干旱区生态环境知识资源中心(Arid): Response of F. arundinacea seed germination to temperatures, water potentials, and priming treatments using hydro-and thermal-time models

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DOI	10.1007/s12298-022-01229-w
	Response of F. arundinacea seed germination to temperatures, water potentials, and priming treatments using hydro-and thermal-time models
	Mamedi, Arash; Salehi, Parvin; Divargar, Fatemeh
通讯作者	Mamedi, A
来源期刊	PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS
ISSN	0971-5894
EISSN	0974-0430
出版年	2022
卷号	28 期号:8 页码:1545-1558
英文摘要	The germination process and seedling development are the determining steps in the plant lifecycle that are the most sensitive to adverse environmental conditions. Therefore, this study was conducted to explore the effects of temperature and osmotic potential on germination responses using threshold models and to establish an optimal priming protocol for improving tolerance responses against osmotic stress in early growth stages. The results demonstrated that osmotic stress of - 0.8 MPa significantly influenced the extent, timing, and speed of seed germination. In addition, priming treatments led to an enhanced performance of early growth stages in response to osmotic stress. Based on thermal-time and hydro-time models, the predicted physiological parameters of the median thermal-time at sub-optimal temperature (theta(T(50)) = 909.09 degrees C h), the median ceiling temperature for 50% germination (T-c(50) = 39.29 degrees C), the common base temperature (T-b =7.88 degrees C), the constant thermal-time at supra-optimal temperature (theta(T) =805.96 degrees C h), the threshold water potential (Psi(b(50)) = -1.13 MPa), and the hydrotime constant (theta(H) =56.09 MPa h) quantitatively describe the tolerance threshold of the germination process under different osmotic and temperature conditions. The results also showed that the efficiency of seed treatments depended on the priming conditions, including temperature, duration, and also concentration of the priming agent. However, the treatments of gibberellic acid (5 days, 10 degrees C, 100 ppm), salicylic acid (5 days, 10 degrees C, 50 ppm), calcium chloride (3 days, 10 degrees C, 10 mM), potassium nitrate (3 days, 10 degrees C, 100 mM), and hydro-priming (3 days, 10 degrees C) were optimal protocols of each priming method, resulting in an increased seed vigor under osmotic stress. Hence, the predicted biological parameters could easily be applied to determine the physiological changes of germination under environmental factors over time. Also, results suggest that recommended osmo-, hydro-, and hormonal-priming treatments could be efficient methods for ameliorating the osmotic tolerance in the post-priming stages of this plant, especially in arid lands.
英文关键词	Osmotic stress Base-temperature Ceiling-temperature Seedling growth Osmo-priming Hormonal-priming Hydro-priming
类型	Article
语种	英语
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000854392400001
WOS关键词	CARDINAL TEMPERATURES ; STRESS TOLERANCE ; SATIVA L. ; SALINITY ; POPULATIONS ; PERFORMANCE ; EMERGENCE ; GROWTH ; ACID ; QUANTIFICATION
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393947
推荐引用方式 GB/T 7714	Mamedi, Arash,Salehi, Parvin,Divargar, Fatemeh. Response of F. arundinacea seed germination to temperatures, water potentials, and priming treatments using hydro-and thermal-time models[J],2022,28(8):1545-1558.
APA	Mamedi, Arash,Salehi, Parvin,&Divargar, Fatemeh.(2022).Response of F. arundinacea seed germination to temperatures, water potentials, and priming treatments using hydro-and thermal-time models.PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS,28(8),1545-1558.
MLA	Mamedi, Arash,et al."Response of F. arundinacea seed germination to temperatures, water potentials, and priming treatments using hydro-and thermal-time models".PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS 28.8(2022):1545-1558.