caa a22 4500 475751477 CHVBK 20180406123525.0 cr unu---uuuuu 170329e20000501xx s 000 0 eng 10.1023/A:1009848215019 doi (NATIONALLICENCE)springer-10.1023/A:1009848215019 Inhibitory effects of Artemisia herba-alba on the germination of the gypsophyte Helianthemum squamatum [Elektronische Daten] [Adrián Escudero, María Albert, José Pita, Félix Pérez-García] The potential allelopathic role of Artemisia herba-alba has been evaluated in order to explain the community pattern of the gypsum semiarid environments of central Spain. This pattern shows a sharp ecotone between a gypsophile sparse shrubby community dominated by Helianthemum squamatum, which grows on slopes with gypsum surface crusts, and a nitrohalophilous community on the gypsum alluvial soils of piedmont dominated by Artemisia herba-alba. In order to explain this pattern, resource limitation was discarded because no significant differences in several soil parametrers, but fine earth fraction and organic matter content, had been detected in a previous study. Results confirm the inhibitory effect of aqueous extracts on the final germination percentage of scarified seeds of Helianthemum squamatum and also on the shape of the germination curves, which indicate delay of germination for the aqueous extracts. Assays with soil of the Artemisiacommunity (three types) showed that germination was strongly inhibited in soils obtained below the canopy of mature plants (litter maintained) and retarded in the other treatments. We suggest that the spatial community pattern detected in this gypsum environment and characterised by a sharp ecotone could be at least partially controlled by interference through allelopathy. This determines the excliusion of Helianthemum squamatum plants from alluvial soils. Kluwer Academic Publishers, 2000 Allelopathy nationallicence Aquaeous extracts nationallicence Gypsiferous community pattern nationallicence Gypsum environment nationallicence Sharp ecotone nationallicence Seed scarification nationallicence Escudero Adrián Departamento de Biología Vegetal, Escuela Universitaria de Ingeniería Técnica Agrícola, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, E-28040, Madrid, Spain aut Albert María Departamento de Biología Vegetal, Escuela Universitaria de Ingeniería Técnica Agrícola, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, E-28040, Madrid, Spain aut Pita José Departamento de Biología Vegetal, Escuela Universitaria de Ingeniería Técnica Agrícola, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, E-28040, Madrid, Spain aut Pérez-García Félix Departamento de Biología Vegetal, Escuela Universitaria de Ingeniería Técnica Agrícola, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, E-28040, Madrid, Spain aut Plant Ecology Kluwer Academic Publishers 148/1(2000-05-01), 71-80 1385-0237 148:1<71 2000 148 11258 https://doi.org/10.1023/A:1009848215019 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1009848215019 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Escudero Adrián Departamento de Biología Vegetal, Escuela Universitaria de Ingeniería Técnica Agrícola, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, E-28040, Madrid, Spain aut NATIONALLICENCE 700 1- Albert María Departamento de Biología Vegetal, Escuela Universitaria de Ingeniería Técnica Agrícola, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, E-28040, Madrid, Spain aut NATIONALLICENCE 700 1- Pita José Departamento de Biología Vegetal, Escuela Universitaria de Ingeniería Técnica Agrícola, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, E-28040, Madrid, Spain aut NATIONALLICENCE 700 1- Pérez-García Félix Departamento de Biología Vegetal, Escuela Universitaria de Ingeniería Técnica Agrícola, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, E-28040, Madrid, Spain aut NATIONALLICENCE 773 0- Plant Ecology Kluwer Academic Publishers 148/1(2000-05-01), 71-80 1385-0237 148:1<71 2000 148 11258 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer