ArticleJournal of experimental botany2015
Expression of Brassica napus TTG2, a regulator of trichome development, increases plant sensitivity to salt stress by suppressing the expression of auxin biosynthesis genes.
Article in Journal of experimental botany, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.
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27 citing papers in PubMed, 50 citations in OpenAlex.
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- Plant Signaling Hormones and Transcription Factors: Key Regulators of Plant Responses to Growth, Development, and Stress.Plants (Basel, Switzerland) · 2025Review
- Progress on Salt Tolerance inPlants (Basel, Switzerland) · 2024Review
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- Multifaceted roles of LhWRKY44 in promoting anthocyanin accumulation in Asiatic hybrid lilies (Horticulture research · 2023Article
- Genome-Wide Identification and Analysis of theGenes · 2023Article
- Precise Regulation of the TAA1/TAR-YUCCA Auxin Biosynthesis Pathway in Plants.International journal of molecular sciences · 2023Review
- Auxin Biosynthesis Genes in Allotetraploid Oilseed Rape Are Essential for Plant Development and Response to Drought Stress.International journal of molecular sciences · 2022Article
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- Heat Stress Resistance Mechanisms of Two Cucumber Varieties from Different Regions.International journal of molecular sciences · 2022Article
- Transcriptome profiling reveals key genes in regulation of the tepal trichome development in Lilium pumilum D.C.Plant cell reports · 2021Article
- Review
- Phytohormone-Based Regulation of Trichome Development.Frontiers in plant science · 2021Review
- Engineering Multiple Abiotic Stress Tolerance in Canola,Frontiers in plant science · 2020Review
- A tetraspanin gene regulating auxin response and affecting orchid perianth size and various plant developmental processes.Plant direct · 2019Article
- The Dynamic Genetic-Hormonal Regulatory Network Controlling the Trichome Development in Leaves.Plants (Basel, Switzerland) · 2019Review
- Comparative transcriptomic analysis of high- and low-oil3 Biotech · 2019Article
- Article
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Authors and funding
9 authors at 2 institutions in 2 countries.
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No grant is acknowledged in the PubMed record.
Abstract
WRKY transcription factors (TFs) are plant specific and play important roles in regulating diverse biological processes. To identify TFs with broad-spectrum effects on various stress responses in Brassica napus, an important oil crop grown across diverse ecological regions worldwide, we functionally characterized Bna.TTG2 genes, which are homologous to the Arabidopsis AtTTG2 (WRKY44) gene. Four Bna.TTG2 genes were capable of rescuing the trichome phenotypes of Arabidopsis ttg2 mutants. Overexpressing one Bna.TTG2 family member, BnaA.TTG2.a.1, remarkably increased trichome numbers in Arabidopsis and B. napus plants. Interestingly, the BnaA.TTG2.a.1-overexpressing plants of both species exhibited increased sensitivity to salt stress. In BnaA.TTG2.a.1-overexpressing Arabidopsis under salt stress, the endogenous indole-3-acetic acid (IAA) content was reduced, and the expression of two auxin biosynthesis genes, TRYPTOPHAN BIOSYNTHESIS 5 (TRP5) and YUCCA2 (YUC2), was downregulated. The results from yeast one-hybrid, electrophoretic mobility shift, and dual-luciferase reporter assays revealed that BnaA.TTG2.a.1 is able to bind to the promoters of TRP5 and YUC2. These data indicated that BnaA.TTG2.a.1 confers salt sensitivity to overexpressing plants by suppressing the expression of IAA synthesis genes and thus lowering IAA levels. Transgenic Arabidopsis plants with an N-terminus-deleted BnaA.TTG2.a.1 no longer showed hypersensitivity to salt stress, suggesting that the N terminus of BnaA.TTG2.a.1 plays a critical role in salt stress responses. Therefore, in addition to its classical function in trichome development, our study reveals a novel role for Bna.TTG2 genes in salt stress responses.
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