干旱区生态环境知识资源中心(Arid): Effect of temperature, salinity and water potential on seed germination of annual grass Stipa capensis

Arid

DOI	10.1080/15324982.2024.2383938
	Effect of temperature, salinity and water potential on seed germination of annual grass Stipa capensis
	Fakhfakh, Lobna Mnif; Abassi, Siwar; Chaieb, Mohamed
通讯作者	Fakhfakh, LM
来源期刊	ARID LAND RESEARCH AND MANAGEMENT
ISSN	1532-4982
EISSN	1532-4990
出版年	2024
英文摘要	The effect of water stress, salinity and temperature on the germination of Stipa capensis seeds were estimated herein. Seed germination was determined over different temperatures (10 degrees C, 15 degrees C, 20 degrees C, 25 degrees C and 30 degrees C), across a range of osmotic potentials of the polyethylene glycol solutions (0.0; -0.2; -0.5; -0.8; -1.6 MPa) and four salinity levels (0, 50; 100; 150 mmol/l(-1)) in four replicates of 50 caryopses for a period of 20 d. Results showed that temperature significantly affected the germinative percentage of Stipa capensis seeds (p < .001). The optimum temperature was 20 degrees C. The final germination percentage increased at the sub-optimal temperature range (10 degrees C-20 degrees C). However, from 20 to 30 degrees C, the final germination percentage decreased. The base temperature (Tb) was thus determined at 11.36 degrees C and the ceiling temperature (Tc) at 31.55 degrees C. Moreover, the highest germination percentage was found in osmotic potential 0 MPa (81 +/- 2.4%). The increase in PEG(6000) concentration resulted in an important decrease of germination percentage, with only 40% of seeds germinating at 0.8 MPa. Stipa capensis was also sensitive to high salinity (150 mmol/l(-1)) with a 29 +/- 1.5 germination percentage. Overall, the study has shown the ability of Stipa capensis seed to germinate under low temperatures, water and salt stress that characterize most arid and semi-arid regions.
英文关键词	Germination salinity stipa capensis temperature thermal time model water stress
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001282307800001
WOS关键词	PLANT FUNCTIONAL TYPES ; HYDROTHERMAL TIME ; COMMUNITY COMPOSITION ; TENACISSIMA L. ; RESPONSES ; LIGHT ; DYNAMICS ; STRESS ; DESERT ; VEGETATION
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/402951
推荐引用方式 GB/T 7714	Fakhfakh, Lobna Mnif,Abassi, Siwar,Chaieb, Mohamed. Effect of temperature, salinity and water potential on seed germination of annual grass Stipa capensis[J],2024.
APA	Fakhfakh, Lobna Mnif,Abassi, Siwar,&Chaieb, Mohamed.(2024).Effect of temperature, salinity and water potential on seed germination of annual grass Stipa capensis.ARID LAND RESEARCH AND MANAGEMENT.
MLA	Fakhfakh, Lobna Mnif,et al."Effect of temperature, salinity and water potential on seed germination of annual grass Stipa capensis".ARID LAND RESEARCH AND MANAGEMENT (2024).