干旱区生态环境知识资源中心(Arid): 野榆钱菠菜的果实多型性及其萌发对策

Arid

	野榆钱菠菜的果实多型性及其萌发对策
其他题名	Study on Fruit Polymorphism and Germination Measures of Atriplex aucheri Moq. Seeds
	魏岩 1; 刘鹏伟 2; 安沙舟1
ISSN	1001-4675
出版年	2007
卷号	24 期号:6 页码:835-839
中文摘要	野榆钱菠菜有3种形态的果实和种子,这3种果实在形状、大小、颜色、着生方式及包被其苞片的大小上均有差异.以野榆钱菠菜的3种果实(种子)为材料,在暗/光为5 ℃/25 ℃,5 ℃/15 ℃,15 ℃/25 ℃,暗周期和光周期同为12 h的条件下,进行萌发实验.结果表明:新采收的C型种子成熟后具有一定的萌发能力,并且在5 ℃/25 ℃下的萌发率最高(＞90%);A型和B型种子存在休眠现象.划破种皮后,A型和B型种子在3个温变处理下的萌发率显著提高,12 星期的低温层积处理也能有效地加速和提高A型和B型种子的萌发率,表明A型和B型种子的休眠属于非深度生理休眠.
英文摘要	In this study,an observation on fruits of Atriplex aucheri Moq.is carried out.It is found that the fruits of Atriplex aucheri are heterocarpy.There are three types of fruits,that is the seeds are different in shape,size,color and size of bracts attaching fruits.Type A fruits originate from bisexual ebracteate flowers and are consisted of small,black and lens-shaped achenes enclosing within a 5-lobed perianth.Type B fruits are produced by female bracteate flowers.Although its achenes are larger than those of type A,they have a similar appearance and are covered by extending bracteoles.Type C fruits are also produced by female bracteate flowers,but its achenes are brown and rather large and covered by extending bracteoles bigger than those of type B fruits.Seeds of Atriplex aucheri were germinated for 50 days in incubators with 12-hour photoperiod and 12-hour thermoperiod(dark/light) of 5 ℃/15 ℃,5 ℃/25 ℃ and 15 ℃/25 ℃.The mature type C seeds can germinate,the germination percentage of type C seeds is the highest at 5 ℃/25 ℃(dark/light).Type A and type B seeds have non-deep physiological dormancy,and they germinate slowly to a low percentage.Rate and percentage of the germination of type A seeds and type B seeds can be increased by scarifying the fruit coat under 12-week cold stratification.Utricle polymorphism may allow Atriplex aucheri to respond to the spatiotemporal change of environmental conditions,thus the survival of this annual species in the severe desert habitats can be increased.
中文关键词	野榆钱菠菜(Atriplex aucheri Moq.) ; 种子多型性 ; 萌发 ; 准噶尔盆地 ; 新疆
英文关键词	Atriplex aucheri Moq. seed polymorphism germination Junggar Basin Xinjiang
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3003758
来源机构	新疆农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221011
作者单位	1.新疆农业大学,草业工程学院, 乌鲁木齐, 新疆 830052, 中国; 2.新疆农业大学,林学院, 乌鲁木齐, 新疆 830052, 中国
推荐引用方式 GB/T 7714	魏岩,刘鹏伟,安沙舟. 野榆钱菠菜的果实多型性及其萌发对策[J]. 新疆农业大学,2007,24(6):835-839.
APA	魏岩,刘鹏伟,&安沙舟.(2007).野榆钱菠菜的果实多型性及其萌发对策.,24(6),835-839.
MLA	魏岩,et al."野榆钱菠菜的果实多型性及其萌发对策".24.6(2007):835-839.