干旱区生态环境知识资源中心(Arid): 青海野决明、芒颖大麦草和盐生草种子萌发对盐分和干旱胁迫的响应特征

Arid

	青海野决明、芒颖大麦草和盐生草种子萌发对盐分和干旱胁迫的响应特征
其他题名	Seed germination response characteristics of Thermopsis przewalskii,Hordeum jubatum, and Halogeton glomeratus under salt and drought stresses
	邹凯 1; 王绿菁 1; 王嘉茜 1; 睢峥岩 1; 曾彦军 2
来源期刊	草业科学
ISSN	1001-0629
出版年	2018
卷号	35 期号:12 页码:2883-2892
中文摘要	以采集于甘肃省境内的青海野决明(Thermopsis przewalskii)、芒颖大麦草(Halogeton glomeratus)和盐生草(Hordeum jubatum)种子为材料,调查了模拟盐分(NaCl溶液)和干旱(聚乙二醇溶液)胁迫条件下种子萌发情况。结果显示,3种种子的最终萌发率(FGP)均随盐分和干旱胁迫的加剧呈下降趋势,初始萌发时间呈延迟趋势,平均萌发时间呈延长趋势。盐分胁迫条件下,青海野决明、芒颖大麦草和盐生草种子的FGP均以对照和轻度胁迫条件(-0.6~-0.3MPa)下为高,最高FGP依次为97%、86%和76%,萌发耐盐极限值分别出现在-2.1、-2.1和-3.3MPa左右,耐盐指数分别为0.76、0.70和0.84。干旱胁迫条件下,青海野决明、芒颖大麦草和盐生草种子FGP分别在-0.3~ 0MPa、0MPa和-2.1~0MPa渗透势条件下为最高,分别为97%、76%和68%,萌发耐旱极限值分别出现在-2.4、-2.4和-3.5MPa左右,耐旱指数分别为0.71、0.72和0.88。
英文摘要	The seeds used in this study were collected from Thermopsis przewalskii,Hordeum jubatum,and Halogeton glomeratus growing in the desert region of Gansu Province.Seed germination characteristics under salinity and drought stress[imposed by increasing concentrations of sodium chloride(NaCl)and polyethylene glycol(PEG),respectively]were investigated.The results showed that,with the osmotic potentials of solutions of NaCl and PEG decreasing,the final germination percentages(FGP)of the tested seeds of the three species decreased,initial dates of germination were delayed,and mean germination time was prolonged. T.przewalskii,H.jubatum,and H.glomeratus showed the highest FGP values(97%,86%,and 76%) when treated with 0,-0.3,-0.6MPa solutions of NaCl(salinity stress;P<0.05,N=4),respectively. The critical osmotic potentials of NaCl solution under which seeds could germinate were-2.1,-2.1,and-3.3MPa,respectively.The values of salinity tolerance indices were 0.76,0.70,and 0.84,respectively.T. przewalskii,H.jubatum,and H.glomeratus showed the highest FGP values(97%,76%,and 68%)when treated with-0.3~0MPa,0MPa,and-2.1~0MPa solutions of PEG(drought stress),respectively.The critical osmotic potentials of PEG solution under which seeds could germinate were-2.4,-2.4,and-3.5 MPa,respectively.The values of drought tolerance indices were 0.71,0.72,and 0.88,respectively.
中文关键词	盐分胁迫 ; 干旱胁迫 ; 萌发率 ; 平均萌发时间 ; 初生根芽比 ; 耐盐/旱指数
英文关键词	salt stress drought stress germination mean germination time ratio of root length and shoot length salinity/drought tolerance index
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:6399694
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237341
作者单位	1.兰州大学草业科学国家级实验教学示范中心/兰州大学草地农业科技学院, 兰州, 甘肃 730020, 中国; 2.兰州大学草业科学国家级实验教学示范中心/兰州大学草地农业科技学院;;兰州大学;;草地农业生态系统国家重点实验室, ;;农业农村部草牧业创新重点实验室;;草地农业生态系统国家重点实验室, 兰州;;兰州;;兰州, 甘肃;;甘肃;;甘肃 730020;;730020;;730020, 中国
推荐引用方式 GB/T 7714	邹凯,王绿菁,王嘉茜,等. 青海野决明、芒颖大麦草和盐生草种子萌发对盐分和干旱胁迫的响应特征[J]. 兰州大学,2018,35(12):2883-2892.
APA	邹凯,王绿菁,王嘉茜,睢峥岩,&曾彦军.(2018).青海野决明、芒颖大麦草和盐生草种子萌发对盐分和干旱胁迫的响应特征.草业科学,35(12),2883-2892.
MLA	邹凯,et al."青海野决明、芒颖大麦草和盐生草种子萌发对盐分和干旱胁迫的响应特征".草业科学 35.12(2018):2883-2892.