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Intact extraradical mycelium - a strategy for arbuscular mycorrhizal fungi in a...
Brito, Isabel; Carvalho, Mário; Alho, Luís; Caseiro, Mariline; Goss, Michael J.Arbuscular mycorrhiza are known to contribute to host plant P acquisition and protection against both biotic and abiotic stresses. However the practical exploitation of this mutualistic relationship is rarely considered in agricultural systems, allegedly owing to the cost of inoculation and the requirement for timely colonisation. AMF colonisation starting from an intact extra-radical mycelium (ERM) takes plac...
Soil and weed management for enhancing arbuscular mycorrhiza colonisation of wheat
Brito, Isabel; Carvalho, Mário; Goss, Michael J.Tillage and weed control are critical components of cropping systems that need to be combined such that crops benefit from reduced competition. However, weeds may also contribute to the biological diversity within the agro-environment. This greenhouse study investigated whether common weeds of arable cropping systems were suitable host plants for arbuscular mycorrhizal fungi (AMF), allowing the development of e...
Practical exploitation of mycorrhizal fungi in agricultural systems
Brito, Isabel; Carvalho, Mário; Alho, Luís; Goss, Michael J.Improving the sustainability of agricultural systems requires a more efficacious use of soil resources. Mycorrhizas are known to contribute to host plant P acquisition and protection against both biotic and abiotic stresses, such as soil-borne diseases and toxic metal ions. However, practical exploitation of the mutualistic relationship is rarely considered in agricultural systems, allegedly owing to the cost o...
WEED MANAGEMENT UNDER NO-TILL TO INCREASE THE BENEFITS OF THE TRIPARTITE SYMBIOSIS
Alho, Luis; Carvalho, Mário; Goss, Michael; Brito, IsabelIn southern regions of Europe subclover (Trifolium subterraneum L.), inoculated with rhizobia, is commonly sown in acid soils that are marginal for arable crop production. The rate of success of these pastures is small both in terms of plant growth and nodulation with the introduced rhizobia. Manganese toxicity is frequently considered to be a contributory factor. Nevertheless, other native legumes, particularl...
Impact of tillage system on arbuscular mycorrhiza fungal communities in the soi...
Brito, Isabel; Goss, Michael J.; Carvalho, Mário; Chatagnier, Odile; van Tuinen, DiederichA more diverse arbuscular mycorrhiza (AM) fungal community should be more versatile and resilient to variation in environmental conditions over space and time. To evaluate the effect of no-till and conventional tillage systems, AM fungal diversity was assessed as part of a long term field experiment by sequencing of DNA, extracted from soil, that encoded the large ribosomal sub-unit and was obtained by nested-P...
Effect of tillage and crop on arbuscular mycorrhiza
Brito, Isabel; Goss, Michael J.; Carvalho, MárioLarge-scale inoculation with arbuscular mycorrhizal fungi (AMF) is generally impractical in most regions and we have little understanding of the factors that determine inoculation success. Nevertheless, the ability to take full advantage of indigenous AMF for sustainable production needs to be developed within cropping systems. We used part of a long-term field experiment to understand the influence of tillage ...
NO-TILL PROVIDES THE OPPORTUNITY TO MANAGE UNDERGROUND INTERACTIONS BETWEEN ARB...
Brito, Isabel; Carvalho, Mário; Goss, Michael J.; Alho, LuísEarly colonization of crop roots by arbuscular mycorrhiza (AM) is considered beneficial but its importance likely depends on the possible stresses faced by the host plant. Manganese toxicity is one such stress that AM can alleviate. Colonization initiated by extraradical mycelium (ERM) is faster than other sources of inoculum. No-till creates the possibility of encouraging inoculation via this source. At seedin...
Mudar trajetórias de vida : escola de segunda oportunidade : o caso da Escola d...
Brito, Isabel Maria Lagarto deO estudo que suporta o presente trabalho consiste, essencialmente, numa análise e consequente reflexão sobre o programa e as metodologias utilizadas na Escola de Segunda Oportunidade de Matosinhos. O programa de intervenção da escola e as suas metodologias diferenciadas, pretende ser uma oferta de certificação e de orientação formativa para um grupo de alunos com problemas de insucesso escolar e integração soci...
Using Constraints for Intrusion Detection: The NeMODe System
Salgueiro, Pedro; Diaz, Daniel; Brito, Isabel; Abreu, SalvadorIn this work we present NeMODe a declarative system for Computer Network Intrusion detection which provides a declarative Do- main Specific Language for describing computer network intrusion signa- tures that could spread across several network packets, which allows to state constraints over network packets, describing relations between sev- eral packets, and providing several back-end detection mechanisms whic...
Summer survival of arbuscular mycorrhiza extraradical mycelium and the potentia...
Brito, Isabel; Carvalho, Mário; Goss, Michael J.The potential to manage arbuscular mycorrhizal (AM) colonisation within Mediterranean agricultural systems likely depends on the summer survival of the extraradical mycelium. To investigate this further a three-stage experiment was undertaken. The first stage was the creation of two contrasting levels of extraradical mycelium development, achieved by two contrasting levels of soil disturbance (typifying full ti...
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