干旱区生态环境知识资源中心(Arid): Drought tolerance of three ethnomedicinal shrubs evaluated based on their seed germination rates at different drought levels induced by using polyethylene glycol (PEG(6000))

Arid

DOI	10.2478/foecol-2021-0006
	Drought tolerance of three ethnomedicinal shrubs evaluated based on their seed germination rates at different drought levels induced by using polyethylene glycol (PEG(6000))
	Dadach, Mohammed; Mehdadi, Zoheir
通讯作者	Dadach, M (corresponding author), Univ Bejaia, Fac Sci Nat & Vie, Lab Rech Ecol & Environm, Bejaia 06000, Algeria.
来源期刊	FOLIA OECOLOGICA
ISSN	1336-5266
EISSN	1338-7014
出版年	2021
卷号	48 期号:1 页码:49-54
英文摘要	Sideritis incana, Stachys ocymastrum, and Thymus fontariesil are medicinal plants belonging to the Lamiaceae family and occurring in semi-arid lands in northern Algeria and in many other countries along the Mediterranean coastline. Despite the ecological and economic interests and also the questionable future these species may meet in their natural habitats, various aspects of their seed biology have not been recognised to this date. This study was intended for in situ conservation of these plants. The problem investigated was the germination response of seeds to different water potential levels attained with using different amounts of polyethylene glycol (PEG(6000)) (0, -0.03, -0.07, -0.2, -0.5, -1 and -1.6 MPa). In this way, the appropriate conditions and the threshold tolerance of seed germination against water stress were assessed. Seeds of the three species lacked primary/innate dormancy and they geminated abundant and fast in distilled water (S. incana - 65%; S. ocymastrum - 60% and 7: fontanseii - 90%). Small seeds of 7: fontanesii tolerated more water stress and germinated under up to -1 MPa (-10 bars). Large seeds of S. incana and S. ocymastrum, however, were more sensitive to the drought stress and germinated only under -0.5 MPa (-5 bars). Moreover, more studied parameters were found developing negative reponse under rising drought stress, such as postponed triggering of seed germination, decreased germination velocity and prolonged germination duration, as well as the average time of germination. Therefore, these three plants appear to postpone their establishment until arrival of conditions promising for germination, including sufficient rainfall.
英文关键词	germination Lamiaceae polyethylene glycol water stress
类型	Article
语种	英语
开放获取类型	gold
收录类别	ESCI
WOS记录号	WOS:000663799800006
WOS关键词	TEMPERATURE ; BIODIVERSITY ; SALINITY ; GROWTH ; L.
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352811
作者单位	[Dadach, Mohammed] Univ Bejaia, Fac Sci Nat & Vie, Lab Rech Ecol & Environm, Bejaia 06000, Algeria; [Mehdadi, Zoheir] Univ Djillali Liabes Sidi Bel Abbes, Fac Nat Sci & Life, Lab Plant Biodivers Conservat & Valorizat, Sidi Bel Abbes 22000, Algeria
推荐引用方式 GB/T 7714	Dadach, Mohammed,Mehdadi, Zoheir. Drought tolerance of three ethnomedicinal shrubs evaluated based on their seed germination rates at different drought levels induced by using polyethylene glycol (PEG(6000))[J],2021,48(1):49-54.
APA	Dadach, Mohammed,&Mehdadi, Zoheir.(2021).Drought tolerance of three ethnomedicinal shrubs evaluated based on their seed germination rates at different drought levels induced by using polyethylene glycol (PEG(6000)).FOLIA OECOLOGICA,48(1),49-54.
MLA	Dadach, Mohammed,et al."Drought tolerance of three ethnomedicinal shrubs evaluated based on their seed germination rates at different drought levels induced by using polyethylene glycol (PEG(6000))".FOLIA OECOLOGICA 48.1(2021):49-54.