Badawi, Mohamed A.; Agharbaoui, Zahra; Zayed, Muhammad; Li, Qiang; Byrns, Brook; Zou, Jitao; Fowler, D. Brian; Danyluk, Jean et Sarhan, Fathey
(2019).
« Genome-Wide Identification and Characterization of the Wheat Remorin ( REM) Family during Cold Acclimation ».
The Plant Genome, 12(2), pp. 1-22.
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Résumé
Remorins (REMs) are plant-specific proteins that
play an essential role in plant–microbe interactions. However,
their roles in vernalization and abiotic stress responses remain
speculative. Most remorins have a variable proline-rich N-half and
a more conserved C-half that is predicted to form coils. A search
of the wheat (Triticum aestivum L.) database revealed the existence
of 20 different REM genes, which we classified into six groups
on the basis of whether they shared a common phylogenetic and
structural origin. Analysis of the physical genomic distributions
demonstrated that REM genes are dispersed in the wheat
genome and have one to seven introns. Promoter analysis of
TaREM genes revealed the presence of putative cis-elements
related to diverse functions like development, hormonal regulation,
and biotic and abiotic stress responsiveness. Expression levels
of TaREM genes were measured in plants grown under field
and controlled conditions and in response to hormone treatment.
Our analyses revealed that 12 members of the REM family are
regulated during cold acclimation in wheat in four different tissues
(roots, crowns, stems, and leaves), with the highest expression
in roots. Differential gene expression was found between wheat
cultivars with contrasting degrees of cold tolerance, suggesting
the implication of TaREM genes in cold response and tolerance.
Additionally, eight genes were induced in response to abscisic
acid and methyl jasmonate treatment. This genome-wide analysis
of TaREM genes provides valuable resources for functional
analysis aimed at understanding their role in stress adaptation.
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