再力花地下部水浸提液对几种常见水生植物的化感作用  

Allelopathic effects from aqueous extracts of exotic Thalia dealbata on six aquatic plant species

作　　者：王媛[1] 缪丽华 高岩[1] 季梦成[1] 

机构地区：[1]浙江农林大学风景园林与建筑学院,浙江临安311300 [2]中国湿地博物馆,浙江杭州310013

出　　处：《浙江农林大学学报》2012年第5期722-728,共7页Journal of Zhejiang A&F University

基　　金：杭州市科技计划项目(20100933B18);中国湿地博物馆重点资助项目(CWM2010-W02)

摘　　要：采用生物测定方法研究了再力花Thalia dealbata地下部水浸提液对荇菜Nymphoides peltatum,苦草Vallisneria natans,水田芥Nasturtium officinale,黄菖蒲Iris pseudacorus,芦苇Phragmites australis和水蓼Polygonum hydropiper等6种植物种子萌发以及幼苗生长的影响。结果表明:再力花地下部水浸提液对6种种子的萌发率、萌发指数、株高、根长、鲜质量、干质量均有不同程度的抑制作用,抑制作用随着浸提液质量浓度的提高而增强。高质量浓度提取液对幼苗生长有显著抑制作用(P<0.01),50 g·L-1的再力花地下部水浸提液对6种水生植物株高抑制率分别为29.2%,64.9%,42.3%,87.1%,18.16%和75.6%,根长抑制率分别为50.5%,90.1%,72.7%,76.2%,29.9%和74.2%。再力花地下部水浸提液对各项指标的影响强弱依次为萌发指数>发芽率>根长>干质量>鲜质量>苗高。受试植物种子总化感效应大小依次为水蓼>水田芥>苦草>黄菖蒲>荇菜>芦苇。To test the allelopathic effects of Thalia dealbata on seed germination and seedling growth, aqueous extracts of the T. dealbata rhizome and root were applied to six aquatic plants; namely, Nymphoides pelta turn, Vallisneria natans, Nasturtium officinale, Iris pseudacorus, Phragmites australis, and Polygonum hy dropiper using the bioassay method. Results showed that the aquatic rhizome and root extracts at a concentra tion of 50 g. Lq had highly significant （P 〈 0.01 ） allelopathic effects on seed germination for all six aquatic plant species. Seedling shoot length for the six listed species above were reduced 29.2%, 64.9%, 42.3%, 87.1%, 18.2%, and 75.6%, respectively; and seedling root length was reduced 50.5%, 90.1%, 72.7%, 76.2%, 29.9%, and 74.2%, in that order. Also the seed germination index was more sensitive to extract ap plication than germination percentage and other indexes with allelopathic sensitivity in the order of Polygonum hydropiper 〉 Nasturtium officinale 〉 V. natans 〉 1. pseudacorus 〉 Nymphoides peltata 〉 Phragmites aus tralis. [Ch, 3 fig. 1 tab. 26 ref.]

关 键 词：植物学 再力花 化感作用 水生植物 水浸提液 种子萌发 

分 类 号：S718.3[农业科学—林学] Q946[生物学—植物学]