ArticleScientific reports2021
ATHB2 is a negative regulator of germination in Arabidopsis thaliana seeds.
Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 15 citations in OpenAlex.
- Article
- Tobacco rattle virus infection alters Arabidopsis gene expression via virus-derived SiRNAs and host MiRNA network disruption.BMC genomics · 2025Article
- Genome-wide identification and transcription profiling of safflower (Carthamus tinctorius L.) HD-ZIP gene family under water deficit.BMC genomics · 2025Article
- The Ins and Outs of Homeodomain-Leucine Zipper/Hormone Networks in the Regulation of Plant Development.International journal of molecular sciences · 2024Review
- Genome-wide characterization and expression analysis of the HD-Zip II gene family in response to drought and GAMolecular biology reports · 2024Article
- Comprehensive bioinformation analysis of homeodomain-leucine zipper gene family and expression pattern of HD-Zip I under abiotic stress in Salix suchowensis.BMC genomics · 2024Article
- The roles of HD-ZIP proteins in plant abiotic stress tolerance.Frontiers in plant science · 2022Review
Corrections and comments
- Erratum issued
Authors and funding
5 authors at 5 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The germination timing of seeds is of the utmost adaptive importance for plant populations. Light is one of the best characterized factors promoting seed germination in several species. The germination is also finely regulated by changes in hormones levels, mainly those of gibberellin (GA) and abscisic acid (ABA). Here, we performed physiological, pharmacological, and molecular analyses to uncover the role of ATHB2, an HD-ZIP II transcription factor, in germination of Arabidopsis seeds. Our study demonstrated that ATHB2 is a negative regulator and sustains the expression of transcription factors to block germination promoted by light. Besides, we found that ATHB2 increases ABA sensitivity. Moreover, ABA and auxin content in athb2-2 mutant is higher than wild-type in dry seeds, but the differences disappeared during the imbibition in darkness and the first hours of exposition to light, respectively. Some ABA and light transcription factors are up-regulated by ATHB2, such as ABI5, ABI3, XERICO, SOMNUS and PIL5/PIF1. In opposition, PIN7, an auxin transport, is down-regulated. The role of ATHB2 as a repressor of germination induced by light affecting the gemination timing, could have differential effects on the establishment of seedlings altering the competitiveness between crops and weeds in the field.
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