干旱区生态环境知识资源中心(Arid): Summer annual plants exhibit germination responses to an aridity gradient consistent with both delayed germination and phenotypic plasticity

Arid

DOI	10.1007/s11258-020-01077-2
	Summer annual plants exhibit germination responses to an aridity gradient consistent with both delayed germination and phenotypic plasticity
	Lopez, Ramiro Pablo; Hayes, Mayli; Maidana-Tuco, Yamil; Naoki, Kazuya
通讯作者	Lopez, RP
来源期刊	PLANT ECOLOGY
ISSN	1385-0237
EISSN	1573-5052
出版年	2020
卷号	221 期号:12 页码:1233-1242
英文摘要	Two adaptive strategies to face variable environments have been proposed for annual plants in deserts: delayed and plastic (predictive) germination. All theories and models have been formulated based on studies on winter annuals, although half of the world deserts have summer annuals. We conducted an experiment to quantify the response of summer annual communities located along an altitudinal gradient (proxy for aridity gradient) to simulated precipitation levels. We expected to find increasingly lower germination fractions (more conservative) as we moved from the highest (less arid) area to the lowest (more arid) area, and also higher germination thresholds in the more arid end of the gradient. The experiment was implemented with two variables: altitude (2900, 3150, 3400 and 3600 m a.s.l.) and simulated precipitation (20, 40, 60, and 80 mm). The full generalized linear model showed that the number of seedlings was related to precipitation, altitude, and their interaction. The number of seedlings was positively related to the precipitation: more seedlings germinated in the less arid sites, and their slopes were steeper, suggesting stronger effects of precipitation in less arid areas. These results supported our first prediction: seed banks from the drier area tend to have more conservative germination responses. We also found a plastic behavior in all four altitudes. Our results show that summer-annuals may utilize both survival strategies as a way to cope with environmental uncertainty.
英文关键词	Germination thresholds Plastic germination Seed banks Summer-rain deserts
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000568458600001
WOS关键词	SEED SIZE ; OPTIMIZING REPRODUCTION ; DESERT ANNUALS ; EMPIRICAL-TEST ; LONG-TERM ; DISPERSAL ; WINTER ; ADAPTATIONS ; POPULATION ; STRATEGIES
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326194
作者单位	[Lopez, Ramiro Pablo; Hayes, Mayli; Maidana-Tuco, Yamil] Univ Mayor San Andres, Carrera Biol, Calle 27 Cota Cota, La Paz, Bolivia; [Lopez, Ramiro Pablo] Univ Mayor San Andres, Herbario Nacl Bolivia, Calle 27 Cota Cota, La Paz, Bolivia; [Lopez, Ramiro Pablo; Naoki, Kazuya] Univ Mayor San Andres, Inst Ecol, Calle 27 Cota Cota, La Paz, Bolivia
推荐引用方式 GB/T 7714	Lopez, Ramiro Pablo,Hayes, Mayli,Maidana-Tuco, Yamil,et al. Summer annual plants exhibit germination responses to an aridity gradient consistent with both delayed germination and phenotypic plasticity[J],2020,221(12):1233-1242.
APA	Lopez, Ramiro Pablo,Hayes, Mayli,Maidana-Tuco, Yamil,&Naoki, Kazuya.(2020).Summer annual plants exhibit germination responses to an aridity gradient consistent with both delayed germination and phenotypic plasticity.PLANT ECOLOGY,221(12),1233-1242.
MLA	Lopez, Ramiro Pablo,et al."Summer annual plants exhibit germination responses to an aridity gradient consistent with both delayed germination and phenotypic plasticity".PLANT ECOLOGY 221.12(2020):1233-1242.