Seed germination response to high temperature and water stress in three invasive Asteraceae weeds from Xishuangbanna, SW China
文献类型：期刊论文
| 作者 | Yuan, Xia; Wen, Bin |
| 刊名 | PLOS ONE
 |
| 出版日期 | 2018 |
| 卷号 | 13期号:1页码:- |
| 关键词 | Ageratum-conyzoides L. Horseweed Conyza-canadensis Ecology Saflufenacil Potentials Emergence Plant |
| ISSN号 | 1932-6203 |
| 英文摘要 | Crassocephalum crepidioides, Conyza canadensis, and Ageratum conyzoides are alien annuals naturalized in China, which produce a large number of viable seeds every year. They widely grow in Xishuangbanna, becoming troublesome weeds that compete with crops for water and nutrients. As seed germination is among the most important life-stages which contribute to plant distribution and invasiveness, its adaptation to temperature and water stress were investigated in these three species. Results showed that: (1) These three species have wide temperature ranges to allow seed germination, i.e., high germination and seedling percentages were achieved between 15 degrees C and 30 degrees C, but germination was seriously inhibited at 35 degrees C; only A. conyzoides demonstrated relative preference for warmer temperatures with approximately 25% germination and seedling percentage at 35 degrees C; (2) light was a vital germination prerequisite for C. crepidioides and A. conyzoides, whereas most C. canadensis seeds germinated in full darkness; (3) Although all three species have good adaptation to bare ground habitat characterized by high temperatures and water stress, including their tolerance to soil surface temperatures of 70 E C in air-dried seeds, A. conyzoides seeds exhibited higher tolerance to both continuous and daily periodic high-temperature treatment at 40 E C, and to water restriction (e.g., ca. 65% seeds germinated to -0.8 MPa created by NaCl), which is consistent with their field behavior in Xishuangbanna. This study suggests that seed high-temperature tolerance contributes to the weed attributes of these three species, and that adaptation to local micro-habitats is a critical determinant for invasiveness of an alien plant. |
| 学科主题 | Science & Technology - Other Topics |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 公开日期 | 2018-03-07 |
| 源URL | [http://ir.xtbg.org.cn/handle/353005/10802]  |
| 专题 | 西双版纳热带植物园_支撑系统 |
| 推荐引用方式 GB/T 7714 | Yuan, Xia,Wen, Bin. Seed germination response to high temperature and water stress in three invasive Asteraceae weeds from Xishuangbanna, SW China[J]. PLOS ONE,2018,13(1):-. |
| APA | Yuan, Xia,&Wen, Bin.(2018).Seed germination response to high temperature and water stress in three invasive Asteraceae weeds from Xishuangbanna, SW China.PLOS ONE,13(1),-. |
| MLA | Yuan, Xia,et al."Seed germination response to high temperature and water stress in three invasive Asteraceae weeds from Xishuangbanna, SW China".PLOS ONE 13.1(2018):-. |
入库方式： OAI收割
来源：西双版纳热带植物园
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