Increased tolerance to hidric stress of Lavandula dentata plants by the application of autochthonous microorganisms and compost.

Resumen del póster presentado a la Saclay Plánt Sciences (SPS) Conference, celebrada en Evry (Francia) del 4 al 6 de julio de 2013.Drought stress is one of the most important abiotic factors limiting plant growth and performance in large areas of the Southeast of Spain. Limitation of water causes a series of detrimental changes in plant nutrition and plant physiology. Specific soil microbial communities tend to develop a series of activities of great importance, in uptake of nutrients and water that improved plant growth and the quality of the soil. As result of the application of autochthonous arbuscular mycorrhizal fungi (AMF) and compost (C) increased the plant growth under natural drought conditions. The inoculation of native bacteria Bacillus thuringiensis (B.t) also was highly effective. As mechanisms of protection of Lavandula den tata to drought-induced dehydration (45-50% whc) , the treatments applied as B.t or C reduced antioxidants enzymatic activities as APX, GR and proline, which indicate that these plants are suffering a lower stress. Simple B.t inoculation increases the content ofK, and C and AMF increases P and K while the coinoculation with B.t and AMF promotes P, K, Ca, Mg uptake. Therefore, the interaction of plants with beneficial soil microorganisms and compost can increase drought adaptation and plant tolerance to nutrients and water shortages.Peer reviewe