干旱区生态环境知识资源中心(Arid): Combined effect of temperature and water stress on seed germination of four Leptocereus spp. (Cactaceae) from Cuban dry forests

Arid

DOI	10.1111/1442-1984.12334
	Combined effect of temperature and water stress on seed germination of four Leptocereus spp. (Cactaceae) from Cuban dry forests
	Barrios, Duniel; Flores, Joel; Sanchez, Jorge A.; Gonzalez-Torres, Luis R.
通讯作者	Flores, J (corresponding author), IPICYT Environm Sci Div, San Luis Potosi, San Luis Potosi, Mexico.
来源期刊	PLANT SPECIES BIOLOGY
ISSN	0913-557X
EISSN	1442-1984
出版年	2021
英文摘要	Cactus seeds have developed adaptations to survive with high temperatures and low soil moisture in their habitats. We studied the effect of the combination of four water potentials (0, -0.2, -0.4 and -0.6 MPa) and two temperatures (25 degrees C and 35 degrees C) on germination and seedling mass of four endemic Leptocereus species from Cuba. There were two semi-arid coast species (L. arboreus and L. santamarinae) and two species inhabiting dry inland karstic hills (L. ekmanii and L. scopulophilus). We hypothesized that: (a) a decrease in water potential and an increase in temperature would result in low and slow germination, as well as in low seedling mass, and (b) ungerminated cactus seeds after exposure to combined water and temperature stress would have a high recovery capacity. The minimum time required for the seeds to start germination (Tmin), mean germination time (MGT) and germinability were evaluated. In addition, seed mass, the recovery after treatments of non-germinated seeds, and the seedling fresh mass obtained under different treatments were compared between species. In general, germination was only obtained at 25 degrees C and germinability and seedling mass were drastically affected by the reduction from 0 MPa to -0.2 MPa. Seeds showed thermoinhibition at 35 degrees C at all water potentials. There was a tendency to increase the MGT with decreasing water potential in three species. Low seed recovery occurred at all combined treatments for three species. If the predictions of increased temperature and decreased rainfall for the Caribbean region occur, a reduction in the germination of the Leptocereus species studied is expected.
英文关键词	high temperature seed recovery seedling performance water potential
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000650002400001
WOS关键词	SCOPULOPHILUS CACTACEAE ; DESERT ; CACTI ; RESPONSES ; SALINITY ; DORMANCY ; MATANZAS ; MUCILAGE ; ECOLOGY ; GROWTH
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352437
作者单位	[Barrios, Duniel] Univ La Habana, Natl Bot Garden, Havana, Cuba; [Flores, Joel] IPICYT Environm Sci Div, San Luis Potosi, San Luis Potosi, Mexico; [Sanchez, Jorge A.] Minist Sci Technol & Environm, Inst Ecol & Systemat, Havana, Cuba; [Gonzalez-Torres, Luis R.] Univ British Columbia, Dept Bot, Vancouver, BC, Canada
推荐引用方式 GB/T 7714	Barrios, Duniel,Flores, Joel,Sanchez, Jorge A.,et al. Combined effect of temperature and water stress on seed germination of four Leptocereus spp. (Cactaceae) from Cuban dry forests[J],2021.
APA	Barrios, Duniel,Flores, Joel,Sanchez, Jorge A.,&Gonzalez-Torres, Luis R..(2021).Combined effect of temperature and water stress on seed germination of four Leptocereus spp. (Cactaceae) from Cuban dry forests.PLANT SPECIES BIOLOGY.
MLA	Barrios, Duniel,et al."Combined effect of temperature and water stress on seed germination of four Leptocereus spp. (Cactaceae) from Cuban dry forests".PLANT SPECIES BIOLOGY (2021).