H2020Индивидуална стипендия2021–2022

BIOTAC · Soil bioremediation through flagellated bacteria: unravelling the mechanisms for enhancing bacterial tactic response

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2021-01-01 → 2022-12-31
Финансиране от ЕС: 160 932 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Бактерии с опашки (флагели) се изследват за това как се придвижват в почвата, за да достигнат до токсични органични химикали. Това помага за разработването на по-ефективни методи за почистване на замърсените почви чрез микроорганизми.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Soil bioremediation through flagellated bacteria: unravelling the mechanisms for enhancing bacterial tactic response

Soils are extremely complex, heterogeneous and evolving ecosystems with essential functions for the development of life and human activities. They are non-renewable resources at the human time scale, and its preservation is then a synonym of biosphere protection. Chemical pollution is one of the main causes of deterioration of soil ecosystem services and a severe environmental problem at a global scale with significant ecological risks. Pollution of soils with hydrophobic organic chemicals (HOCs) is of special concern due to their high toxicity and persistence. Microbial communities are the main drivers of soil ecological functioning, and the exploitation of their specific capabilities in bioremediation is a low-impact and cost-effective strategy to restore ecosystem services and soil functionality in polluted environments. Bacterial dispersal has a significant impact on pollutant turnover in contaminated soils. Flagellated bacteria able to degrade organic pollutants, hold tactic responses to a variety of stimuli and reach pollutant hotspots, enhancing the access to poorly bioavailable carbon sources by steepening pollutant concentration gradients at interfaces. However, bacterial motility in porous media is often restricted due to high cell deposition rates and adhesion to soil particles, and in this sense, the modulating role of biological and chemical effectors is decisive. The main objective of BIOTAC was the study of the microbiological mechanisms involved in the bioavailability enhancement and turnover of HOCs in soils through microbial dispersal, and their application for the development of innovative soil bioremediation strategies based on the enhancement of pollutant biodegradation through the improvement of the transport of bacteria towards pollutant hotspots. BIOTAC results could be used as a powerful tool to unravel the mechanisms that promote pollutant turnover and to select the best actions to improve these “hidden” microscale processes, and apply them for the restoration and risk reduction in degraded soils.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Bacterial dispersal is a key driver of pollutant turnover in contaminated soils. Flagellated bacteria able to degrade organic pollutants hold tactic responses to a variety of stimuli and reach pollutant hotspots, enhancing the access to poorly bioavailable carbon sources by steepening pollutant concentration gradients at interfaces. However, bacterial motility in porous media is often restricted due to high cell deposition rates and adhesion to soil particles, and in this sense, the modulating role of biological and chemical effectors is decisive. The aim of BIOTAC is the study of the mechanisms operating with flagellated bacteria for bioavailability enhancements and, therefore, a faster turnover of persistent organic pollutants in soils, including polycyclic aromatic hydrocarbons and a pesticide, lindane. We will study, at the microorganism scale, the role of bacterial taxis in chemical gradients (chemotaxis), as well as other tactic responses (repellence, surface taxis) in pollutant bioavailability, modelling and integrating them with other microbial adaptations (i.e. biofilm formation and the production of biosurfactants). We will develop strategies to improve bacterial transport to pollutant sources, using carefully selected biological and chemical effectors (respectively including, mycelial networks and organic compounds -root exudates, humic acids, and fertilizers), that favour flagella-mediated taxis, and co-mobilization of immotile degrading strains. The originality and innovation of the project lies on the macroscale projection of the microscale mechanisms underlying the access of self-propelled bacteria to limitedly available contaminants through an enhanced dispersal. Through experimental and modelling approaches, aiming at balancing biosorption and colloidal transport of the pollutants against biodegradation rates, the project will perform a risk and benefit analysis of the new bioremediation technology.

Оригинален текст от CORDIS (на английски).

Участници

AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS · MadridКоординаторИспания