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Position: Home > Articles > Photosynthetic characteristics of three Coreopsis species Journal of Zhejiang A&F University 2012,29 (5) 755-761

3种金鸡菊的光合特性比较

作  者:
郭运雪;蒋文伟;戴锋;黄建荣
单  位:
浙江农林大学风景园林与建筑学院;上房园艺有限公司
关键词:
园艺学;金鸡菊;光合日变化;光响应;环境因子;水分利用效率
摘  要:
以3种金鸡菊属Coreopsis植物1年生扦插苗为研究对象,在室外自然条件下,运用美国产的Li-6400光合系统测定仪对其光合作用日变化和光响应进行了测定。结果表明:3种金鸡菊的光补偿点和光饱和点各不相同。对光的适应范围大小为重瓣金鸡菊Coreopsis lanceolata>大花金鸡菊Coreopsis grandiflora>天堂之门金鸡菊Coreopsisrosea;对强光的利用能力大小为重瓣金鸡菊>天堂之门金鸡菊>大花金鸡菊。3种金鸡菊属植物的净光合速率(Pn)日变化都呈双峰型曲线,第1峰值均大于第2峰值,有明显的光合午休现象,蒸腾速率(Tr)和气孔导度(Cond)变化趋势与净光合速率相似,胞间二氧化碳摩尔分数(Ci)变化趋势则与其相反。3种金鸡菊属植物的水分利用效率(EWUE)差异显著,大小依次为大花金鸡菊>重瓣金鸡菊>天堂之门金鸡菊。图4表1参24
译  名:
Photosynthetic characteristics of three Coreopsis species
作  者:
GUO Yun-xue1,JIANG Wen-wei1,DAI Feng1,HUANG Jian-rong2(1.School of Landscape Architecture,Zhejiang A & F University,Lin'an 311300,Zhejiang,China;2.Shangfang Horticulture Company Limited,Shanghai 201114,China)
关键词:
horticulture;Coreopsis;diurnal variation of photosynthesis;response to light intensity;environmental factors;water-use efficiency
摘  要:
To determine diurnal variation of photosynthetic characteristics and light intensity responses for Coreopsis grandiflora,Coreopsis lanceolata,and Coreopsis rosea an Li-6400 photosynthetic system analyzer was used under natural light conditions.Results indicated different light compensation and light saturation points.The light adaptive range sequence was C.lanceolata > C.grandiflora > C.rosea,and the ability to use relatively strong light was C.lanceolata > C.rosea > C.grandiflora.In addition,diurnal variation in the net photosynthetic rate(Pn) for all three species displayed double-peaked curves with a greater initial peak and a clear photosynthetic noon break.Compared to Pn,the transpiration rate(Tr) and stomatal conductance(Cond) showed similar changes;however,changes in intercellular carbon dioxide concentration(Ci) were reversed.Also,water use efficiency(EWUE) for the three Coreopsis species differed with C.grandiflora > C.lanceolata > C.rosea,which provide the basis for water management of Coreopsis species.[Ch,4 fig.1 tab.24 ref.]

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