Introduction

Hi, welcome to my blog. This platform will be used as a tool to diffuse my academic projects, thoughts and experiments, starting with a description of my Ph.D. project (http://kembellab.ca) and of my ongoing Postdoctoral fellowship with Dr. Marie-Claire Arrieta at the University of Calgary. DSC_0016 Bacteria and fungi colonize almost all plant surfaces and tissues, from the roots (rhizosphere) to the leaves (phyllosphere). The diversity of these communities regulates several ecosystem functions, principally through its implication in enzymatic processes (nutritional, defensive and biochemical). Microorganisms are characterized by a high surface/volume, rapid growth and short generation time, allowing microbes to respond quickly to any environmental modifications. Every change in microbial biomass, metabolic activity or community structure could be considered the beginning of a global ecosystem change. Since 2000, a major revolution has affected microbial studies as the development of high-throughput sequencing methods has freed researchers from culture-dependent methods that limited census sampling depth and quality. Whereas various studies have quantified the soil microbial community’s key role in regulating plant community formation and dynamics, an insufficient number of studies have looked at phyllosphere microbial communities and the role they play in forest ecosystem dynamics. Some recent results suggest a very high complexity of phyllosphere microbial community dynamics, but the key determinants of the structure and variation of the leaf-habitat communities still need to be identified.

DSC_0019DSC_0042 Recent innovation in sequencing techniques has allowed the first complete, affordable and rapid microbial censuses. The aim of this project is to establish essential knowledge of the processes driving phyllosphere microbial community dynamics in the temperate forests of Quebec. This project has three objectives: (1) to identify macroscopic determinants of phyllosphere microbial community composition in natural temperate forests; (2) to determine microscale determinants of phyllosphere microbial dynamics of temperate trees; and (3) to test and observe the effects of urban stress on phyllosphere microbial community of urban trees in Montreal.


If you have a question or interest in our project feel free to contact me! isabelle.laforest.lapointe@gmail.com

Contribution to Science Presse – Blogue ta science

http://www.cef-cfr.ca/index.php?n=Membres.IsabelleLaforestLapointe

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