甲烷胁迫对绿地植物生理生态特性的影响  

Effects of methane stress on the ecophysiological characteristics of greenbelt plants

作　　者：杨文静[1,2] 董世魁[2] 张相锋[2] 刘晓静[1] 

机构地区：[1]甘肃农业大学草业学院,兰州7300702 [2]北京师范大学环境学院水环境模拟与污染控制国家重点实验室,北京100875

出　　处：《生态学杂志》2009年第7期1272-1276,共5页Chinese Journal of Ecology

基　　金：国家863高技术计划项目(2007AA06Z350);国家自然科学基金项目(50808017);北京市优秀人才资助项目(PYZZ090422001973)

摘　　要：甲烷胁迫是限制垃圾填埋场绿化植物存活和生长的主要因素。在室内模拟条件下,利用盆栽试验研究了2种绿地植物高羊茅和苜蓿对甲烷胁迫的适应性。结果表明:甲烷胁迫严重影响2种绿化植物的生长,主要表现在生长速度减小、光合作用减弱、干物质积累量减少;2种植物均通过提高体内脯氨酸含量来增加对甲烷胁迫的耐受力,苜蓿还可以通过降低SOD酶的活性来抵御甲烷胁迫;对2种绿化植物而言,脯氨酸含量可以作为评定其耐甲烷胁迫的主要生理指标。Methane （ CH4 ） stress is one of the main factors limiting the survival and growth of greenbelt plants on garbage landfill, while the selection of adaptive plants is of significance in the re-vegetation and recovery of the landfill. In this study, two greenbelt plants Festuca arundinacea were utilized to testify their adaptability to the CH4 stress in laboratory. The growth rate and net photosynthesis rate of test plants decreased under CH4 stress, but the plants could enhance their CH4-tolerance via the increase of proline accumulation in their organs. M. sativa could also resist the CH4 stress via decreasing its SOD activity. For the two test plants, their proline content could be used as a physiological indicator to judge their resistance to CH4 stress.

关 键 词：甲烷胁迫 绿地植物 净光合速率 抗氧化酶 

分 类 号：X173[环境科学与工程—环境科学]