干旱区生态环境知识资源中心(Arid): 异子蓬二型性种子萌发对盐胁迫的响应

Arid

	异子蓬二型性种子萌发对盐胁迫的响应
其他题名	Responses of the germination on dimorphic seeds of Suaeda aralocaspica to salt stress
	宋以刚 1; 李利 1; 曾歆花 2; 邓敏 3; 张希明1
来源期刊	草业学报
ISSN	1004-5759
出版年	2014
卷号	23 期号:1 页码:192-198
中文摘要	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。
英文摘要	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.
中文关键词	适应性 ; 一年生盐生植物 ; 荒漠区系 ; 种子异型性 ; 异子蓬
英文关键词	adaptability annual halophyte plant desert region seed heteromorphism Suaeda aralocaspica
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:5056978
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230859
作者单位	1.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国; 2.中国科学院遗传与发育生物学研究所农业资源研究中心, 石家庄, 河北 050021, 中国; 3.中国科学院上海辰山植物科学研究中心, 上海 201602, 中国
推荐引用方式 GB/T 7714	宋以刚,李利,曾歆花,等. 异子蓬二型性种子萌发对盐胁迫的响应[J]. 中国科学院新疆生态与地理研究所,2014,23(1):192-198.
APA	宋以刚,李利,曾歆花,邓敏,&张希明.(2014).异子蓬二型性种子萌发对盐胁迫的响应.草业学报,23(1),192-198.
MLA	宋以刚,et al."异子蓬二型性种子萌发对盐胁迫的响应".草业学报 23.1(2014):192-198.