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7种彩叶树种光合特性分析

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为了更好地了解北方常见彩叶树种的生态特性,采用LI-6400便携式光合仪测定了自然生长状态下7种彩叶树种的净光合速率(Pn)、气孔导度(Gs)、细胞间二氧化碳浓度(Ci)、蒸腾速率(Tr)等光合特征,结果表明,7种彩叶树种最大净光合速率从大到小依次为彩叶豆梨、秋紫白蜡、金叶接骨木、全红杨、紫叶稠李、金叶风箱果、紫叶风箱果,其中,彩叶豆梨的最大净光合速率最高,为14.93 μmol/(m2·s),紫叶风箱果的最大净光合速率最低,为8.65 μmol/(m2·s);紫叶风箱果、彩叶豆梨的净光合速率与气孔导度之间呈现显著正相关的关系,相关系数分别为0.910、0.893;紫叶风箱果、金叶风箱果、紫叶稠李、彩叶豆梨的净光和速率与有效辐射呈显著正相关,相关系数分别为0.887、0.920、0.946和0.959;其中彩叶豆梨、紫叶稠李、全红杨、秋紫白蜡、金叶接骨木的光饱和点分别为1 166 μmol/(m2·s)、1 010 μmol/(m2·s)、836 μmol/(m2·s)、1 136μmol/(m2·s)、1 456 μmol/(m2·s),紫叶风箱果、金叶风箱果的光饱和点均较低,分别为508 μmol/(m2·s)和424 μmol/(m2·s),较高的光饱和点使植物更好地适应当地中午高光条件,较低的光饱和点与光补偿点使植物表现出耐阴的特点.
Analysis of photosynthetic characteristics of seven colored-leafed trees
To have a better knowledge of common colorful-leafed plants in north of China and to explore their ecological characteristics,we measured photosynthetic rate (Pn),stomatal conductance (Gs),intercellular CO2 concentration (Ci) and transpiration rate (Tr) of seven color-leafed plants under natural conditions by using Li-6400 portable photosynthesis analyzer system.The result shows the decreasing order of maximum photosynthetic capacity of seven colorful plants is:Pyrus ussuriensis'Hongye',Fraxinus chinensis'Autumu Purple',Sambucus williamsii'Plumosa Aurea',Populus deltoides'Quanhong',Prunus virginiana 'Red Select Shurb',Physocarpus oplifolius'Darts Gold',and Physocarpus oplifolius 'Diabolo'.Pyrus ussuriensis'Hongye'has the highest maximum net photosynthetic rate among these seven plants,which is 14.93 μmol/(m2 · s),and the lowest maximum net photosynthetic rate is Physocarpus oplifolius'Diabolo',which is 8.65μmol/(m2 · s).Photosynthetic rate have significant positive correlation with stomatal conductance.The correlation coefficient between Pn and Gs of Physocarpus oplifolius'Diabolo'and Pyrus ussuriensis'Hongye'are 0.910 and 0.893 respectively.Pn also has significant positive correlation with photosynthetic active radiation.The correlation coefficient between photosynthetic active radiation and the rate of net photosynthesis of Physocarpus oplifolius'Diabolo',Physocarpus oplifolius'Darts Gold',Prunus virginiana'Red Select Shurb'and Pyrus ussuriensis'Hongye'are 0.887,0.920,0.946,0.959 respectively.The light saturated point of Pyrus ussuriensis'Hongye',Prunus virginiana'Red Select Shurb',Populus deltoides 'Quanhong',Fraxinus chinensis'Autumu Purple',and Sambucus williamsii'Plumosa Aurea'are 1 166 μmol/(m2 · s),1010μmol/(m2 · s),836 μmol/(m2 · s),1 136 μmol/(m2 · s),and 1 456 μmol/(m2 · s) respectively.The relatively higher light saturation point can help plants to adapt to the high light intensity at noon.Both Physocarpus oplifolius'Diabolo'and Physocarpus oplifolius'Darts Gold'have low light saturation point,which are 508 μmol/(m2 · s)and 424 μmol/(m2 · s) respectively.The low light saturation point and light compensation point make plants to present the shade-tolerance characteristics

color-leafed plantphotosynthetic characteristiclight compensation pointlight saturation pointdiurnal variation

王少杰、付宇辰、冷平生、李迎春、赵爽、胡增辉

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北京农学院园林学院,城乡生态环境北京实验室,北京 102206

北京市黄垡苗圃,北京 102601

彩叶植物 光合特性 光补偿点 光饱和点 日变化

北京市属高等学校创新团队建设与教师职业发展计划项目北京林果业生态环境功能提升协同创新中心项目

IDHT20150503CEFF-PXM2016-014207-000038

2017

10.13320/j.cnki.hjfor.2017.0049

林业与生态科学
河北农业大学

林业与生态科学

影响因子：0.299
ISSN：2096-4749
年,卷(期)：2017.32(3)
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