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Responses to Heat and Cold Stress02:45

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TaMPK3 mediates synergistic damage from Fusarium crown rot and drought in wheat.

Nature communications·2026
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Tandemly duplicated TaERF109 genes confer drought tolerance and post-drought recovery in wheat.

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Emerging Mechanisms of Plant Responses to Abiotic Stress.

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TaCML49-B, a Calmodulin-like Protein, Interacts with TaIQD23 to Positively Regulate Salt Tolerance in Wheat.

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An ABF5b-HsfA2h/HsfC2a-NCED2b/POD4/HSP26 module integrates multiple signaling pathway to modulate heat stress tolerance in wheat.

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TaPPR13, a Pentatricopeptide Repeat Protein Gene Activated by TaBZR2, Confers Drought Stress Tolerance by Enhancing the Antioxidant Defense System and Promoting Retrograde Signaling in Wheat (Triticum aestivum).

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Functional Identification Reveals That TaTGA16-2D Promotes Drought and Heat Tolerance.

Jingna Ru1, Jiamin Hao2, Xiaoqian Ji2

  • 1The Industrial Crop Institute, Key Laboratory of Sustainable Dryland Agriculture of Shanxi Province, Taiyuan 030031, China.

Plants (Basel, Switzerland)
|July 30, 2025
PubMed
Summary

Wheat TGA transcription factors (TFs) are vital for plant development and stress response. This study identified 48 wheat TGAs, revealing TaTGA16-2D enhances tolerance to drought and heat, offering potential for crop improvement.

Keywords:
TGA transcription factorTaTGA16-2Dabiotic stress responseexpression profilewheat

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Area of Science:

  • Plant molecular biology
  • Genomics
  • Crop science

Background:

  • The TGACG motif-binding factor (TGA) family, a group of basic region/leucine zipper (bZIP) transcription factors, plays critical roles in plant development and stress responses.
  • Understanding the TGA family in crops like wheat (Triticum aestivum L.) is essential for improving agricultural resilience.

Purpose of the Study:

  • To conduct a comprehensive genome-wide analysis of the TGA transcription factor (TF) family in common wheat.
  • To investigate the evolutionary history and functional roles of wheat TGA genes, particularly in response to abiotic stresses.
  • To identify candidate genes for enhancing abiotic stress tolerance in wheat.

Main Methods:

  • Genome-wide identification and classification of TGA TFs in wheat.
  • Collinearity analysis to study gene duplication and conservation across species.
  • Expression pattern analysis under various abiotic stress conditions (drought, heat, cold).
  • Subcellular localization and functional validation of candidate genes in Arabidopsis.

Main Results:

  • Identified 48 wheat TGA genes, classified into four subgroups, with whole-genome and segmental duplications driving expansion.
  • Expression analysis revealed TaTGAs are involved in development and abiotic stress responses.
  • TaTGA16-2D showed significant upregulation under drought and heat stress and localized to the nucleus.
  • Overexpression of TaTGA16-2D in Arabidopsis enhanced tolerance to heat stress, with survival rates exceeding 34%.

Conclusions:

  • The study provides insights into the evolution and function of wheat TGA genes.
  • TaTGA16-2D is a promising candidate gene for enhancing abiotic stress tolerance in wheat through molecular breeding.