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| 酸雨对木芙蓉幼苗光合作用及抗氧化酶活性的影响 | |
| 引用本文： | 王应军,邓仕槐,姜静,尚鹤,林波,孙亚琴,胡晓梅.酸雨对木芙蓉幼苗光合作用及抗氧化酶活性的影响[J].核农学报,2011,25(3):588-593,581. |
| 作者姓名： | 王应军 邓仕槐 姜静 尚鹤 林波 孙亚琴 胡晓梅 |
| 作者单位： | 1. 四川农业大学资源环境学院农业环境工程省重点实验室,四川雅安,625014 2. 中国林业科学研究院森林生态环境与保护研究所,北京,100091 3. 中国林业科学研究院森林生态环境与保护研究所,北京100091;北京林业大学林学院,北京100083 |
| 基金项目： | 国家"十一五"计划攻关项目,四川省教育厅重点项目 |
| 摘 要： | 以pH 5.6为对照,采用pH 4.0、pH 3.0、pH 2.0强度的酸雨对2年生木芙蓉进行人工模拟胁迫,研究酸雨胁迫对木芙蓉叶片可见伤害、质膜透性(Membrane Permeability,MP)、叶绿素(Chlorophyll,Chl)含量、抗氧化酶系统及气体交换参数的影响.研究结果表明,pH 2.0和pH 3... |
| 关 键 词： | 木芙蓉 模拟酸雨 光合作用 抗氧化酶活性 |
| 收稿时间： | 2010-11-02 |
| 修稿时间： | 2011-03-08 |
EFFECTS OF ACID RAIN ON PHOTOSYNTHESIS AND ANTIOXIDANT ENZYME ACTIVITY OF H.mitabilis L.SEEDLINGS |
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| WANG Ying-jun,DENG Shi-huai,JIANG Jing,SHANG He,LIN Bo,SUN Ya-qin,HU Xiao-mei.EFFECTS OF ACID RAIN ON PHOTOSYNTHESIS AND ANTIOXIDANT ENZYME ACTIVITY OF H.mitabilis L.SEEDLINGS[J].Acta Agriculturae Nucleatae Sinica,2011,25(3):588-593,581. | |
| Authors: | WANG Ying-jun DENG Shi-huai JIANG Jing SHANG He LIN Bo SUN Ya-qin HU Xiao-mei |
| Institution: | 1. Sichuan Province Key Laboratory of Agricultural Environmental Engineering, College of Resource and Environment, Sichuan Agricultural University, Ya’an, Sichuan 625014; 2. Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091; 3. Department of Forest Science, Beijing Forestry University, Beijing 100083 |
| Abstract: | A pot experiment was conducted to study the effects of simulated acid rain on foliar damage, chlorophyll (Chl) content, membrane permeability (MP), antioxidant enzyme activity and gas exchange parameters in leaves of 2-year H. mitabilis seedlings. Four gradients of simulated acid rain solutions of pH 5.6 (CK), 4.0, 3.0 and 2.0 were used. Results showed that the leaves treated by pH 2.0 and 3.0 showed visible injury spots to various extent. The membrane permeability (MP) increased significantly after acid rain stress with an extremely significant negative correlation to pH value (r=－0.961**). The maximum catalase (CAT) activity and peroxidase (POD) activity were observed at pH 2.0(48.75mg·min-1·g-1·FW and 77.69U·min-1·g-1·FW, respectively), while that of superoxide dismutase (SOD) activity were observed at the pH 3.0(216.80U·g-1·FW). Chlorophyll a (Chl a), chlorophyll b (Chl b), total chlorophyll content, Chl a/b, net photosynthetic rate (Pn), stomatal conductivity (Gs) and transpiration rate (Tr) decreased with decreaseing pH value of pH, and intercellular CO2concentration (Ci) showed a trend of decreasing first and then increasing, while water use efficiency (WUE) was opposite. The visible damage threshold of H. mitabilis by simulated acid rain was less than pH 2.0, and the threshold on the physiological activity was among pH 2.0 to 3.0, which indicated that H. mitabilis had higher tolerance to acid rain stress. This study could provide theoretical reference for cultivation management and resistance screening of H. mitabilis, and offer basic theory to choose the greening tree species in Southern cities. |
| Keywords: | H mitabilis L " target="_blank">zz')" href="#"> H mitabilis L simulated acid rain photosynthesis antioxidant enzyme activity |
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