干旱区生态环境知识资源中心(Arid): 光照和温度对沙芥和斧翅沙芥植物种子萌发的影响

Arid

	光照和温度对沙芥和斧翅沙芥植物种子萌发的影响
其他题名	Effects of light and temperature on the germination of Pugionium cornutum (L. ) Gaertn. and Pugionium dolabratum Maxim. seeds
	宋兆伟 1; 郝丽珍 1; 黄振英 2; 李娜 1; 赵清岩 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2010
卷号	30 期号:10 页码:2562-2568
中文摘要	研究了生长于不同生境下的沙芥(Pugionium cornutum(L. ) Gaertn. )和斧翅沙芥(Pugionium dolabratum Maxim. )种子萌发对光照和温度的响应. 结果表明:沙芥和斧翅沙芥种子在光下萌发受到显著(P<0. 05)的抑制作用,其中沙芥种子萌发受光的抑制作用强于斧翅沙芥种子. 在黑暗10--40℃恒温条件下,沙芥和斧翅沙芥种子在15--35℃范围内均可萌发,在15℃和 35℃下沙芥种子的萌发要优于斧翅沙芥种子;其种子分别在25℃和30℃下达到最佳的萌发响应,在此条件下斧翅沙芥种子的萌发特性优于沙芥种子. 在黑暗变温条件下,沙芥和斧翅沙芥种子在20/30℃(12h/12h)下达到最佳的萌发响应,此处理下的萌发率高于其各自最佳恒温处理下的萌发率,其萌发后幼苗下胚轴和胚根的长度较最佳恒温处理有明显的下降,但它们的干重却差异较小,说明变温处理有利于两种种子的萌发和形成强壮的幼苗. 综上所述,沙芥和斧翅沙芥种子在黑暗和20/30℃变温条件下有利于种子萌发和幼苗建成
英文摘要	Controlled experiments were conducted to investigate the effect of light and temperature on seed germination of Pugionium cornutum (L. ) Gaertn. and its congeners P. dolabratum Maxim., to better understanding how they adapt to desert habitats at seed germination stage. Results showed that light significantly (P < 0.05) inhibited seed germination, and the inhibition effects was stronger on P. cornutum than P. dolabratum. At constant incubating temperature and darkness, the seed of both species can germinate at gradients from 15℃ to 35℃, and the germination percentages of P. cornutum were significantly higher than those of P. dolabratum at 15℃ and 35℃ respectively. The optimal germination temperature for P. cornutum and P. dolabratum were at 25℃ and 30℃ respectively. Under alternating temperature and darkness conditions, the optimal temperature for seed germination of two congeners was both occurring at 20/30C ( 12h/12h). Percentages of seed germination were higher at 20/30℃ than their respective optimal constant temperatures of both species; In addition, seedling hypocotyl and radicel length of both species developed at 20/30℃ were shorter than that at 25℃ and 30℃ respectively, but their dry weight were not obviously declined. Indicating alternating temperature has advantages for seed germination and seedling development of two congeners. In summary, darkness and at 20/30℃ daily alternating temperatures are the favorable conditions for seed germination and seedling establishment of these two desert species
中文关键词	沙芥 ; 斧翅沙芥 ; 种子萌发 ; 沙生植物 ; 恒温 ; 变温
英文关键词	Pugionium cornutum ( L. ) Gaertn Pugionium dolabratum Maxim. seed germination psammophyte constant temperature alternating temperature
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:3948884
来源机构	中国科学院植物研究所 ; 内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225506
作者单位	1.内蒙古农业大学农学院, 内蒙古野生特有蔬菜种质资源与种质创新重点实验室, 呼和浩特, 内蒙古 010019, 中国; 2.中国科学院植物研究所, 植被与环境变化国家重点实验室, 北京 100093, 中国
推荐引用方式 GB/T 7714	宋兆伟,郝丽珍,黄振英,等. 光照和温度对沙芥和斧翅沙芥植物种子萌发的影响[J]. 中国科学院植物研究所, 内蒙古农业大学,2010,30(10):2562-2568.
APA	宋兆伟,郝丽珍,黄振英,李娜,&赵清岩.(2010).光照和温度对沙芥和斧翅沙芥植物种子萌发的影响.生态学报,30(10),2562-2568.
MLA	宋兆伟,et al."光照和温度对沙芥和斧翅沙芥植物种子萌发的影响".生态学报 30.10(2010):2562-2568.