【摘要】 以外来物种飞机草、紫茎泽兰及同泽兰属的本地泽兰和佩兰为材料,通过石蜡切片,对不同种植物叶片解剖结构进行研究,以了解入侵种与本地种叶片结构的差异,探讨其结构特征与生态环境的关系。结果表明,4种植物叶片均具有表皮细胞体积大、被表皮毛、栅栏组织不发达、海绵组织发达等相似的结构,飞机草和紫茎泽兰具有外表皮分泌结构、厚的角质层和叶片、较多的维管束及较发达的维管组织,而泽兰和佩兰则不具有这些适应干旱的结构特征,说明两个外来物种更能适应干旱环境,具有较强的竞争能力。更多还原

【Abstract】 A comparative study has been undertaken to elucidate variations in anatomical characteristics amongst invasive exotic species Eupatorium odoratum,E.adenophorum and local Eupatorium plants Herba Lycopi and Herba Eupatorii.Microtome section method has been used to differentiate the anatomical features and to study their relationship with the ecological environment.The results showed similarities in some leaf anatomical features such as large epidermal cell with epidermal hair,undeveloped palisade tissue and developed spongy tissue,etc.,in all the plants.However,E.odoratum and E.adenophorum were characterized by secretory structures in outer epidermis covered by thick cuticle,much vascular bundles and more developed vascular tissues owing to the presence of drought environment,which were not present in the two local plants.These features reflected that two exotic species could preferably adapt the drought environment and have the stronger competitive ability to tolerate drought.更多还原