ArticlePlant physiology2022
The HD-Zip transcription factor SlHB15A regulates abscission by modulating jasmonoyl-isoleucine biosynthesis.
Article in Plant physiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.
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Who cites it
26 citing papers in PubMed, 51 citations in OpenAlex.
- A multi-perspective analysis of the regulatory mechanisms governing pedicel abscission in tomato.Plant cell reports · 2026Review
- FveDAD2 negatively regulates branch crowns by affecting abscisic acid metabolism through FveHB7 in woodland strawberry.Horticulture research · 2026Article
- Transcriptomic analysis reveals key genes and pathways involved in fruit abscission of Epimedium pubescens.BMC plant biology · 2025Article
- Elucidating the Molecular Mechanisms of Physiological Fruit Abscission inPlants (Basel, Switzerland) · 2025Article
- Genome-Wide Identification of theGenes · 2025Article
- A KNOTTED1-LIKE HOMEOBOX PROTEIN1-interacting transcription factor SlGATA6 maintains the auxin-response gradient to inhibit abscission.Science advances · 2025Article
- Harnessing Jasmonate Pathways: PgJAR1's Impact on Ginsenoside Accumulation in Ginseng.Plants (Basel, Switzerland) · 2025Article
- Molecular breeding of tomato: Advances and challenges.Journal of integrative plant biology · 2025Review
- Unraveling the mechanisms of fruit abscission inFrontiers in plant science · 2025Article
- The Quantification of Jasmonates in Lipid-Rich Tissues by UHPLC-ESI-QQQ-MS/MS in Multiple Reaction Monitoring (MRM).Methods in molecular biology (Clifton, N.J.) · 2025Article
- Genome-wide identification and characterization of Ethylene-Insensitive 3 (EIN3/EIL) gene family in Camellia oleifera.PloS one · 2025Article
- Genome-wide analysis of HD-Zip genes in Sophora alopecuroides and their role in salt stress response.The plant genome · 2024Article
- Transcription Factor VlbZIP14 Inhibits Postharvest Grape Berry Abscission by Directly ActivatingInternational journal of molecular sciences · 2024Article
- Abscission in plants: from mechanism to applications.Advanced biotechnology · 2024Review
- Genome-wide characterisation of HD-Zip transcription factors and functional analysis of PbHB24 during stone cell formation in Chinese white pear (Pyrus bretschneideri).BMC plant biology · 2024Article
- Identification ofPhysiology and molecular biology of plants : an international journal of functional plant biology · 2024Article
- New Advances in the Study of Regulation of Tomato Flowering-Related Genes Using Biotechnological Approaches.Plants (Basel, Switzerland) · 2024Review
- Accumulation of coumaric acid is a key factor in tobacco continuous cropping obstacles.Frontiers in plant science · 2024Article
- Abscission zone metabolism impacts pre- and post-harvest fruit quality: a very attaching story.Frontiers in plant science · 2024Review
- Thidiazuron combined with cyclanilide modulates hormone pathways and ROS systems in cotton, increasing defoliation at low temperatures.Frontiers in plant science · 2024Article
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Authors and funding
11 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Plant organ abscission, a process that is important for development and reproductive success, is inhibited by the phytohormone auxin and promoted by another phytohormone, jasmonic acid (JA). However, the molecular mechanisms underlying the antagonistic effects of auxin and JA in organ abscission are unknown. We identified a tomato (Solanum lycopersicum) class III homeodomain-leucine zipper transcription factor, HOMEOBOX15A (SlHB15A), which was highly expressed in the flower pedicel abscission zone and induced by auxin. Knocking out SlHB15A using clustered regularly interspaced short palindromic repeats-associated protein 9 technology significantly accelerated abscission. In contrast, overexpression of microRNA166-resistant SlHB15A (mSlHB15A) delayed abscission. RNA sequencing and reverse transcription-quantitative PCR analyses showed that knocking out SlHB15A altered the expression of genes related to JA biosynthesis and signaling. Furthermore, functional analysis indicated that SlHB15A regulates abscission by depressing JA-isoleucine (JA-Ile) levels through inhabiting the expression of JASMONATE-RESISTANT1 (SlJAR1), a gene involved in JA-Ile biosynthesis, which could induce abscission-dependent and abscission-independent ethylene signaling. SlHB15A bound directly to the SlJAR1 promoter to silence SlJAR1, thus delaying abscission. We also found that flower removal enhanced JA-Ile content and that application of JA-Ile severely impaired the inhibitory effects of auxin on abscission. These results indicated that SlHB15A mediates the antagonistic effect of auxin and JA-Ile during tomato pedicel abscission, while auxin inhibits abscission through the SlHB15A-SlJAR1 module.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.