两种生态型马齿苋的光合生理特性研究  

Study on the Photosynthetic Physiological Characteristics of Two Ecotypes of Portulaca oleracea

作　　者：张边江[1] 唐宁[1] 陈全战[1] 杨平[1] 

机构地区：[1]南京晓庄学院生物化工与环境工程学院,江苏南京211171

出　　处：《北方园艺》2013年第21期89-91,共3页Northern Horticulture

基　　金：南京晓庄学院生物学重点学科资助项目(XZZDXK201203);江苏省教育厅高校自然基金资助项目(08KJD180012)

摘　　要：以2种生态型马齿苋为试材,比较了其叶绿素含量、抗氧化酶系统及光合生理特性。结果表明:宽叶马齿苋叶绿素和类胡萝卜素的含量略高于窄叶马齿苋。宽叶马齿苋C4光合酶磷酸烯醇式丙酮酸羧化酶(PEPC)活性较低,而其净光合速率却远大于窄叶马齿苋。宽叶马齿苋抗氧化生理指标均超过了窄叶马齿苋,其中可溶性蛋白含量、可溶性糖含量、超氧化物歧化酶(SOD)活性、过氧化氢酶(CAT)活性和丙二醛(MDA)含量差异显著;脯氨酸含量和过氧化物酶(POD)活性差异不显著。该研究为马齿苋的高光效研究和园艺开发利用提供了技术参考。With two ecotypes of Portulaca oleracea （broad leaf and narrow leaf） as materials, chlorophyll content, antioxidant enzyme system,photosynthetic physiological characteristic of them were studied. The results showed that the chlorophyll and carotenoid contents of broad leaf Portulaca oleracea were higher than that in narrow leaf one. The PEPC activities and intercellular C02 concentration of broad leaf Portulaca oleracea was lower than that in narrow leaf one. The net photosynthetic rate and transpiration rate were opposite. The contents of soluble protein content, soluble sugar content, proline content and MDA content and the activities of SOD,POD and CAT in broad leaf Portulaca oleracea were all higher than that in narrow leaf one. It would provide theoretic basis and technical approach for phosphorus with high efficiency and horticultural development.

关 键 词：马齿苋 光合特性 抗氧化酶 

分 类 号：Q949.745.6[生物学—植物学]