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作 者 ：贺安娜;;林文强;姚奕

期 刊 ：植物研究 2012年 32卷 6期 页码：657-661

关键词：虎耳草；遮荫；光合特性；

Keywords:Saxifrage stolonifera Curt., shading, photosynthetic characteristics,

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（A_max）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(Φ_PSⅡ)、PSⅡ最大量子产量(F_v/F_m)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。

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 (A_max) and the average diurnal variation was the highest without “siesta”, quantum yield of PSII (Φ_PSⅡ), intrinsic photochemical efficiency of PSⅡ(F_v/F_m) 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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