生态环境学报Issue(7)：1128-1131,4.DOI:10.16258/j.cnki.1674-5906.2015.07.008
入侵植物肿柄菊对三叶鬼针草的化感作用
Allelopathy of InvasiveTithonia Diversifoliaon Bidens Pilosa
摘要
Abstract
Tithonia diversifolia A Gray andBidens pilosa L were exotic invasive species (Compositae). The objective of the study was to explore the allelopathy ofT. diversifolia onB. pilosa and the later controlling possibility by the former. The seeds and seedlings of the latter were treated by different contents (0.8%, 1.6%, 2.4% and 3.2%) of the aqueous extract of the former leaves in a Petri dish, and seed vigor and length, antioxidase activity, permeability of plasma membrane ofB. pilosaIseedlingleaves were determined. The results showed that seed germination index and vigor index, and seedling length decreased with the increase of the aqueous extract contents, and allelopathic index (RI) < 0; and relative conductivity increased, and the integrity of seedling cell membrane decreased. But catalase (CAT), superoxide dismutase (SOD) and peroxidase (POD) activities increased with increase of the aqueous extract contents, and allelopathic index (RI) > 0. When the content of the aqueous extract ofT. diversifolialeaves reached to 3.2% the seed germination index, vigor index and seedling length ofB. pilosa was 25.7%, 2.1% and 9.4% of control respectively. CAT, SOD and POD activity of controls was 68.3±2.3, 0.6±0.0 and 0.5±0.1 respectively, but the activity of 3.2% content group was 117.2±3.2, 1.2±0.1 and 0.9±0.2 respectively. SoT. diversifolia had a strong allelopathy on B. pilosa, and the degree of the activity was increased with content increase of the aqueous extract.关键词
肿柄菊(Tithonia diversifoliaA. Gray)/三叶鬼针草(Bidens pilosa L.)/入侵植物/化感效应/种子活力/抗氧化酶/细胞膜透性Key words
Tithonia diversifolia A Gray/Bidens pilosa L./invasive plants/allelopathy/seed vigor/antioxidases/permeability of plasma membrane分类
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..入侵植物肿柄菊对三叶鬼针草的化感作用[J].生态环境学报,2015,(7):1128-1131,4.基金项目
云南省硕士点建设备案学科植物保护和云南省教育厅重点项目（2013Z148）。 （）
