摘要
探究8种观赏草对铜锌复合胁迫的适应性,并进行优劣排序,以期为重金属污染地观赏草引种提供一定的参考。采用盆栽控制法,铜、锌分别设置5个浓度梯度,测定供试观赏草的生长及抗氧化酶活性指标,并运用Pearson相关性分析和隶属函数法进行综合评析。结果表明,8种观赏草受胁迫伤害程度随铜锌复合胁迫处理浓度的升高而加剧;不同浓度处理对供试观赏草株高和根长的影响存在差异,除个别品种外,植株的株高和根长随处理浓度的增加而下降。随胁迫浓度的升高,8种观赏草的丙二醛含量逐渐增加,而过氧化氢酶(CAT)和超氧化物歧化酶(SOD)活性呈先增后减的趋势;除细叶芒和香茅外,其余6种观赏草的过氧化物酶(POD)活性呈逐渐上升的趋势。Pearson相关性分析表明,除CAT、SOD活性外,铜、锌质量浓度与其他指标均呈显著相关性,生长与抗氧化酶活性指标之间仅有个别存在相关性,而生长指标之间、抗氧化酶活性指标之间均存在显著相关性。采用隶属函数法对供试观赏草的耐铜锌性进行综合评析,耐受性强弱依次为细叶画眉草>金红羽狼尾草>香茅>粉黛乱子草>丽色画眉草>细叶芒>小兔子狼尾草>紫叶狼尾草。
The adaptability of eight ornamental grasses to copper-zinc composite stress was explored,then the advantages and disadvantages were ranked in order to provide theoretical reference for the introduction of ornamental grasses in heavy metal-contaminated areas.The potted control method was used to set up five concentration gradients to measure the growth and antioxidant enzyme activity indexes of the tested ornamental grasses,and then the Pearson correlation analysis and membership function method were used for comprehensive evaluation.The results showed that the degree of stress injury of eight ornamental grasses increased with the increase of treatment concentration.The effects of different concentration treatments on the plant height and root length of the tested ornamental grasses were different.Except for individual varieties,the plant height and root length decreased as the treatment concentration increased.With the increase of stress concentration,the malondialdehyde content of eight ornamental grasses increased gradually,while the activities of catalase(CAT)and superoxide dismutase(SOD)increased first and then decreased.Except Miscanthus sinensis‘Gracillimus’and Cymbopogon citratus,the peroxidase activity of other six ornamental grasses showed a gradual upward trend.The Pearson correlation analysis showed that except CAT and SOD,the concentration of copper and zinc was significantly correlated with other indicators,and there were only a few correlations between growth and antioxidant enzyme activity indicators,while there were significant correlations among growth indexes or antioxidant enzyme activity indicators.Through comprehensive evaluation and analysis by membership function method,the tolerance was in the order of Eragrostis nutans>Pennisetum setaceum>Cymbopogon citratus>Muhlenbergia capillaris>Eragrostis elliotii>Miscanthus sinensis‘Gracillimus’>Pennisetum alopecuroides cv.‘Little Bunny’>Pennisetum setaceum‘Rubrum’.
作者
许志敏
周英
杨鹏辉
熊志秦
吴一非
姜珺珺
丁国昌
XU Zhimin;ZHOU Ying;YANG Penghui;XIONG Zhiqin;WU Yifei;JIANG Junjun;DING Guochang(College of Art and Design,Jiangxi University of Technology,Nanchang 360100,China;College of Landscape Architecture,Fujian Agriculture and Forestry University,Fuzhou 350002,China;Jiujiang Wildlife Conservation Center,Jiujiang 332000,China)
出处
《河南农业科学》
北大核心
2022年第9期114-123,共10页
Journal of Henan Agricultural Sciences
基金
江西科技学院校级教育教学课题(JY2110)
福建农林大学艺术学院园林学院学科专业建设项目(YSYL-bdpy6)
福建农林大学科技创新项目(kFA17334A)
国家林业局森林公园工程中心开放课题(PTJH1500210)。
关键词
观赏草
铜锌复合胁迫
耐受性
隶属函数法
Ornamental grass
Copper-zinc compound stress
Tolerance
Membership function method