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Related Concept Videos

Responses to Salt Stress02:02

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Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
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Related Experiment Video

Updated: Mar 7, 2026

Analysis of Effect of Compound Salt Stress on Seed Germination and Salt Tolerance Analysis of Pepper Capsicum annuum L.
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TaHsfA2-11-TaZAT8 module negatively regulates salt tolerance in wheat.

Runsi Qi1, Xiangzhao Meng2, Huaning Zhang2

  • 1Institute of Biotechnology and Food Science, Hebei Academy of Agriculture and Forestry Sciences/Hebei Key Laboratory of Plant Genetic Engineering, Shijiazhuang, 050051, China; College of Life Sciences, Hebei Normal University, Shijiazhuang, 050024, China.

Plant Physiology and Biochemistry : PPB
|March 5, 2026
PubMed
Summary

Wheat heat shock transcription factor TaHsfA2-11 enhances salt sensitivity by upregulating the negative regulator TaZAT8. This study reveals a new mechanism for plant salt tolerance regulation and identifies a target for improving wheat salt resistance.

Keywords:
Genetic transformationHeat shock transcription factor TaHsfA2-11Salt stressTaZAT8Wheat

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Area of Science:

  • Plant Molecular Biology
  • Abiotic Stress Physiology
  • Crop Breeding

Background:

  • Plant heat shock transcription factors (Hsfs) are crucial for abiotic stress responses and molecular breeding.
  • The wheat Hsf family has complex functions, with individual genes often involved in multiple stress responses.
  • TaHsfA2-11, a wheat HsfA2 subfamily member, was previously shown to improve thermotolerance and be upregulated by NaCl.

Purpose of the Study:

  • To investigate the function of TaHsfA2-11 in plant salt resistance.
  • To elucidate the molecular mechanism by which TaHsfA2-11 regulates salt tolerance.
  • To identify potential target genes for enhancing wheat salt tolerance through breeding.

Main Methods:

  • Generation of transgenic Arabidopsis thaliana and wheat overexpressing TaHsfA2-11.
  • Phenotypic analysis of salt stress tolerance in transgenic and wild-type plants.
  • RNA-sequencing (RNA-seq) to identify differentially expressed genes (DEGs) in response to TaHsfA2-11 overexpression.
  • Electrophoretic mobility shift assay (EMSA) and dual luciferase reporter assay (DLR) to confirm gene regulation.
  • Overexpression of TaZAT8 in Arabidopsis to assess its role in salt tolerance.

Main Results:

  • TaHsfA2-11 overexpression in Arabidopsis and wheat led to increased salt sensitivity, with reduced germination and growth.
  • RNA-seq revealed DEGs enriched in stress response, ROS, protein folding, and metabolic pathways.
  • TaHsfA2-11 directly binds to the promoter of Zinc finger protein 8 (TaZAT8) and activates its transcription.
  • Overexpression of TaZAT8 also enhanced salt sensitivity in Arabidopsis, mirroring TaHsfA2-11 phenotypes.

Conclusions:

  • TaHsfA2-11 negatively regulates plant salt tolerance, likely by upregulating TaZAT8.
  • This regulation involves pathways related to photosynthesis, ROS accumulation, and flavonoid synthesis.
  • TaHsfA2-11 and TaZAT8 represent novel targets for genetic engineering to improve wheat salt tolerance.