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Title: Understanding the Role of PIN Auxin Carrier Genes under Biotic and Abiotic Stresses in Olea europaea L.
Authors: Cardoso, Hélia
Campos, Catarina
Grzebelus, Dariusz
Egas, Conceição
Peixe, Augusto
Editors: Wang, Lei
Tanveer, Mohsin
Keywords: auxin
PIN transporter
stress response
expression patterns
Issue Date: Jul-2022
Publisher: MDPI
Citation: Cardoso H, Campos C, Grzebelus D, Egas C, Peixe A. Understanding the Role of PIN Auxin Carrier Genes under Biotic and Abiotic Stresses in Olea europaea L. Biology (Basel). 2022;11(7):1040. Published 2022 Jul 11. doi:10.3390/biology11071040
Abstract: The PIN-FORMED (PIN) proteins represent the most important polar auxin transporters in plants. Here, we characterized the PIN gene family in two olive genotypes, the Olea europaea subsp. europaea var. sylvestris and the var. europaea (cv. ‘Farga’). Twelve and 17 PIN genes were identified for vars. sylvestris and europaea, respectively, being distributed across 6 subfamilies. Genes encoding canonical OePINs consist of six exons, while genes encoding non-canonical OePINs are composed of five exons, with implications at protein specificities and functionality. A copia-LTR retrotransposon located in intron 4 of OePIN2b of var. europaea and the exaptation of partial sequences of that element as exons of the OePIN2b of var. sylvestris reveals such kind of event as a driving force in the olive PIN evolution. RNA-seq data showed that members from the subfamilies 1, 2, and 3 responded to abiotic and biotic stress factors. Co-expression of OePINs with genes involved in stress signaling and oxidative stress homeostasis were identified. This study highlights the importance of PIN genes on stress responses, contributing for a holistic understanding of the role of auxins in plants.
Type: article
Appears in Collections:MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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