干旱区生态环境知识资源中心(Arid): Quantification of Retama raetam seed germination response to temperature and water potential using hydrothermal time concept

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DOI	10.1016/j.envexpbot.2018.10.014
	Quantification of Retama raetam seed germination response to temperature and water potential using hydrothermal time concept
	Abdellaoui, Raoudha 1; Boughalleb, Faycal 1; Zayoud, Dhikra 1,2; Neffati, Mohamed 1; Bakhshandeh, Esmaeil 3,4
通讯作者	Abdellaoui, Raoudha
来源期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
EISSN	1873-7307
出版年	2019
卷号	157 页码:211-216
英文摘要	Retama raetam (Forssk Webb; Fabaceae) is a xerophytic shrub that is distributed from northern to southern Tunisia and which is of interest for medical use and for revegetation. To quantify seed germination responses of R. raetam to temperature (T) and water potential (psi), and to determine cardinal Ts, a hydrothermal time model (HTT) was used. The experiment was conducted at six constant Ts (5, 10, 15, 20, 25, and 30 degrees C) at each of the following psi s (0, -0.3, -0.7 and -1 MPa; provided by PEG 6000). Results showed that germination rate (GR) and germination percentage (GP) were significantly influenced by psi, T and their interactions (P < 0.01). Cardinal Ts for R. raetam was 4.2 degrees C for T-b (the base T), 17 degrees C for T-o (the optimum T) and 30 degrees C for T-c (the ceiling T) in the control condition (0 MPa). The T-d (the T at which psi(b(50)) starts to change) was estimated to be 10 degrees C. By increasing T to T-o, hydrotime constant (theta(H)) decreased nonlinearly and then stabilized to 30 MPa degrees C h at Ts ranging from 15 to 30 degrees C. The study showed that when the HTT model is applied, it can accurately describe the time course of germination across all Ts and psi s for this plant (R-2 = 0.90). Moreover, estimated parameters using HTT model were 388.6 MPa degrees C h for the hydrothermal time constant (theta(HTT)), -0.913 MPa for the base water potential (psi(b(50)))and 0.047 MPa degrees C h for the k(T) (the slope of the relationship between psi(b(50)) and T >= T-d). The parameters presented in this study can easily be used in R. raetam SG simulation models for characterizing the physiological status of R. raetam seed populations and also for predicting germination time courses of this plant under different environmental conditions.
英文关键词	Germination Temperature Water potential Hydrothermal time model Retama raetam
类型	Article
语种	英语
国家	Tunisia ; Iran
收录类别	SCI-E
WOS记录号	WOS:000454465500021
WOS关键词	ANTIOXIDANT ACTIVITIES ; CARDINAL TEMPERATURES ; FORSSK. WEBB ; L. ; MODELS ; DESERT ; ANTIBACTERIAL ; REQUIREMENTS ; ANTIFUNGAL ; FLAVONOIDS
WOS类目	Plant Sciences ; Environmental Sciences
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215384
作者单位	1.Univ Gabes, Lab Ecosyst Pastoraux & Valorisat Plantes Spontan, Inst Reg Arides, Medenine 4119, Tunisia; 2.Fac Sci Tunis, Dept Biol, Tunis 1060, Tunisia; 3.Genet & Agr Biotechnol Inst Tabarestan, POB 578, Sari 4818168984, Iran; 4.Sari Agr Sci & Nat Resources Univ, POB 578, Sari 4818168984, Iran
推荐引用方式 GB/T 7714	Abdellaoui, Raoudha,Boughalleb, Faycal,Zayoud, Dhikra,et al. Quantification of Retama raetam seed germination response to temperature and water potential using hydrothermal time concept[J],2019,157:211-216.
APA	Abdellaoui, Raoudha,Boughalleb, Faycal,Zayoud, Dhikra,Neffati, Mohamed,&Bakhshandeh, Esmaeil.(2019).Quantification of Retama raetam seed germination response to temperature and water potential using hydrothermal time concept.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,157,211-216.
MLA	Abdellaoui, Raoudha,et al."Quantification of Retama raetam seed germination response to temperature and water potential using hydrothermal time concept".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 157(2019):211-216.