干旱区生态环境知识资源中心(Arid): Germination temperatures and seed dormancy of two Larrea species (Zygophyllaceae) from the Monte Desert, Argentina

Arid

	Germination temperatures and seed dormancy of two Larrea species (Zygophyllaceae) from the Monte Desert, Argentina
	Emilia Fernandez, Maria 1; Anibal Cony, Mariano 1; Bernardo Passera, Carlos 2
通讯作者	Emilia Fernandez, Maria
来源期刊	REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS
EISSN	1853-8665
出版年	2019
卷号	51 期号:2 页码:235-247
英文摘要	The genus Larrea includes five species of desert shrubs distributed along the American Continent. These species produce dormant mature seeds, but the type of dormancy and the factors that produce it have been poorly assessed. The objective of this work was to determine the optimum germination temperatures of L. cuneifolia and L. nitida, to analyze the response to pre-germination treatments, and to evaluate the type of seed dormancy these species have. Seeds were incubated at five constant temperatures and were subjected to mechanical scarification and rinsed with running water to break dormancy. Seed coat permeability and the presence of water-soluble germination inhibitors were also assessed. The optimum germination temperature range was between 15-40 degrees C for both species. A positive response to all pre-germination treatments was observed in L. cuneifolia (37-47%), while L. nitida showed higher germination percentage only with mechanical scarification (73%). Both species presented water-permeable seed coats, ruling out the occurrence of a physical dormancy. The inhibitory test of seed-coat extracts was positive for L cuneifolia, suggesting the possible presence of a chemical dormancy. These results are valuable for conservation purposes and directly contribute to improving production of seedlings required for restoration projects.
英文关键词	germination inhibitors Larrea cuneifolia Larrea nitida optimum temperature physical dormancy
类型	Article
语种	英语
国家	Argentina
收录类别	SCI-E
WOS记录号	WOS:000502257700018
WOS关键词	WATER-STRESS ; TRIDENTATA ; PATTERNS ; BIOLOGY
WOS类目	Agriculture, Multidisciplinary
WOS研究方向	Agriculture
EI主题词	2019-12-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311031
作者单位	1.Consejo Nacl Invest Cient & Tecn, CCT Mendoza, Inst Argentino Invest Zonas Aridas IADIZA, Ruiz Leal S-N,Parque Gral San Martin,CC 507, RA-5500 Mendoza, Argentina; 2.Univ Nacl Cuyo, Fac Ciencias Agr, Catedra Fisiol Vegetal, Almirante Brown 500,CPA M5528AHB, Mendoza, Argentina
推荐引用方式 GB/T 7714	Emilia Fernandez, Maria,Anibal Cony, Mariano,Bernardo Passera, Carlos. Germination temperatures and seed dormancy of two Larrea species (Zygophyllaceae) from the Monte Desert, Argentina[J],2019,51(2):235-247.
APA	Emilia Fernandez, Maria,Anibal Cony, Mariano,&Bernardo Passera, Carlos.(2019).Germination temperatures and seed dormancy of two Larrea species (Zygophyllaceae) from the Monte Desert, Argentina.REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS,51(2),235-247.
MLA	Emilia Fernandez, Maria,et al."Germination temperatures and seed dormancy of two Larrea species (Zygophyllaceae) from the Monte Desert, Argentina".REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS 51.2(2019):235-247.