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- Studies on the diversity of arbuscular mycorrhizal fungi and the efficacy of two native isolates in a highly alkaline anthropogenic sedimentPublication . Oliveira, R. S.; Vosátka, M.; Dodd, J. C.; Castro, P. M. L.A field survey of the arbuscular mycorrhizal status of herbaceous plant species was conducted in a highly alkaline anthropogenic sediment resulting from the disposal of waste from an acetylene and polyvinyl chloride factory. Most plant species found at the site were mycorrhizal and the dominant mycotrophic plant species was Conyza bilbaoana. Fungal species richness was assessed by identification of spores extracted from the sediment and from continuously propagated trap pot cultures. All of the six species of arbuscular mycorrhizal fungi (AMF) found were from the genus Glomus. Glomus intraradices and G. mosseae were found in field-collected sediment samples and also occurred most frequently in trap cultures. To test the symbiotic effectiveness of these two fungi, seedlings of C. bilbaoana were inoculated with either native G. intraradices BEG163 or G. mosseae BEG198 and non-native G. intraradices BEG75 or G. mosseae BEG25 isolates in sterile and non-sterile sediment collected from the study site. All four isolates were able to colonise C. bilbaoana. However, AMF native to the target sediments were generally more effective than the non-native fungi in promoting plant establishment and growth under highly alkaline conditions. The non-native G. intraradices was, however, more effective than the non-native G. mosseae. The results of this study suggest the use of adapted AMF as inoculants for phytorestoration of alkaline anthropogenic-stressed sediments.
- Phytoremediation as a biotechnological tool for environmental restorationPublication . Marques, Ana P. G. C.; Rangel, António O. S. S.; Calheiros, Cristina S. C.; Oliveira, Rui S.; Franco, Albina R.; Vosatka, Miroslav; Dodd, John C.
- Use of different types of plants for the uptake of contaminantsPublication . Calheiros, Cristina S.C.; Marques, Ana P. G. C.; Oliveira, Rui S.; Rangel, António O. S. S.; Castro, Paula M. L.
- Phytoextraction of Zn by Solanum nigrum: effect of chelating agents (EDTA and EDDS) addition and inoculation with arbuscular mycorrhizal fungiPublication . Marques, Ana P. G. C.; Oliveira, Rui S.; Rangel, António O. S. S.; Castro, Paula M. L.
- The mycorrhizal status of Phragmites australis in several polluted soils and sediments of an industrialised region of Northern PortugalPublication . Oliveira, R.S.; Dodd, J.C.; Castro, Paula M. L.Roots of Phragmites australis from three polluted soils and sediments (a periodically flooded stream bank containing organic pollutants, a high-pH drying sedimentation pond and an acidic, periodically flooded sand polluted by industrial effluents) were sampled over a 1-year cycle of plant growth to assess the degree of colonisation by arbuscular mycorrhizal fungi (AMF). At the dry sedimentation pond, root samples of Juncus effusus and Salix atrocinerea were also taken to assess the presence of AMF throughout the year. Root colonisation was low (<5% root length colonised) but arbuscule presence peaked in P. australis during the spring and autumn prior to flowering. These changes in arbuscule abundance were also seen in a parallel greenhouse trial using seed taken from one of the sites. Roots of J. effusus contained mainly vesicular colonisation but arbuscule activity peaked during the winter months (December–March). S. atrocinerea roots were found to be ectomycorrhizal throughout the year but the fine feeder roots were colonised by AMF. The results confirm that semi-aquatics, like P. australis, can become arbuscular mycorrhizal but that this status changes during the year depending on soil moisture content and plant phenology. The influence of AMF in these polluted soils is uncertain but the potential exists to establish a more diverse plant ecosystem during the landscaping of these areas (phytostabilisation) by management of adapted plant and AMF ecotypes.
- Fate of pollutants in the plant / rhizosphere system:Fundamental aspects and their significance for field applications – Prospects and research needsPublication . Marques, Ana P. G. C.; Oliveira, Rui S.; Rangel, António O. S. S.; Castro, Paula M. L.
- Application of manure and compost to contaminated soils and its effect on zinc accumulation by Solanum nigrum inoculated with arbuscular mycorrhizal fungiPublication . Marques, Ana P. G. C.; Oliveira, Rui S.; Rangel, António O. S. S.; Castro, Paula M. L.
- Zinc accumulation and histolocalisation in Solanum nigrum grown in contaminated soil: effect of arbuscular mycorrhizal fungi.Publication . Marques, Ana P. G. C.; Samardjieva, Kalina A; Oliveira, Rui S.; Pissarra, José; Rangel, António O. S. S.; Castro, Paula M. L.
- Zinc uptake by Solanum nigrum with the assistance of arbuscular mychorrizal fungiPublication . Marques, Ana P. G. C.; Oliveira, Rui S.; Rangel, António O. S. S.; Castro, Paula M. L.
- Application of manure and compost to contaminated soils and its effect on zinc accumulation by Solanum nigrum inoculated with arbuscular mycorrhizal fungiPublication . Marques, Ana P. G. C.; Oliveira, Rui S.; Rangel, António O.S.S.; Castro, Paula M. L.