为研究对象，应用Licor-6400 便携式光合作用测定仪对其叶片光合参数、光响应曲线和CO2响应曲线进行了测量。结果表明，鲜食型甘薯（红红1号和浙薯13）叶片的最大净光合速率、光饱和点、光补充点以及暗呼吸速率均高于菜用型甘薯（浙菜薯726 和薯绿1 号）。在饱和光强条件下，鲜食型甘薯的最大羧化速率也高于菜用型甘薯品种，其最大羧化速率分别为34.168 μmol/m2.s（红红1号）、44.448 μmol/m2.s（浙薯13)、27.244 μmol/m2.s（浙菜薯726）和30.617 μmol/m2.s（薯绿1 号）；不同品种间的CO2饱和点（CCP）、CO2补充点（CSP)和初始羧化速率(CU)则差异较小；鲜食型甘薯叶片的蒸腾速率和气孔导度均显著高于菜用型甘薯，而水分利用效率和气孔限制值则以菜用型甘薯薯绿1号最高。 |
| 英文摘要: |
| Photosynthesis response of the potato leaves of root-vegetable type and leaf-vegetable type to light and CO2 concentration, using a gas analyzer Li-6400, were measured. The results showed that the maximum photosynthetic rate (Pmax), light saturation point (LSP),light compensation point (LCP) and the respiration rate in the light (Rn) of root-vegetable type were all higher than that of leaf-vegetable type. As the same, the maximum carboxylation rate of root-vegetable type was also higher than that of leaf-vegetable type. The rate was 34.168(Honghong No.1)，44.448 (Zheshu 13)，27.244(Zhecaishu 726) and 30.617(Shulu No. 1) μmol/m2.s, respectively. The transpiration and stomatal conductance of root-vegetable type were also higher than that of leaf-vegetable type. While water use efficiency and stomata limitation value were highest in Shulu No. 1。 |
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