干旱区生态环境知识资源中心(Arid): Effect of light on seed germination and seedling shape of succulent species from Mexico

Arid

	Effect of light on seed germination and seedling shape of succulent species from Mexico
	Joel Flores; Claudia Gonzalez Salvatierra; Enrique Jurado
来源期刊	Journal of Plant Ecology
ISSN	1752-9921
出版年	2016
卷号	9 期号:2 页码:174-179
英文摘要	Aims Light requirements for cactus seed germination have been considered to be associated with their adult plant height and seed mass, but this has not been thoroughly studied for other succulent species. In order to understand seed photosensitivity from desert species belonging to Asparagaceae(subfamily Agavoideae) and Cactaceae, we performed a germination experiment with and without light for 12 species and 2 varieties from 1 species from the Southern Chihuahuan Desert. We also determined if adult growth is totally determined by seedling growth form in cacti. Methods We performed a germination experiment using light and darkness for 13 species from Southern Chihuahuan Desert: 10 rosette species(Asparagaceae), as well as 1 globose, 1 columnar and 2 varieties from 1 depressed-globose species(Cactaceae). The response variables were seed germination percentage and relative light germination(RLG). In addition, in order to determine if adult-globose cacti could have cylindrical seedlings, we calculated the shape index(height/width ratio) for Coryphanta clavata and Mammillaria compressa. Important Findings All species were considered neutral photoblastic. Eleven species had similar seed germination in both light and dark conditions, and three taxa(M. compressa and the two varieties of Ferocactus latispinus) showed higher germination with light than without it. Agave salmiana, M. compressa and the two varieties of F. latispinus had higher RLG than the other species. Seed mass was an important factor because with higher seed mass there was lower dependence to light. These findings support the hypothesis that small seed mass and light requirements have coevolved as an adaptation to ensure germination. One adult-globose cactus species, M. compressa, and one adult-columnar species, C. clavata, had small seeds and neutral fotoblasticism. Seedlings from these two species exposed to light were cylindrical and those under darkness conditions were columnar. Perhaps seeds from this species are able to germinate in the dark because they produce columnar seedlings with the ability to emerge from greater soil depths where sunlight cannot penetrate.
英文关键词	Asparagaceae Cactaceae Chihuahuan Desert photoblasticism seed germination succulent plants
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5719513
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335653
作者单位	Joel Flores, Division de Ciencias Ambientales, Instituto Potosino de Investigacion Cientifica y Tecnologica, San Luis Potosi 78216, Mexico.; Claudia Gonzalez Salvatierra, Division de Ciencias Ambientales, Instituto Potosino de Investigacion Cientifica y Tecnologica, San Luis Potosi 78216, Mexico.; Enrique Jurado, Facultad de Ciencias Forestales, Universidad Autonoma de Nuevo Leon, Linares, 67700, Mexico.
推荐引用方式 GB/T 7714	Joel Flores,Claudia Gonzalez Salvatierra,Enrique Jurado. Effect of light on seed germination and seedling shape of succulent species from Mexico[J],2016,9(2):174-179.
APA	Joel Flores,Claudia Gonzalez Salvatierra,&Enrique Jurado.(2016).Effect of light on seed germination and seedling shape of succulent species from Mexico.Journal of Plant Ecology,9(2),174-179.
MLA	Joel Flores,et al."Effect of light on seed germination and seedling shape of succulent species from Mexico".Journal of Plant Ecology 9.2(2016):174-179.