干旱区生态环境知识资源中心(Arid): 几种锦鸡儿属植物种子硬实特性及萌发对温度和水势的响应

Arid

	几种锦鸡儿属植物种子硬实特性及萌发对温度和水势的响应
其他题名	Seed dormancy and germination characteristics of several species of the Caragana genus
	袁祯; 陈大立; 罗鑫萍; 杨凌杰; 胡小文
来源期刊	草业科学
ISSN	1001-0629
出版年	2019
卷号	36 期号:11 页码:2820-2830
中文摘要	分布于温带地区的大部分豆科植物其种子普遍存在硬实特性。除种子自生遗传基础外,种子硬实特性还受其生长发育的环境条件所调控,而对来自同一生境的植物种子,在属内水平系统的研究其硬实特性以及种子萌发对环境因子的响应鲜有报道。因此,以15种豆科锦鸡儿属(Caragana)植物种子为材料,研究了其硬实特性以及种子萌发对温度和水势的响应。结果表明,1)参试15种锦鸡儿属植物中,除荒漠锦鸡儿(C. roborovskyi)和刺叶锦鸡儿(C. acanthophylla)硬实率分别为63%和14%外,其他13种物种硬实率均较低(< 10%)或不存在硬实特性;2)室内贮藏半年(6个月)不同程度地降低了所有锦鸡儿属植物种子的硬实率,如荒漠锦鸡儿种子硬实率由63%显著下降至37% (P<0.05); 3)参试9种锦鸡儿属植物种子萌发率、萌发指数均随温度上升表现出先上升而后下降的趋势,其能萌发的温度范围与温度阈值因种而异,如柠条锦鸡儿(C. korshinskii)种子最耐高温;4)参试6种锦鸡儿属植物种子萌发率、萌发指数均随水势胁迫程度增加呈下降趋势,但其对水势胁迫的耐受性因种而异,其中红花锦鸡儿(C.rosea)种子最耐旱。因此大部分锦鸡儿属植物种子不存在硬实特性,且室温贮藏显著影响种子硬实率的评价,以后的研究中应予以考虑。
英文摘要	The majority of legumes in the temperate zone have water-impermeable seeds; however, little is known about seed dormancy and the response of seed germination to environmental factors, such as temperature and water potential. Thus, the seed dormancy and germination in response to temperature and water potential in 15 Caragana species were studied. The results showed that: 1) the percentage of hard seeds in Caragana roborovskyi and C. acanthophylla was 63% and 14%, respectively, while this was lower than 10% or absent in the other species. 2) Dry storage significantly decreased the percentage of hard seeds of the tested species to various degrees (P < 0.05). For example, the hard seed percentage of C. roborovskyi decreased from 63% to 37%. 3) With an increase in temperature, the germination percentage and germination index increased and then decreased. The germination range and temperature threshold varied according to the species. 4) The germination percentage and germination index of all species decreased with a decrease in water potential, while their sensitivity to water stress varied according to the species. Thus, the seeds of most Caragana species were permeable to water, and dry storage at room conditions significantly decreased the number of hard seeds, which should. be considered during future studies.
中文关键词	锦鸡儿属 ; 硬实 ; 种子萌发 ; 温度 ; 水势胁迫
英文关键词	Caragana hard seeds seed germination temperature water potential
语种	中文
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6621137
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/2XILL650/316073
作者单位	兰州大学草地农业科技学院, 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, 甘肃 730020, 中国
推荐引用方式 GB/T 7714	袁祯,陈大立,罗鑫萍,等. 几种锦鸡儿属植物种子硬实特性及萌发对温度和水势的响应[J]. 兰州大学,2019,36(11):2820-2830.
APA	袁祯,陈大立,罗鑫萍,杨凌杰,&胡小文.(2019).几种锦鸡儿属植物种子硬实特性及萌发对温度和水势的响应.草业科学,36(11),2820-2830.
MLA	袁祯,et al."几种锦鸡儿属植物种子硬实特性及萌发对温度和水势的响应".草业科学 36.11(2019):2820-2830.