干旱区生态环境知识资源中心(Arid): NaCl胁迫对疣苞滨藜种子萌发和早期幼苗生长的影响

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	NaCl胁迫对疣苞滨藜种子萌发和早期幼苗生长的影响
其他题名	Germination and Seeding Growth of Atriplex verrucifera Bieb.under NaCl Stress
	廉彭彭; 周桂玲
ISSN	1000-4025
出版年	2008
卷号	28 期号:12 页码:2461-2466
中文摘要	在光/暗(12 h/12 h)条件下研究了温度、苞片和NaCl浓度对疣苞滨藜种子萌发及其恢复的影响,同时观察萌发后幼根在NaCl中的生长和恢复情况.结果显示:(1)疣苞滨藜种子在温度周期为5℃/2℃、15℃/5℃、20℃/10℃、25℃/5℃、25℃/15℃中处理12 d后种子萌发率均达到80%以上,其最适萌发温度为25℃/15℃.(2)苞片对种子萌发不存在抑制作用,但能够延缓萌发时间.(3)低浓度的NaCl能促进种子萌发和幼根的伸长,且在0.2 mol/L时达到最大,在0.8 mol/L时完全抑制种子萌发和幼苗的生长.(4)经过不同浓度NaCl预处理后的种子,其萌发恢复率随原处理浓度的升高而升高,且最终萌发率都高于对照.研究表明,NaCl处理对疣苞滨藜种子没有造成伤害,其抑制萌发是通过渗透效应而不是离子毒害;疣苞滨藜种子和幼苗对盐分的耐性是其适应盐渍荒漠环境的重要原因.
英文摘要	We studied the seed germination ecology of Atriplex verrucifera Bieb.The research aspects include:effect of temperature,bracts on seed germination;effect of NaCl concentration on seed germination and germination recovery,on radicle elongation and elongation recovery after seeding transferred to distilled water.The results showed that:(1)The germination rate of A.verrucifera seeds can reach above 80% in a wide range of thermoperiod treatments of 5℃/2℃,15℃/5℃,20℃/10℃,25℃/5℃,25℃/15℃,the optimal temperature for germination was 25℃/15℃.(2)The bracts did not inhibite A.verrucifera seed germination,but bracts can elongate the time of germination.(3)Germination and radical elongation were promoted by 0.2 mol/L NaCl and were completely inhibited by 0.8 mol/L NaCl.(4)Seeds that were incubated in NaCl solution for 12 d recovered after being transferred to distilled water and the percentage of recovery from high salinity was higher than low concentrations.The final germination percentages in NaCl were higher than the nonsaline control.The result incited that NaCl inhibited germination by osmotic stress.The adaptive strategy help A.verrucifera survive and reproduce successfully in the salt desert of Xinjiang.
中文关键词	疣苞滨藜 ; 温度 ; NaCl胁迫 ; 苞片 ; 种子萌发 ; 恢复率
英文关键词	Atriplex verrucifera Bieb. temperature salt stress bract seed germination germination recovery
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:3441519
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/2XILL650/222938
作者单位	新疆农业大学草业与环境科学学院, 新疆草地资源与生态重点实验室, 乌鲁木齐, 新疆 830052, 中国
推荐引用方式 GB/T 7714	廉彭彭,周桂玲. NaCl胁迫对疣苞滨藜种子萌发和早期幼苗生长的影响[J]. 新疆农业大学,2008,28(12):2461-2466.
APA	廉彭彭,&周桂玲.(2008).NaCl胁迫对疣苞滨藜种子萌发和早期幼苗生长的影响.,28(12),2461-2466.
MLA	廉彭彭,et al."NaCl胁迫对疣苞滨藜种子萌发和早期幼苗生长的影响".28.12(2008):2461-2466.

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