干旱区生态环境知识资源中心(Arid): 几种荒漠植物种子萌发对干旱胁迫的响应及其抗旱性评价研究

Arid

	几种荒漠植物种子萌发对干旱胁迫的响应及其抗旱性评价研究
其他题名	Response to droughty stresses and drought-resistances evaluation of seed germination of four desert vegetation
	何芳兰; 赵明; 王继和; 尉秋实; 张锦春
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2011
卷号	34 期号:1 页码:100-106
中文摘要	以不同渗透势的PEG-6000溶液(0~-1.8 MPa)为模拟干旱胁迫条件,研究了盐爪爪(Kalidium foliatum),黑果枸杞(Lycium ruthenicum Murr),沙蒿(Artemisia arenaria)和油蒿(Artemisia ordosica)4种荒漠植物种子萌发及幼苗生长对干旱胁迫的响应.结果表明:干旱胁迫对4种荒漠植物种子萌发有显著的影响(P<0.05),盐爪爪种子萌发的最低渗透势阀值-1.5 MPa,苏枸杞,沙蒿和油蒿种子萌发的最低阀值均为-0.9 MPa;随着干旱胁迫的逐渐加剧,4种植物种子总萌发率,胚芽长度,初生根长度,幼苗鲜重及活力指数均呈下降趋势,并均小于对照;采用隶属函数法对干旱胁迫下4种植物的相对发芽率,相对萌发数,相对胚芽长度,相对初生根长度,相对幼苗鲜重,抗旱指数及相对活力指数进行综合评价,结果显示4种荒漠植物种子萌发阶段的抗旱性次序为:盐爪爪>沙蒿>油蒿>黑果枸杞
英文摘要	By the way of simulation drought, the seeds germination and seedling growth of four desert vegetations of Kalidium foliatum, Lycium ruthenicum, Artemisia arenaria and Artemisia ordosica were tested in distilled water appended PEG-6000(solution osmotic potentials were changed from 0 to-2.1 MPa), darkness and 25 ℃ for ten days. The results show that drought stress has a significant effect on seed germination and seedling growth of the four desert vegetations(P<0.05), and the lowest thresholds of osmotic potential for seed germination are-1.5 MPa in Kalidium foliatum and-0.9 MPa in Lycium ruthenicum, Artemisia arenaria and Artemisia ordosica. With the aggravating of drought stress, the total germination rates, plumule lengths, radical lengths, seedling fresh weights and vigor indexes of four desert vegetations are tended to decline, which are smaller than that of the comparison ones. The comprehensive evaluation of the relative seed germination rates, relative germination days, relative plumule lengths, relative radical lengths, relative seedling fresh weights, drought resistance indexes and relative vigor indexes of four vegetations by the average subordinative function method indicates that the drought resistances of the four vegetations are decreased in the order of Kalidium foliatum>Artemisia arenaria>Artemisia ordosica >Lycium ruthenicum. Basing on the studies and reported literature,it found that the extent of seed germination drought-resistance of desert vegetation in the condition of simulation drought could not exactly reveal tolerance-drought capability of their seed germination in the nature. And the adaptability of desert vegetations to drought not only depends on capability of drought-resistance, but also their drought-resistance mechanism. On the results and four vegetation habitats, the paper brought forward suggestions as follows: the capability and mechanism of drought-resistances of seed germination and seedling and transplant survival rates of species distributed in desert region should been studied together. Among the four vegetation, Kalidium foliatum is more suited to restore heavy salinization areas, and Artemisia arenaria is more fitted to restore serious sandy areas
中文关键词	荒漠植物 ; 干旱胁迫 ; 种子萌发 ; 抗旱性评价
英文关键词	desert vegetation drought stress seed germination drought resistance evaluation
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:4145114
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226437
作者单位	甘肃民勤荒漠草地生态系统国家野外科学观测研究站, 武威, 甘肃 733000, 中国
推荐引用方式 GB/T 7714	何芳兰,赵明,王继和,等. 几种荒漠植物种子萌发对干旱胁迫的响应及其抗旱性评价研究[J],2011,34(1):100-106.
APA	何芳兰,赵明,王继和,尉秋实,&张锦春.(2011).几种荒漠植物种子萌发对干旱胁迫的响应及其抗旱性评价研究.干旱区地理,34(1),100-106.
MLA	何芳兰,et al."几种荒漠植物种子萌发对干旱胁迫的响应及其抗旱性评价研究".干旱区地理 34.1(2011):100-106.