火烧迹地土千年健对尼泊尔酸模的化感作用  

Allelopathy of Extract Solution of Vaccinium fragile on Rumex nepalensis in Burned Forestlands

作　　者：李天星[1] 尹秋林[1] LI Tianxing YIN Qiulin(School of Chemistry and Life Sciences,Chuxiong Normal University,Chuxiong,Yurman 67500)

机构地区：[1]楚雄师范学院化学与生命科学学院,云南楚雄675000

出　　处：《北方园艺》2016年第18期65-70,共6页Northern Horticulture

基　　金：国家自然科学基金资助项目(31360102);云南省应用基础研究计划资助项目(2011FB089);楚雄师范学院院级学术骨干计划资助项目(2011<植物学>);云南省省级重点学科建设"生物学"和楚雄师范学院校级重点学科建设"生物学"资助项目(05YJJSXK03);云南省高校特色植物资源研究与开发科技创新团队支持计划资助项目(IRTSTYN);云南省高校应用生物学重点实验室基地建设资助项目

摘　　要：为探索化感作用对药用植物栽培的影响及火灾后化感作用对森林植被自然恢复的影响机制,选取滇中地区针阔混交林火烧迹地优势物种的2种药用植物尼泊尔酸模和土千年健为研究对象,研究了土千年健水浸液对尼泊尔酸模种子及其幼苗的化感作用和作用机理。结果表明:土千年健水浸液对尼泊尔酸模种子萌发、幼苗主根长度及其鲜质量和干质量以及地上部分的高度及其鲜质量和干质量、幼苗叶绿素含量都呈现出低浓度促进、高浓度抑制的现象;随着土千年健水浸液浓度的增大,其对尼泊尔酸模幼苗过氧化物酶活性的抑制作用逐渐增强,但其幼苗脯氨酸含量、丙二醛含量却逐渐升高。研究发现,土千年健水浸液通过抑制保护酶活性和叶绿素的生成,增加膜脂过氧化和逆境伤害,抑制尼泊尔酸模种子萌发和幼苗生长,从而表现出化感作用,且化感效应随着浓度的增加而增强。该研究为药用植物栽培及火灾后森林植被的人工恢复提供参考。In order to explore allelopathic on cultivation of medicinal plants and its mechanism of natural regeneration in burned forestlands,allelopathy and its mechanism of extract solution of Vaccinium fragile on seed germination and seedling growth of Rumex nepalensis were studied with the selection of the two medicinal plants of dominant species of coniferous broad-leaved forest in burned forestlands in central Yunnan Province.The results showed that seed germination,main root length and its fresh weight and dry weight of seedling,and seedling height and its fresh weight and dry weight,and content of chlorophyll of seedling of R.nepalensis were increased at lower concentration and decreased at higher concentration of extract solution of V.fragile;POD activity of seedling of R.nepalensis was gradually reduced,but MDA content and Pro content of seedling of R.nepalensis were promoted with the increasing concentration of extract solution of V.fragile.It was found that allelopathy of extract solution of V.fragile on R.nepalensis in burned forestlands occurred with the activity of enzyme,content of chlorophyll,seed germination and seedling growth inhibited and the degree of membrane lipid peroxidation and stress harm strengthened,and allelopathic of extract solution of V.fragile on R.nepalensis were increased with higher concentration of extract solution of V.fragile.So the research will give us an advice on cultivation of medicinal plants and man-made regeneration in burned forestlands.

关 键 词：火烧迹地 化感作用 土千年健 尼泊尔酸模 

分 类 号：Q145[生物学—生态学]