干旱区生态环境知识资源中心(Arid): Seed Weight and Trade-Offs: An Experiment in False Rhodes Grasses under Different Aridity Conditions

Arid

DOI	10.3390/plants11212887
	Seed Weight and Trade-Offs: An Experiment in False Rhodes Grasses under Different Aridity Conditions
	Marinoni, Lorena; Zabala, Juan M.; Quiroga, R. Emiliano; Richard, Geraldina A.; Pensiero, Jose F.
通讯作者	Marinoni, L
来源期刊	PLANTS-BASEL
ISSN	2223-7747
出版年	2022
卷号	11 期号:21
英文摘要	The false Rhodes grasses [Leptochloa crinita (Lag.) P.M. Peterson and N.W. Snow and Leptochloa pluriflora (E. Fourn.) P.M. Peterson and N.W. Snow] are considered valuable native forage resources for arid and semiarid rangelands in Argentina and the United States. Effectively using plant materials as forage under aridity conditions requires understanding their resource allocation under those conditions. In the present study, plant functional traits were evaluated in six populations of each false Rhodes grass species from different geographic origin in a humid and an arid region. The evaluation was focused on seed weight, due to the key role of this trait in plant survival. The implication of seed weight in germination under osmotic stress and trade-off relationships between functional traits were also analysed. A fixed ontogenetic variation was found in both species, since populations maintained a stable seed weight across environments. The tolerance to osmotic stress at germination stage was more related to seed weight than to population origin or maternal environment of seeds; heavier-seeded populations produced heavier seedlings instead of a higher number of germinated seeds or higher germination rates. Some traits varied between environments but other traits exhibited a fixed response. Variation patterns among populations were similar within environments and in some cases even for populations from the same geographic origin, revealing a fixed ontogenetic variation; this phenomenon was clearer in L. crinita than in L. pluriflora. Moreover, several different trade-off strategies were detected in both species. These results reinforce the knowledge about the key role of seed weight in survival and performance of seedlings at initial growth stages under arid conditions; however, at advanced stages, other traits would have an important function in growth and development of false Rhodes grasses.
英文关键词	germination plant functional traits Leptochloa crinita L. pluriflora local adaptation
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000882276000001
WOS关键词	TRICHLORIS-CRINITA POACEAE ; WATER-USE STRATEGIES ; FORAGE GRASS ; BIOMASS PRODUCTION ; 3 VARIETIES ; PLANT ; SIZE ; GERMINATION ; TRAITS ; RESISTANCE
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/2XILL650/394010
推荐引用方式 GB/T 7714	Marinoni, Lorena,Zabala, Juan M.,Quiroga, R. Emiliano,et al. Seed Weight and Trade-Offs: An Experiment in False Rhodes Grasses under Different Aridity Conditions[J],2022,11(21).
APA	Marinoni, Lorena,Zabala, Juan M.,Quiroga, R. Emiliano,Richard, Geraldina A.,&Pensiero, Jose F..(2022).Seed Weight and Trade-Offs: An Experiment in False Rhodes Grasses under Different Aridity Conditions.PLANTS-BASEL,11(21).
MLA	Marinoni, Lorena,et al."Seed Weight and Trade-Offs: An Experiment in False Rhodes Grasses under Different Aridity Conditions".PLANTS-BASEL 11.21(2022).