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Innate Immunity of Phlomis purpurea against Phytophthora cinnamomi: A Transcriptomic Analysis

A. Baldé,M. Pais,A. Cravador

Published 2021 in Journal of Agricultural Science and Technology

ABSTRACT

: Phlomis purpurea L. grows spontaneously in dry and stony habitats from the south of Iberian Peninsula and in cork oak ( Quercus suber L.) and holm oak ( Q. ilex ssp. rotundifolia , Lam.) plantations infested with Phytophthora cinnamomi (Rands). The aim of this study is to understand the genetic basis of P. purpurea innate immunity to this pathogen. The transcriptome analysis of P. purpurea upon challenging with P. cinnamomi revealed a set of up-regulated genes, related to signaling, transcription factors and response to stress. Transcripts involved in the synthesis of a number of proteins, namely: ANKYRIN , AP2 , AQUAPORIN , ARMADILLO , At1G69870-LIKE , BHLH, BON1 , CALMODULIN , CALNEXIN , CALRETICULINE , CC-NBS-LRR , CHAPERONE , CYTOCHROME , DUF , GH3 , GMP , G-TYPE , LIPOXYGENASE , MLO-LIKE , MYB , NAC , NBS-LRR , PENTATRICOPEPTIDE , SUBTILISIN , WAK , bZIP and hormones such as BRASSINOSTEROID , JASMONATE , SALICYLATE , ETHYLENE-RESPONSIVE were identified. P. purpurea ability to cope with P. cinnamomi attack is based on the expression of a set of transcription factors and signaling molecules targeted by the pathogen. The information gathered contributes to the elucidation of the overall response of P. purpurea to P. cinnamomi attempted infection which can be helpful for improving woody species resistance to pathogenic oomycetes.

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