Identification of Genes Differentially Expressed in Response to Cold in Pisum sativum Using RNA Sequencing Analyses

Nasser Bahrman , Émilie Hascoët , Odile Jaminon , Frédéric Dépta , Jean-François Hû , Olivier Bouchez , Isabelle Lejeune-Henaut (1, 2, 3) , Bruno Delbreil , Sylvain Legrand (4, 5)

1 AgroImpact - Agroressources et Impacts environnementaux
2 BioEcoAgro - UMR transfrontalière INRAE 1158
3 BioEcoAgro - Equipe 1 - Functioning and adaptation of the plant in interaction with its environment
4 Evo-Eco-Paléo (EEP) - Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198
5 Université de Lille

Low temperature stress affects growth and development in pea (Pisum sativum L.) and decreases yield. In this study, RNA sequencing time series analyses performed on lines, Champagne frost-tolerant and Térèse frost-sensitive, during a low temperature treatment versus a control condition, led us to identify 4981 differentially expressed genes. Thanks to our experimental design and statistical analyses, we were able to classify these genes into three sets. The first one was composed of 2487 genes that could be related to the constitutive differences between the two lines and were not regulated during cold treatment. The second gathered 1403 genes that could be related to the chilling response. The third set contained 1091 genes, including genes that could be related to freezing tolerance. The identification of differentially expressed genes related to cold, oxidative stress, and dehydration responses, including some transcription factors and kinases, confirmed the soundness of our analyses. In addition, we identified about one hundred genes, whose expression has not yet been linked to cold stress. Overall, our findings showed that both lines have different characteristics for their cold response (chilling response and/or freezing tolerance), as more than 90% of differentially expressed genes were specific to each of them.

Mots clés: pea; chilling; acclimation; freezing tolerance; transcriptome; RNA-seq; cold stress

Domaines: Génétique des plantes; Génomique, Transcriptomique et Protéomique [q-bio.GN]

Nasser Bahrman, Émilie Hascoët, Odile Jaminon, Frédéric Dépta, Jean-François Hû, et al.. Identification of Genes Differentially Expressed in Response to Cold in Pisum sativum Using RNA Sequencing Analyses. Plants, 2019, 8 (8), pp.288. ⟨10.3390/plants8080288⟩. ⟨hal-02458796⟩