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Volume 6
Journal of Plant Biochemistry & Physiology
ISSN: 2329-9029
Plant Science 2018
October 29-30, 2018
October 29-30, 2018 | Valencia, Spain
6
th
Global Summit on Plant Science
Role of epigenetics in tree phenotypic plasticity
S Maury, M D Sow, AL Le Gac, C Lafon Placette, D Conde, A Delaunay, R Fichot, F Brignolas, I Le Jan, J Tost, M Mirouze, V Segura, I Allona
and
S Strauss
LBLGC, France
G
lobal climate changes in progress will impact forest productivity notably through reduced water availability and heat
periods. One possibility to adapt is phenotypic plasticity for which epigenetic mechanisms are proposed to be a main source
of flexibility. Our objective is to evaluate the potential of DNA methylation to significantly participate to phenotypic plasticity in
trees, fixed and perennial organisms with major ecological roles. Over the 10 last years, using an integrative approach with eco
physiological, biochemical, transcriptomics, epigenomics (MeDIP, WGBS, Mobilome) and reverse genetics (RNAi lines) tools,
we were able to dissect the shoot apical meristem (center of the shoot morphogenesis) the response of trees to environmental
variations. This work was assessed in distinct experimental set-ups from greenhouse to field plantations as well as during the
stress or months post-stress. Our data (recently published and unpublished) showed that Differentially Methylated Regions
(DMRs) are associated to active TE and differentially expressed genes with biological functions related to stress response and
phyto hormone signaling. Altogether, our data proposed that DNAmethylation is a source of flexibility associated to phenotypic
plasticity in trees opening perspectives for tree breeding.
stephane.maury@univ-orleans.frJ Plant Biochem Physiol 2018, Volume 6
DOI: 10.4172/2329-9029-C1-003