干旱区生态环境知识资源中心(Arid): Priming effects on seed germination and seedling vigour in two perennial grasses targeted for degraded arid ecosystem restoration

Arid

DOI	10.1007/s12224-022-09417-y
	Priming effects on seed germination and seedling vigour in two perennial grasses targeted for degraded arid ecosystem restoration
	Hamdani, Marwa; Krichen, Khouloud; Chaieb, Mohamed
通讯作者	Chaieb, M
来源期刊	FOLIA GEOBOTANICA
ISSN	1211-9520
EISSN	1874-9348
出版年	2022
卷号	57 期号:3 页码:181-200
英文摘要	Restoration practices in arid ecosystems based on native species are urgently required to face desertification. In this context, knowledge about germination of species of arid ecosystems and seed enhancement technologies, such as seed priming to improve plant establishment, could be a basis to plan a restoration project. We assessed the effect of priming treatments to enhance germination in Stipa lagascae and Cenchrus ciliaris. Pretreated S. lagascae and C. ciliaris seeds (two levels of hydropriming, osmopriming and hardening) were subjected to diverse temperatures (20 degrees C, 25 degrees C and 30 degrees C) and increasing drought stress levels (psi w: -0.3 to -2 MPa). The priming tools, successfully implemented, enhanced seed and seedling performance. Hardened and osmoprimed C. ciliaris and S. lagascae seeds were found to germinate the most at 25 degrees C and 20 degrees C, up to about 96.7% and 90.84%, respectively. At psi w = -1.6 MPa, no seed germination was observed in the two species in all priming pre-treatments. Pretreated grass seedlings exhibited sturdy strategies (seedling vigour up to 343), great plasticity (RDPI over 0.5) and a significant resource use efficiency. The hydrotime model analysis showed that priming slightly aids seeds of the two species in germination under lower water potential. In conclusion, priming could be a useful tool to improve germination rates, seedling establishment and plasticity under stressful drought conditions. Considering these results in the field of seed-based restoration and the identification of the most urgent research lines is paramount to guide the restoration practices.
英文关键词	Perennial grasses Arid land Seed priming Seedling vigour Hydrotime model Abiotic stress
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000862217700001
WOS关键词	WATER RELATIONS ; SUPPORT AVAILABILITY ; HYDROTHERMAL TIME ; BUFFEL GRASS ; PLASTICITY ; GROWTH ; L. ; ESTABLISHMENT ; POPULATION ; EMERGENCE
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/2XILL650/392590
推荐引用方式 GB/T 7714	Hamdani, Marwa,Krichen, Khouloud,Chaieb, Mohamed. Priming effects on seed germination and seedling vigour in two perennial grasses targeted for degraded arid ecosystem restoration[J],2022,57(3):181-200.
APA	Hamdani, Marwa,Krichen, Khouloud,&Chaieb, Mohamed.(2022).Priming effects on seed germination and seedling vigour in two perennial grasses targeted for degraded arid ecosystem restoration.FOLIA GEOBOTANICA,57(3),181-200.
MLA	Hamdani, Marwa,et al."Priming effects on seed germination and seedling vigour in two perennial grasses targeted for degraded arid ecosystem restoration".FOLIA GEOBOTANICA 57.3(2022):181-200.