干旱区生态环境知识资源中心(Arid): Modeling the influence of temperature and water potential on seed germination of Allium tenuissimum L.

Arid

DOI	10.7717/peerj.8866
	Modeling the influence of temperature and water potential on seed germination of Allium tenuissimum L.
	Xiao, Hong 1; Yang, Helong 1; Monaco, Thomas 2; Song, Qian 1; Rong, Yuping 1
通讯作者	Rong, Yuping
来源期刊	PEERJ
ISSN	2167-8359
出版年	2020
卷号	8
英文摘要	Allium tenuissimum L. is a widely distributed perennial herbaceous species in temperate and desert steppes. Relative to other wild Allium species, it produces unique sweet flavors, more biomass in arid and cold environments, and has generated greater interest for crop production. Successful crop establishment, however, will depend on rapid and uniform seed germination. Our study aimed to characterize seed germination of A. tenuissimum under various temperature regimes (11, 15, 20, 24 and 28 degrees C) and water potential levels (0, -0.2, -0.4 and -0.6 MPa), and model germination by hydrotime (HT) and hydrothermal time (HTT) analysis. Final germination percentage (FGP) increased within the range of 11 to 20 degrees C, yet it declined within the range of 24 to 28 degrees C and generally decreased as water potential became more negative within each temperature setting. Maximum FGP was observed at 20 degrees C at all water potential settings and ranged from 55.0 +/- 5.3 to 94.8 +/- 1.4%. According to HT and HTT models, the base (T-b) and optimum temperatures (T-o) for seed germination were 7.0 and 20.5 degrees C, respectively. In addition, base water potential for the fraction of germination within the seed lot (psi(b)(g)) shifted to 0 MPa as temperature increased from T-b to ceiling temperature (T-c). For obtaining 50 % seed germination, psi(b)(50) and T-c (50) were estimated to be -0.67 MPa and 27.2 degrees C, respectively. These values for Tb and psi(b)(50) suggest seed germination of A. tenuissimum is both cold and drought tolerant and suitable for production in semi-arid regions. Our characterization of the ideal sowing conditions for A. tenuissimum, i.e., 20.5 degrees C and soil water potential less negative than -0.67 MPa offers information to forecast suitable settings to enhance crop production.
英文关键词	Seed germination Allium tenuissimum Drought tolerant Crop production Hydrothermal time model
类型	Article
语种	英语
国家	Peoples R China ; USA
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000524282000003
WOS关键词	HYDROTHERMAL TIME MODEL ; CARDINAL TEMPERATURES ; QUANTIFICATION ; THERMOINHIBITION ; RESPONSES ; EXPLAINS ; STRESS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315298
作者单位	1.China Agr Univ, Coll Grassland Sci & Technol, Beijing Key Lab Grassland Sci, Beijing, Peoples R China; 2.Utah State Univ, USDA ARS Forage & Range Res Lab, Logan, UT 84322 USA
推荐引用方式 GB/T 7714	Xiao, Hong,Yang, Helong,Monaco, Thomas,et al. Modeling the influence of temperature and water potential on seed germination of Allium tenuissimum L.[J]. 中国农业大学,2020,8.
APA	Xiao, Hong,Yang, Helong,Monaco, Thomas,Song, Qian,&Rong, Yuping.(2020).Modeling the influence of temperature and water potential on seed germination of Allium tenuissimum L..PEERJ,8.
MLA	Xiao, Hong,et al."Modeling the influence of temperature and water potential on seed germination of Allium tenuissimum L.".PEERJ 8(2020).