干旱区生态环境知识资源中心(Arid): 荒漠半灌木白滨藜种子的萌发特性及其生态意义

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	荒漠半灌木白滨藜种子的萌发特性及其生态意义
其他题名	Seed germination characteristics of the desert subshrub Atriplex cana and its ecological significance
	蔡丹红 1; 严成 2; 魏岩 1
来源期刊	草业学报
ISSN	1004-5759
出版年	2015
卷号	24 期号:10 页码:131-138
中文摘要	白滨藜是具有抗旱、抗盐碱和耐贫瘠能力的半灌木,为新疆地区的良等牧草。通过研究温度、贮藏时间、苞片及盐分对白滨藜种子萌发的影响,结果表明:白滨藜种子萌发的最适温度为20/30℃和25/35℃。室温干藏2~8个月显著提高种子的萌发速率,干藏10个月后,种子萌发速率与萌发率显著降低。苞片延缓种子吸胀,对种子的最终萌发率有显著影响;去除苞片可以明显促进种子的萌发。浓度低于0.8 mol/L的Na Cl溶液对种子萌发的影响不大;但从0.8 mol/L起萌发率随着浓度增高而降低,直至为零;将在0.05~4.00 mol/L盐溶液中处理的种子转移至蒸馏水后,仍有一定的萌发恢复率,表明Na Cl处理后的部分种子有保持活力的能力,部分种子丧失活力。对白滨藜种子萌发特性的研究,为揭示其萌发行为进化和生态适应机制提供科学依据,也为新疆荒漠盐碱地区饲用半灌木引种改良,良种繁育提供基础资料。
英文摘要	Atriplex cana is a xerophytic subshrub with drought resistance, salinity resistance and low fertility tolerance. It is a useful forage plant in Xinjiang. Experiments were conducted to determine the effects of temperature, seed bract removal, and NaCl on seed germination. Seeds were able to germinate in a range of temperatures from 5/15℃ to 25/35℃. The higher the temperature, the faster the germination occurred. The optimum temperature regime for seed germination was 20/30℃ and 25/35℃. Under a 25℃ dark/35℃ light regime, the final germination percentage reached a maximum value after 6-8 days of hydration, while under 5/15℃ and 10/20℃ temperature regimes final germination percentage was achieved after 25-34 days. There was a significant increase in seed germination rate after 2-8 months seed storage, while germination percentage of seeds decreased when exposed to natural atmospheric conditions for 10 months. Bracts formed a mechanical barrier to water uptake, and has a significant influence on the final seed germination rate. Removal of bracts promoted seed germination. Germination was not affected by NaCl at concentrations below 0.8 mol/L, but was decreased by NaCl at higher concentrations. Seeds incubated in NaCl at concentrations of 0.05-4.00 mol/L recovered after being transferred to distilled water. After NaCl treatment some seeds retained their vigor, while others lost vigor. Research into seed germination characteristics may reveal a scientific basis for this ecological adaptation trait. Such research may also provide basic data for improvement salinity tolerant forage subshrub production in the Xinjiang desert.
中文关键词	白滨藜 ; 温周期 ; NaCl胁迫 ; 苞片 ; 种子萌发
英文关键词	Atriplex cana temperature NaCl stress bracts germination
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5543035
来源机构	中国科学院新疆生态与地理研究所 ; 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/2XILL650/232431
作者单位	1.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; 2.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	蔡丹红,严成,魏岩. 荒漠半灌木白滨藜种子的萌发特性及其生态意义[J]. 中国科学院新疆生态与地理研究所, 新疆农业大学,2015,24(10):131-138.
APA	蔡丹红,严成,&魏岩.(2015).荒漠半灌木白滨藜种子的萌发特性及其生态意义.草业学报,24(10),131-138.
MLA	蔡丹红,et al."荒漠半灌木白滨藜种子的萌发特性及其生态意义".草业学报 24.10(2015):131-138.