H2020Индивидуална стипендия2020–2022

Microsyndia · Close encounters in the phycosphere: Microscale syntrophic interactions between diatom and diazotroph populations

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

Период: 2020-08-01 → 2022-07-31
Финансиране от ЕС: 191 149 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Взаимоотношенията между едноклетъчни водорасли и бактерии в океана се проучват, например как бактериите осигуряват витамини и хранителни вещества на водораслите. Това помага да се разбере как се установяват тези връзки и как те влияят върху растежа на организмите в морските екосистеми.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

Close encounters in the phycosphere: Microscale syntrophic interactions between diatom and diazotroph populations

Marine unicellular algae, also named phytoplankton, are key to the world’s oxygen production and are also de basis of the oceans’ ecosystems. These tiny creatures, however, do not exist on their own, but are surrounded instead by bacteria that can influence their activity: some can be pathogenic, but many are also beneficial, and can enhance their productivity in difficult conditions. It is very likely that the interactions between bacteria and unicellular algae are species-specific. However, in highly diluted aquatic environments (such as the open ocean), it is not understood how these interactions are established. This project focuses on those interactions that can alleviate a nutritional need for the algae, e.g., by bacterial supply of nutrients or vitamins in a nutrient-diluted environment. In particular, it addresses the spatial dynamics of bacteria and microalgae over time with the aim to understand 1) how these associations are established and 2) to quantify the consequences (in terms of growth and activity of both bacteria and algae) of these interactions. A parallel goal of the MSCA Individual Fellowship is to foster the development of the individual researcher.

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

Цел на проекта

Bacterial interactions with eukaryotic phytoplankton are ubiquitous in marine ecosystems. The basis of many of these interactions is a reciprocal exchange of metabolites that mutually benefits the organisms involved. Under diffusion limitation, such relationships typically require close spatial coupling between the two partners. How long these intimate interactions must endure for a sustained exchange to occur is unclear and challenges our judgement of what truly constitutes a symbiosis.Understanding the dynamics of syntrophic interactions is essential to understand the impact of bacterial communities in marine biogeochemical cycles. With this proposal, I intend to evaluate the potential role of diazotrophic bacteria in alleviating the nutrient demands of algae in nitrogen-limited environments.To achieve this, I plan to establish a model microbial system with a marine heterotrophic diazotroph, which has an obligate dependency on photosynthetically fixed carbon, and a diatom, which relies on nitrogen fixed by the diazotroph. I will construct a microfluidic bioreactor to enable detailed monitoring of the spatiotemporal distribution of bacteria and diatom cells during long-term culturing. Integrating this microenvironment with stable-isotope probing and Raman microscopy will allow me to quantify carbon and nitrogen uptake and transfer rates between partners. By relating microbial behaviour to single-cell activity rates, this project will offer invaluable information connecting the structure, dynamics and function of microbial consortia, and thereby provide robust insights into the basal ecological functioning that supports aquatic ecosystems.

Оригинален текст от CORDIS (на английски).

Участници

EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH · ZuerichКоординаторШвейцария