干旱区生态环境知识资源中心(Arid): Germination response of four Arabian desert grasses to low water potential

Arid

DOI	10.1111/njb.02968
	Germination response of four Arabian desert grasses to low water potential
	Bhatt, Arvind; de Moura Souza-Filho, Paulo Roberto; Gallacher, David
通讯作者	Bhatt, A (corresponding author), Chinese Acad Sci, Lushan Bot Garden, Jiujiang, Peoples R China.
来源期刊	NORDIC JOURNAL OF BOTANY
ISSN	0107-055X
EISSN	1756-1051
出版年	2020
卷号	38 期号:12
英文摘要	Species that can germinate under low water potential are likely to have greater utility for fodder production and restoration in arid habitats. We investigated seed germination response of four native grass species (Panicum acuminatum, Panicum turgidum, Pennisetum divisum and Polypogon monspeliensis) to five osmotic potentials (0, -0.3, -0.6, -0.9 and -1.2 MPa) using polyethylene glycol-6000 and two light treatments (0, 12 h light per day). All the studied species exhibited high germination (> 77%) at psi = 0 MPa except P. turgidum (42%). Polypogon monspeliensis seeds did not show any significant reduction in germination from psi = 0 to -0.3 MPa (90-83%), but all other species did, averaging from 75.8 to 60.5%. At psi = -0.6 MPa seed germination was reduced to around 20%. Germination of most species was unaffected by light, but P. divisum seeds that germinated in darkness were more tolerant to water deficit. Reduction of water potential to -0.3 MPa inhibited the germination timing for P. acuminatum (ca 1.69 days difference to 50% germination [t50]), P. divisum (ca 1.56 day) and P. monspeliensis (ca 1.14 days). Germination of P. acuminatum and P. monspeliensis were similar after stressful exposure to all osmotic potentials, while for P. divisum there was reduced germination (85% at -0.6 MPa to 58% -1.2 MPa), indicating a dormancy induction. Tolerance to low water potentials, and response after release from these low potentials, indicates the species are adapted to survive in drier environments.
英文关键词	Arabian desert drought hydrotime PEG 6000 osmotic potential
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000604260600008
WOS关键词	SEED-GERMINATION ; HYDROTHERMAL-TIME ; DROUGHT STRESS ; NATIVE PLANTS ; TEMPERATURE ; SALINITY ; ECOSYSTEMS ; FABACEAE ; DORMANCY ; MODELS
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/2XILL650/349086
作者单位	[Bhatt, Arvind] Chinese Acad Sci, Lushan Bot Garden, Jiujiang, Peoples R China; [de Moura Souza-Filho, Paulo Roberto] Univ Fed Oeste Bahia, Ctr Multidisciplinar Barra, Barra, BA, Brazil; [Gallacher, David] Univ Sydney, Sch Life & Environm Sci, Narrabri, NSW, Australia
推荐引用方式 GB/T 7714	Bhatt, Arvind,de Moura Souza-Filho, Paulo Roberto,Gallacher, David. Germination response of four Arabian desert grasses to low water potential[J],2020,38(12).
APA	Bhatt, Arvind,de Moura Souza-Filho, Paulo Roberto,&Gallacher, David.(2020).Germination response of four Arabian desert grasses to low water potential.NORDIC JOURNAL OF BOTANY,38(12).
MLA	Bhatt, Arvind,et al."Germination response of four Arabian desert grasses to low water potential".NORDIC JOURNAL OF BOTANY 38.12(2020).