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Bulletin of Botanical Research ›› 2012, Vol. 32 ›› Issue (6): 657-661.doi: 10.7525/j.issn.1673-5102.2012.06.004

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Effect of Shading on the Photosynthetic Characteristics of Saxifrage stolonifera Curt.

HE An-Na;;LIN Wen-Qiang;YAO Yi   

  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
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-11-20 Published:2012-11-20
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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%.

Key words: Saxifrage stolonifera Curt., shading, photosynthetic characteristics

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