作　　者： ; ; ; ; ; ;

机构地区： 韩山师范学院生物系

出　　处： 《武汉植物学研究》 2007年第1期75-78,共4页

摘　　要： 采用电导率法和分光光度法,测定了5个不同的自然生境中入侵杂草五爪金龙(Ipomoea cairica)的4种草本伴生植物火炭母(Polygonum chinense)、三叶鬼针草(Bidens pilosa)、红花酢浆草(Oxalis corymbosa)、鸡矢藤(Pae-deria scandens)的相对电导率和叶绿素含量等生理指标,并设相同生境中不与五爪金龙伴生的这4种草本植物为空白对照。结果表明:4种伴生草本植物的叶绿素含量与对照相比差异达显著或极显著水平;三叶鬼针草相对电导率差异显著,另外3种伴生植物的相对电导率变化不明显,说明五爪金龙对火炭母、红花酢浆草、鸡矢藤3种草本伴生植物的叶绿素含量影响显著,而对三叶鬼针草的叶绿素含量和质膜透性均有显著影响。 Relative conducity and chlorothyll content of the invasive weed Ipomoea cairica herbaceous companion species such as Polygonum chinense, Bidens pilosa, Oxalis corymbosa and Paederia scandens were mensurated in five different habitats by using the conductivity method and photometric method, and the blank comparison experiment was designed to analyze the above species being without I. cairica. The results showed that there was significant correlation between all companion species and uneompanion species of I. cairica at 0.01 or 0.05 level for chlorothyll content, change of relative conductivity wasn＇t distinct among three herbaceous companion species besides B. pilosa, which suggested that reducing chlorophyll content was one of the important mechanisms that I. cairica effected its herbaceous companion species, such as Polygonum chinense, O. corymbosa and Paederia scandens, otherwise, the effect mechanisms of I. cairica included reducing chlorothyll content and increasing membranous permeability to B. pilosa.

关 键 词： 五爪金龙 草本伴生种 相对电导率 质膜透性 叶绿素含量

领　　域： [生物学]