五种菊科植物种子萌发对温度的响应及其入侵性  被引量:17

Responses of seed germination of five Asteraceae species to temperature and their invasivity

在线阅读下载全文

作  者:陈文[1] 王桔红[2] 陈丹生[2] 朱慧[2] 

机构地区:[1]韩山师范学院地理与旅游管理系,广东潮州521041 [2]韩山师范学院生物学系,广东潮州521041

出  处:《生态学杂志》2015年第2期420-424,共5页Chinese Journal of Ecology

基  金:国家自然科学基金项目(31470021);广东韩山师范学院2012年科研团队项目(LT201204);广东韩山师范学院科研启动项目(QD20131105)资助

摘  要:以粤东地区4种菊科入侵植物三叶鬼针草(Bidens pilosa)、微甘菊(Mikania micrantha)、南美蟛蜞菊(Wedelia trilobata)、藿香蓟(Ageratum conyzoides)和1种本土植物醴肠(Eclipta prostrata)为材料,研究了种子扩散时的萌发率以及种子经历低温(15℃、湿润)和常温(25℃和25/15℃、湿润)后的萌发响应特点。结果表明:种子扩散时,三叶鬼针草、醴肠、藿香蓟种子萌发率分别为100%、98%和62%-78%,微甘菊为44%-52%,南美蟛蜞菊为2%(25℃)和86%(25/15℃);5种菊科植物种子在15℃培养期间,平均萌发率由高至低依次是三叶鬼针草(82%-91%)、微甘菊(19%-26%)、醴肠(9%-12%)、南美蟛蜞菊(0-1%)、藿香蓟(0);在25℃和25/15℃下,藿香蓟种子萌发率为35%-49%,醴肠为58%-68%,南美蟛蜞菊为4%(25℃)和55%(25/15℃)。种子快速萌发、高萌发率,以及宽泛的萌发温度需求是1年生草本入侵种的主要入侵特性。Seed germinations of five Asteraceae species including Bidens pilosa, Mikania micran-tha, Wedelia trilobata, Ageratum conyzoides and Eclipta prostrata (a native species) from easternGuangdong were studied following wet-storage at 15 ℃ for 30 days and then incubation at 25 ℃or 25/15 ℃ for 30 days, to reveal the response of germination to temperature. The result showedthat B. pilosa, E. prostrate, A. conyzoides, M. micraatha and W. trilobata seeds germinated to100%, 98%, 62%-78%, 44%-52%, 2% (at 25 ℃ ) -86% (at 25/15 ℃ ) after seed dispers-al, respectively. At the first stage (at 15 ℃ under wet condition), the germination percentages offive Composite plants were 82%-91% (B. pilosa)19%-26% (IV. trilobata), 8.7%-12% (Eprostrata), O- 1% ( W. trilobata), 0% (A. conyzoides). At the second stage ( at 25 ℃ and 25/15 ℃ ), seeds of A. conyzoides germinated to 35% and 49%, E. prostrate to 58%-68%, W. tri-lobata to 4% ( at 25 ℃ ) and 55% ( at 25/15 ℃ ). Quick germination, high germination percent-ages, and broad temperature adaptation of germination may be important characters of these alieninvasive plants.

关 键 词:菊科 入侵植物 温度 种子萌发率 

分 类 号:S451[农业科学—植物保护]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象