ArticlePlant cell reports2021
MdBZR1 regulates ABA response by modulating the expression of MdABI5 in apple.
Article in Plant cell reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 15 citations in OpenAlex.
- Exogenous Hormones Affect the Corm Expansion ofPlants (Basel, Switzerland) · 2026Article
- Manipulating brassinosteroid signaling pathway to genetically improve horticultural plants.aBIOTECH · 2025Review
- The Characterization of Columnar Apple GeneInternational journal of molecular sciences · 2022Article
- The MdABI5 transcription factor interacts with the MdNRT1.5/MdNPF7.3 promoter to fine-tune nitrate transport from roots to shoots in apple.Horticulture research · 2021Article
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Authors and funding
9 authors at 1 institution in 1 country.
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Abstract
key messageMdBZR1 directly binds to the promoter of MdABI5 and suppresses its expression to mediate ABA response. The plant hormones brassinosteroids (BRs) and abscisic acid (ABA) antagonistically regulate various aspects of plant growth and development. However, the association between BR and ABA signaling is less clear. Here, we identified MdBZR1 in apple (Malus domestica) and demonstrated that it was activated by BRs and could respond to ABA treatment. Overexpression of MdBZR1 in apple calli and Arabidopsis reduced ABA-hypersensitive phenotypes, suggesting that MdBZR1 negatively regulates ABA signaling. Subsequently, we found that MdBZR1 directly bound to the promoter region of MdABI5 and suppressed its expression. MdABI5 was significantly induced by ABA treatment. And overexpression of MdABI5 in apple calli increased sensitivity to ABA. Ectopic expression of MdABI5 in Arabidopsis inhibited seed germination and seedling growth. In addition, overexpression of MdBZR1 partially attenuated MdABI5-mediated ABA sensitivity. Taken together, our data indicate that MdBZR1 directly binds to the promoter of MdABI5 and suppresses its expression to antagonistically mediate ABA response. Our work contributes to the functional studies of BZR1 and further broadens the insight into the between BR and ABA signaling.
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