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Genetic Diversity and Differentiation of Juniperus thurifera in Spain and Moroc...
Teixeira, Helena; Rodríguez-Echeverría, Susana; Nabais, CristinaJuniperus thurifera L. is an important tree endemic to the western Mediterranean basin that it is able to grow in semi-arid climates. It nowadays exhibits a disjunct distribution pattern, occurring in North Africa, Spain, France and the Italian Alps. The Strait of Gibraltar has acted as an efficient barrier against gene flow between African and European populations, which are considered different subspecies by ...
No allelopathic effect of the invader Acacia dealbata on the potential infectiv...
Lorenzo, Paula; Rodríguez-Echeverría, Susana; Freitas, H.The invasion success of the leguminous tree Acacia dealbata Link has been related to the release of novel chemical compounds that affect both native plant performance and native soil bacterial communities. However, the allelopathic effect of A. dealbata on arbuscular mycorrhizal fungi (AMF) has not been explored. We used natural leachates from invasive A. dealbata and native soils to assess the bioactivity of t...
Developmentally-programmed division of labour in the clonal invader Carpobrotus...
Roiloa, Sergio R.; Rodríguez-Echeverría, Susana; Freitas, H.; Retuerto, RubénInvasive species are one of the main causes for the loss of global biodiversity. However, the mechanisms that explain the success of invasive species remain unsolved. Clonal growth has been pointed out as an attribute that could contribute to the invasiveness of plants, however little research has been conducted to determine the importance of clonal traits in successful invaders. One of the most interesting att...
Can root-feeders alter the composition of AMF communities? Experimental evidenc...
Rodríguez-Echeverría, Susana; de la Peña, Eduardo; Moens, Maurice; Freitas, Helena; van der Putten, Wim H.Root herbivores and plant mutualists, such as arbuscular mycorrhizal fungi (AMF), have a significant effect on the structure and dynamic of plant communities. Nevertheless, the interactions between the two groups of organisms in natural ecosystems are far from understood. We carried out an inoculation experiment to examine the effect of two root herbivores, Pratylenchus penetrans and P. dunensis (Nematoda), on ...
Arbuscular mycorrhizal fungi of Ammophila arenaria (L.) Link: Spore abundance a...
Rodríguez-Echeverría, Susana; Hol, W.H. Gera; Freitas, Helena; Eason, William R.; Cook, RogerArbuscular mycorrhizal fungi (AMF) are common organisms in the rhizhosphere of plants in coastal sand dunes where they play a key role in the establishment, growth and survival of plants. This study presents a quantitative analysis of the AMF associated with Ammophila arenaria, the most important sand-fixing species in the foredunes of Europe, in six locations along the western European coast. Spore abundance a...
Belowground mutualists and the invasive ability of Acacia longifolia in coasta...
Rodríguez-Echeverría, Susana; Crisóstomo, João; Nabais, Cristina; Freitas, HelenaThe ability to form symbiotic associations with soil microorganisms and the consequences for plant growth were studied for three woody legumes grown in five different soils of a Portuguese coastal dune system. Seedlings of the invasive Acacia longifolia and the natives Ulex europaeus and Cytisus grandiflorus were planted in the five soil types in which at least one of these species appear in the studied coastal...
Genetic diversity of rhizobia associated with Acacia longifolia in two stages o...
Rodríguez-Echeverría, Susana; Crisóstomo, João A.; Freitas, HelenaWe examined the genetic diversity of root nodule bacteria associated with the Australian legume Acacia longifolia in two stages of invasion of a coastal sand dune system. All isolates belonged to the genus Bradyrhizobium. A higher diversity was found in the long-established trees. The results suggest the introduction of exotic bradyrhizobia with the plant
Diversity of AMF associated with Ammophila arenaria ssp. arundinacea in Portugu...
Rodríguez-Echeverría, Susana; Freitas, HelenaAbstract Dune vegetation is essential for the formation and preservation of sand dunes and the protection of the coast line. Coastal sand dunes are harsh environments where arbuscular mycorrhizal fungi (AMF) play an important role in promoting plant establishment and growth. We present a study of the diversity of AMF associated with A. arenaria ssp. arundinacea in two locations of the Portuguese coast under a ...
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