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草业学报 ›› 2014, Vol. 23 ›› Issue (1): 192-198.DOI: 10.11686/cyxb20140123

• 研究论文 • 上一篇    下一篇

异子蓬二型性种子萌发对盐胁迫的响应

宋以刚1,2,4,李利1*,曾歆花3,4,邓敏2,张希明1*   

  1. 1.中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011
    2.中国科学院上海辰山植物科学研究中心,上海201602
    3.中国科学院遗传与发育生物学研究所农业资源研究中心,河北石家庄050021
    4.中国科学院大学,北京100049
  • 收稿日期:2013-08-22 出版日期:2014-02-20 发布日期:2014-02-20
  • 通讯作者: E-mail:hillwll@163.com
  • 作者简介:宋以刚(1985-),男,山东淄博人,助理研究员,硕士。E-mail:cherish-faith@163.com
  • 基金资助:
    国家自然科学基金(31070468)资助

Responses of the germination on dimorphic seeds of Suaeda aralocaspica to salt stress

SONG Yi-gang1,2,4,LI Li1,ZENG Xin-hua3,4,DENG Min2,ZHANG Xi-ming1   

  1. 1.Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Ürümqi 830011,China;
    2.Shanghai Chenshan Plant Sciences Research Center,Chinese Academy of Sciences,Shanghai 201602,China;
    3.Center for Agricultural Resources Research,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Shijiazhuang 050021,China;
    4.Graduate University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2013-08-22 Online:2014-02-20 Published:2014-02-20

摘要: 异子蓬是中亚荒漠区系特有的一年生盐生植物,其种子具有二型性(棕色种子和黑色种子)。为了探讨异子蓬二型性种子萌发对不同盐分胁迫的响应,实验分析了二型性种子的渗透调节物质、盐胁迫下胚胎中Na+和K+的含量差异,以及不同NaCl浓度下棕色种子萌发后胚根和胚芽的生物量差异、Na+和K+的含量差异等。结果表明,1)棕色种子的渗透调节物质和受盐离子的毒害程度显著高于黑色种子;2)棕色种子萌发后,胚根和胚芽中Na+含量随NaCl浓度的增大显著增加,但胚根的增加量显著高于胚芽,而对于K+的含量没有显著影响;3)棕色种子萌发后,胚根的伸长速度、含水量显著高于胚芽,但胚芽干重显著高于胚根干重。结果表明,异子蓬二型性种子对盐胁迫体现出了不同的生理生化响应;棕色种子胚根和胚芽的相应变化都显示出了其能够在高盐胁迫下迅速萌发的超强适应能力。

Abstract: Suaeda aralocaspica is an annual halophyte species which is native to the Central Asian deserts. The dimorphic seeds of the studied species differ in seed color (black and brown). In order to discuss the response of the germination on dimorphic seeds of S. aralocaspica to salt stress,osmotic adjustment substances and the content of embryo Na+ and K+ under salt stress of dimorphic seeds were analyzed. For the brown seeds,the biomass,content of Na+ and K+ of the radicle and germ after germinated under different concentration of NaCl were tested. The osmotic adjustment substances and the degree of toxicity by saline ions of brown seeds were remarkable higher than that in black seeds. The Na+ content in radicle and germ of brown seeds were significantly increased with increasing of NaCl concentration,however,its increment in radicle is marked larger than germ. Salt stress had no effect on K+ content. The elongation speed and water content of radicle were significantly higher than germ in brown seeds,however the biomass of radicle and germ was on the contrary. In conclusion,dimorphic seeds of S. aralocaspica have different physiology and biochemistry response to salt stress. Responding to change in radicle and germ of brown seeds showed their super-strong adaptive capacity which will rapid germinate under high salinity stress.

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