生态与农村环境学报2012，Vol.28Issue(2)：139-145,7.
外来入侵植物美洲商陆提取物的化感活性
Allelopathic Activity of the Extract From Phytolacca americana—An Invasive Alien Plant
摘要
Abstract
Effects of extracts from Phytolacca americana, an invasive alien plant, on seed germination and seedling growth of Melilotus officinalis, Brassica pekinensis, Plantago virginica, and Digitaria sanguinalis were investigated in laboratory. Results show that ethanolic extract from the plant 1 000 -4 000, 4 000, and 2 000 -4 000 μg · Ml-1 in concentration significantly inhibited seed germination of B. Pekinensis, P. Virginica, and D, sanguinalis, respectively, and water extract 1 000 - 4 000 μg · Ml-1 ~ in concentration also did significantly that of D. Sanguinalis with the highest inhibition rates being 32. 22% , 46. 56% , 32. 69% , and 28. 57% , respectively. The ethanolic extract 250 -500 μg · Ml-1 in concentration and the water extract 250 - 4 000 μg · Ml-1 in concentration increased root length of M. Officinalis seedlings and both the ethanolic extract 250 - 1 000 μg · Ml-1 in concentration and water extract 250 - 4 000 μg · Ml-1 in concentration promoted growth of the seedling in height, and the water extract 500 (μg · Ml-1) in concentration increased significantly dry weight of the seedlings, with the highest promotion rates being 21. 32% , 37. 89% , 12. 94% , 32. 07% , and 18. 81% , respectively. The ethanolic extract 1 000 -4 000 μg · Ml-1 in concentration and the water extract 4 000 μg · Ml-1 in concentration both inhibited growth of B. Pekinensis roots in length; both the ethanolic and water extracts 2 000 - 4 000 μg · Ml-1 in concentration did the plants in height, and the water extract 4 000 μg · Ml-1 in concentration didseedling dry weight of the plant, too, with the highest inhibition rates being 37. 00% , 20. 95% , 25. 63% , 22. 30% , and 13. 67% , respectively. The water extract 250 - 1 000 |xg ? Ml~' in concentration significantly promoted seedling root length of P. Virginica, and 250 - 4 000 μg · Ml-1 in concentration it did seedling height, too, but the ethanolic extract 1 000 -4 000 μg · Ml-1 in concentration significantly inhibited growth of its root in length, and 4 000 μg · Ml~ in concentration it did seedling height and dry weight of the seedlings, with the highest inhibition rates being 58. 06% , 29. 72% , and 18. 36% , respectively. The ethanolic extract 500 -4 000, 1 000 -4 000 and 2 000 -4 000 μg · Ml-1 in concentration inhibited the seedlings of D. Sanguinalis in root length, height and dry weight, respectively, and the water extract 4 000 μg · Ml-1 in concentration did the seedlings in root length, with the highest inhibition rates being 70. 31% , 44. 65% , 42. 43% , and 35. 50% , respectively. Obviously, P. Americana has a strong effect of allelo-pathic inhibition on seed germination and seedling growth of B. Pekinensis, P. Virginica and D. Sanguinalis, but an effect of allelopathic promotion on invasive plant M. Officinalis, which directly or indirectly strengthens its invasiveness.关键词
美洲商陆/提取物/化感活性/种子萌发/幼苗生长Key words
Phytolacca americana/ extract/ allelopathic activity/ seed germination/ seedling growth分类
农业科技引用本文复制引用
闫小红,张蓓玲,周兵,王宁,杨佳琴..外来入侵植物美洲商陆提取物的化感活性[J].生态与农村环境学报,2012,28(2):139-145,7.基金项目
国家自然科学基金(30860054) （30860054）
江西省教育厅科技计划(GJJ09592) （GJJ09592）
井冈山大学博士科研启动项目(JZB11028) （JZB11028）
井冈山大学大学生创新性实验项目 （）
