Dataset Information

The Role of Tomato WRKY Genes in Plant Responses to Combined Abiotic and Biotic Stresses.

ABSTRACT: In the field, plants constantly face a plethora of abiotic and biotic stresses that can impart detrimental effects on plants. In response to multiple stresses, plants can rapidly reprogram their transcriptome through a tightly regulated and highly dynamic regulatory network where WRKY transcription factors can act as activators or repressors. WRKY transcription factors have diverse biological functions in plants, but most notably are key players in plant responses to biotic and abiotic stresses. In tomato there are 83 WRKY genes identified. Here we review recent progress on functions of these tomato WRKY genes and their homologs in other plant species, such as Arabidopsis and rice, with a special focus on their involvement in responses to abiotic and biotic stresses. In particular, we highlight WRKY genes that play a role in plant responses to a combination of abiotic and biotic stresses.

SUBMITTER: Bai Y

PROVIDER: S-EPMC6008426 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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The Role of Tomato <i>WRKY</i> Genes in Plant Responses to Combined Abiotic and Biotic Stresses.

Bai Yuling Y Sunarti Sri S Kissoudis Christos C Visser Richard G F RGF van der Linden C G CG

Frontiers in plant science 20180613

In the field, plants constantly face a plethora of abiotic and biotic stresses that can impart detrimental effects on plants. In response to multiple stresses, plants can rapidly reprogram their transcriptome through a tightly regulated and highly dynamic regulatory network where WRKY transcription factors can act as activators or repressors. WRKY transcription factors have diverse biological functions in plants, but most notably are key players in plant responses to biotic and abiotic stresses. ...[more]

PMID: 29951078

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Project description:BACKGROUND:Sesame (Sesamum indicum L.) is one of the world's most important oil crops. However, it is susceptible to abiotic stresses in general, and to waterlogging and drought stresses in particular. The molecular mechanisms of abiotic stress tolerance in sesame have not yet been elucidated. The WRKY domain transcription factors play significant roles in plant growth, development, and responses to stresses. However, little is known about the number, location, structure, molecular phylogenetics, and expression of the WRKY genes in sesame. RESULTS:We performed a comprehensive study of the WRKY gene family in sesame and identified 71 SiWRKYs. In total, 65 of these genes were mapped to 15 linkage groups within the sesame genome. A phylogenetic analysis was performed using a related species (Arabidopsis thaliana) to investigate the evolution of the sesame WRKY genes. Tissue expression profiles of the WRKY genes demonstrated that six SiWRKY genes were highly expressed in all organs, suggesting that these genes may be important for plant growth and organ development in sesame. Analysis of the SiWRKY gene expression patterns revealed that 33 and 26 SiWRKYs respond strongly to waterlogging and drought stresses, respectively. Changes in the expression of 12 SiWRKY genes were observed at different times after the waterlogging and drought treatments had begun, demonstrating that sesame gene expression patterns vary in response to abiotic stresses. CONCLUSIONS:In this study, we analyzed the WRKY family of transcription factors encoded by the sesame genome. Insight was gained into the classification, evolution, and function of the SiWRKY genes, revealing their putative roles in a variety of tissues. Responses to abiotic stresses in different sesame cultivars were also investigated. The results of our study provide a better understanding of the structures and functions of sesame WRKY genes and suggest that manipulating these WRKYs could enhance resistance to waterlogging and drought.

Project description:Simple Summary The plant hormone auxin is involved in the majority of the processes related to plant development and growth and response to environmental constraints. The PIN proteins are a group of auxin transporters that are also involved in plant responses to stresses. This study describes the PIN gene family in the domesticated olive tree (Olea europaea subsp. europaea var. europaea) and its wild relative (O. europaea subsp. europaea var. sylvestris). Twelve and 17 PIN genes were identified for vars. sylvestris and europaea, respectively, being distributed across 6 subfamilies. Differences in the patterns of gene diversification and subfamilies expansion were observed across subfamilies. Genes encoding canonical OePIN proteins comprise six exons, while genes encoding non-canonical OePINs are composed of five exons, with implications for protein specificities and functionality. Expression analysis of OePINs from RNA-seq data showed that members from the subfamilies 1, 2, and 3 responded to abiotic and biotic stress factors. Our study shows the diversification of PINs in an important species such as the olive tree and highlights the importance of PIN genes on stress responses, contributing to a holistic understanding of the role of auxins in plants. 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.

Dataset Information

The Role of Tomato WRKY Genes in Plant Responses to Combined Abiotic and Biotic Stresses.

Publications

The Role of Tomato <i>WRKY</i> Genes in Plant Responses to Combined Abiotic and Biotic Stresses.

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