Microbiome analyses showed that fungi and bacteria cohabit in the plant environment. Separately they have been intensively studied for their ecology and impact on plant growth and health. Except some cases, little attention has however been paid to the intricacy of endosymbiotic fungi-bacteria associations.

Climate change and a rapidly growing world population are placing an ever-increasing pressure on the agricultural sector. In this context, green area index (GAI) monitoring plays an essential role in assessing the status and health of crops, making it a key source of information for farmers and decision-makers alike.

As climate change intensifies environmental stresses on crops, threatening global food security, exploring internal biological mechanisms that enhance plant resilience becomes increasingly critical. In this thesis, we investigated the role of seed-transmitted endophytic bacteria in increasing the resilience and health of Solanum lycopersicum, using a sterile hydroponic system.

This thesis comprehensively evaluates cattle ticks and acaricide resistance within Ecuador's cattle farms, looking for a One Health approach that integrates field surveys, laboratory analyses, and statistical modelling. A comprehensive literature review established the current understanding of Rhipicephalus microplus as a pest in Ecuador. Spatial distribution models for both R.

Climate change and increasing disturbances such as drought are threatening forest resilience worldwide. In this context, promoting specific and functional diversity in forests at the regional scale may be a key element to maintain their productivity, and foster their ability to cope with extreme events.

Phages are regaining interest in the context of the antimicrobial resistance crisis. To achieve their optimal use, understanding the fundamental mechanisms lying behind phage/host interactions is of prime importance. As the initial point of contact, the adsorption mechanism dictates the phage host spectrum through interaction between phage receptor binding proteins (RBP) and bacterial receptors.

Le séminaire se concentre sur la gouvernance agro-environnementale et comment elle contribue à l'atteinte des objectifs de protection de la biodiversité. Les résultats sont basés sur la collecte de données menée dans la région Hauts-de-France dans le cadre du projet Horizon ENFASYS, et elles se focalisent sur les MAEC en tant que subsides dans le cadre de la PAC.

My PhD study focuses on the response of global vegetation to orbital forcing, CO2, and ice sheets in previous interglacial periods, particularly MIS11 and MIS-13. The work is mostly based on climate model simulations. The impact of difference forcings and key mechanisms are investigated. Proxy records are also included in the study to compare with the modeling results.