| 遮荫对虎耳草光合生理特性的影响 |
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| 引用本文： | 贺安娜；林文强；姚奕. 遮荫对虎耳草光合生理特性的影响[J]. 植物研究, 2012, 32(6): 657-661 |
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| 作者姓名： | 贺安娜；林文强；姚奕 |
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| 作者单位： | 1.怀化学院生命科学系，怀化 418008；;2.民族药用植物资源研究与利用湖南省重点实验室，怀化 418008；;3.湘西药用植物与民族植物学湖南省高校重点实验室，怀化 418008 |
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| 基金项目： | 植物学湖南省重点建设学科支助 |
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| 摘 要： | 以盆栽1年的虎耳草为材料,研究遮荫条件下虎耳草叶片抗氧化酶体系活力、叶绿素含量、光合速率以及叶绿素荧光参数的变化，为虎耳草规模化栽培提供理论基础。结果表明：透光率50%条件下，叶绿素含量较高；虎耳草抗氧化酶活力最高；光饱和点（LSP）最大，最大光合速率（Amax）最高，光合速率日变化平均值最高，无“午休”；光系统Ⅱ的实际量子产量(ΦPSⅡ)、PSⅡ最大量子产量(Fv/Fm)和光化学猝灭系数(qP)最高，非光化学猝灭系数(qN)最低。这表明，虎耳草在怀化地区的最适光照条件是50%左右的透光率。
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| 关 键 词： | 虎耳草；遮荫；光合特性 |
Effect of Shading on the Photosynthetic Characteristics of Saxifrage stolonifera Curt. |
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| HE An-Na,LIN Wen-Qiang,YAO Yi. Effect of Shading on the Photosynthetic Characteristics of Saxifrage stolonifera Curt.[J]. Bulletin of Botanical Research, 2012, 32(6): 657-661 |
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| Authors: | HE An-Na LIN Wen-Qiang YAO Yi |
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| Affiliation: | 1(1.Department of Life Science,Huaihua University,Huaihua 418008;2.Key Laboratory of Research and Utilization of Ethnomedicinal Plant Resources of Hunan Province,Huaihua 418008;3.Key Laboratory of Xiangxi Medicinal Plant and Ethnobotany of Hunan Higher Education,Huaihua 418008) |
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| Abstract: | The effects of shading on the activity of antioxidant enzymes, chlorophyll content, photosynthetic physiology and chlorophyll fluorescence of Saxifrage stolonifera were study to provide a theoretical basis for large-scale cultivation of S.stolonifera. The results showed that, the contents of chlorophyll were enhanced, activity of antioxidant enzymes was the highest, light saturation point (LSP), maximum net photosynthetic rate (Amax) and the average diurnal variation was the highest without “siesta”, quantum yield of PSII (ΦPSⅡ), intrinsic photochemical efficiency of PSⅡ(Fv/Fm) and photochemical quenching coefficient (qP) were enhanced, non-photochemical quenching (qN) was minimum in 50% light transmittance condition. This indicates the optimum light condition of S.stolonifera in the region of Huaihua is the transmittance of about 50%. |
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| Keywords: | Saxifrage stolonifera Curt. shading photosynthetic characteristics |
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