Agustín Javier Marín Peña

Universidad del País Vasco / Euskal Herriko Unibertsitatea | UPV/EHU · Vegetal Biology and Ecology

Iron (Fe) is a micronutrient that is essential for plant growth and development as well as for crop productivity and the quality of their derived products. Despite its high abundance in Earth’s crust, Fe is poorly available to plants in one-third of the cultivated land. This is because at neutral to alkaline pH, Fe is mostly present in the form of...

Plant growth and development depends on sufficient nutrient availability in soils. Agricultural soils are generally nitrogen (N) deficient and thus, soils need to be supplemented with fertilizers. Ammonium (NH4 +) is a major inorganic N source. However, at high concentrations ammonium nutrition becomes a stress situation that inhibits plant growth....

Plants encounter a myriad of microorganisms at the root-soil interface that can invade with detrimental or beneficial outcomes. Promoting a symbiotic relationship may interfere with the restriction responses to pathogens. In this study, we established a tripartite Medicago truncatula (Mt)-Sinorhizobium meliloti (Sm)-Fusarium oxysporum (Fo) interact...

Plants encounter a myriad of microorganisms at the root-soil interface that can invade with detrimental or beneficial outcomes. Promoting a symbiotic relationship may interfere with the restriction responses to pathogens. In this study, we established a tripartite Medicago truncatula- Sinorhizobium meliloti-Fusarium oxysporum interaction to study t...

Polyamines (PAs) are ubiquitous low molecular weight, molecules found in all living cells with participation in a variety of processes. The establishment of symbiotic interactions between soil nitrogen fixing bacteria (rhizobia) and leguminous plants, as well as the formation of the root nodules where the rhizobia are hosted, depends on the product...

Most plants species develop stress symptoms when exposed to high ammonium (NH4 +) concentrations. Root is the first organ in contact with high NH4 + and therefore the first barrier to cope with ammonium stress. In this work, we focused on root adaptation to ammonium nutrition in the model plant Brachypodium distachyon. Proteome analysis evidenced c...

Although ammonium (NH4⁺) is a key intermediate of plant nitrogen metabolism, high concentrations of NH4⁺ in the soil provoke physiological disorders that lead to the development of stress symptoms. Ammonium nutrition was shown to induce the accumulation of glucosinolates (GSLs) in leaves of different Brassicaceae species. To further understand the...

The SARS-CoV-2 pandemic has evolved far more aggressively in countries lacking a robust testing strategy to identify infected individuals. Given the global demand for fast and reliable diagnosis to determine the carrier individuals, a stock-out scenario for a number of essential reagents/kits used along the diagnostic process has been foreseen by m...

Polyamines (PAs) are hormonal compounds and growth regulators, with low molecular weight, aliphatic nature, and polycationic character at physiological pH, present in different types of organisms and particularly in plants, where they are involved in the regulation of various physiological processes related to growth and development as well as in r...

Polyamines (PAs) are small nitrogen polycationic compounds involved in the response to salinity as well as in biotic interactions. Legumes are salt sensitive species characterised by their ability to establish symbiotic interactions with nitrogen fixing bacteria known as rhizobia that colonize the roots inducing the formation of nodules where the n...

Polyamines (PAs) such as spermidine (Spd) and spermine (Spm) are small ubiquitous polycationic compounds that contribute to plant adaptation to salt stress. The positive effect of PAs has been associated to a cross-talk with other anti-stress hormones such as brassinoesteroids (BRs), also involved in anti-stress responses in plants. In this work we...