欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志 ›› 2012, Vol. 31 ›› Issue (07): 1659-1664.

• 研究报告 • 上一篇    下一篇

外来入侵植物薇甘菊(Mikania micrantha)对温度升高的响应

王瑞龙1,2,3,钟秋华1,2,3,徐武兵1,2,3,宋圆圆1,2,3,苏贻娟1,2,3,曾任森1,2,3**   

  1. (1华南农业大学亚热带农业生物资源保护与利用国家重点实验室, 广州 510642;2农业部华南热带农业环境重点实验室, 广州 510642; 3广东省普通高等学校农业生态与农村环境重点实验室, 广州 510642)
  • 出版日期:2012-07-10 发布日期:2012-07-10

Responses of invasive weed Mikania micrantha to elevated air temperature.

WANG Rui-long1,2,3, ZHONG Qiu-hua1,2,3, XU Wu-bing1,2,3, SONG Yuan-yuan1,2,3, SU Yi-juan1,2,3, ZENG Ren-sen1,2,3**   

  1. (1State Key Laboratory for Conservation and Utilization of Subtropical AgroBioresources, South China Agricultural University, Guangzhou 510642, China; 2Key Laboratory of Tropical AgroEnvironment, Ministry of Agriculture, Guangzhou 510642, China; 3Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, Guangzhou 510642, China)
  • Online:2012-07-10 Published:2012-07-10

摘要: 为探讨全球变化温度升高对外来入侵植物薇甘菊(Mikania micrantha)化感作用和入侵能力的影响,研究不同温度(22、26和30 ℃)处理对其种子萌发、幼苗生长、生物量分配、挥发物成分和化感作用的影响。结果表明,薇甘菊种子在温度为22、26和30 ℃时的萌发率分别为292%、524%和75.2%。30 ℃条件下薇甘菊种子萌发率最高,萌发速度快。温度升高显著增加薇甘菊茎的生长、增加对茎的生物量分配。GC-MS和GC测定显示,温度升高改变了薇甘菊挥发物的化学成分。同时,生物测定表明,温度升高增强薇甘菊挥发物对萝卜(Raphanus sativus)和油菜(Brassica campestris)的化感作用。说明温度升高促进了薇甘菊种子的萌发和生长,同时增强了该植物的化感作用,温度升高可能加速薇甘菊的生物入侵。

关键词: 发光二极管, 光质, 果实品质, 抗氧化能力, 产量

Abstract: In order to evaluate the effects of elevated air temperature under global change on the allelopathy and invasiveness of Mikania micrantha, an important alien invasive plant species in China, this paper studied the seed germination, seedling growth, biomass allocation, volatile components, and allelopathic potential of the plant under effects of three temperature (22, 26, and 30 ℃). After 3 days incubation, the seed germination rate of M. micrantha at 22, 26, and 30 ℃ was 29.2%, 52.4%, and 75.2%, respectively, being the highest at 30 ℃. Elevated temperature also increased the shoot length and biomass allocation to stem significantly. GC-MS and GC analyses showed that elevated temperature altered the chemical composition of the volatiles released from M. micrantha leaves. Bioassay demonstrated that elevated temperature increased the allelopathic effect of M. micrantha volatiles on the growth of Raphanus sativus and Brassica campestris seedlings. The results suggested that elevated temperature promoted the seed germination and seedling growth of M. micrantha, increased its allelopathic potential, and thereby, could accelerate the invasion of the plant.

Key words: LED, light quality, fruit quality, antioxidant capacity, yield.