ArticlePlant physiology2013
The manipulation of auxin in the abscission zone cells of Arabidopsis flowers reveals that indoleacetic acid signaling is a prerequisite for organ shedding.
Article in Plant physiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 59 papers.
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Who cites it
59 citing papers in PubMed.
- Seed shattering habit in millets and the secrets of the abscission layer - a comprehensive review.Protoplasma · 2026Review
- Calcium Reduces Fruit Abscission inPlants (Basel, Switzerland) · 2025Article
- miRNA-targeted auxin nuclear signalling elements orchestrate flower fate and drought response in yellow lupine.Scientific reports · 2025Article
- Abscission zones: cellular interfaces for the programmed separation of organs.Annals of botany · 2025Review
- Harnessing the MYB51/SWEET20 module to increase soybean yield by facilitating sugar supply to sink organs.Plant cell reports · 2025Article
- Article
- A KNOTTED1-LIKE HOMEOBOX PROTEIN1-interacting transcription factor SlGATA6 maintains the auxin-response gradient to inhibit abscission.Science advances · 2025Article
- Transcriptome analyses for revealing leaf abscission of Cyclocarya paliurus stem segments in vitro.BMC genomics · 2025Article
- Article
- Dissection of the IDA promoter identifies WRKY transcription factors as abscission regulators in Arabidopsis.Journal of experimental botany · 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
- Auxin as an architect of the pectin matrix.Journal of experimental botany · 2023Review
- Phytohormones and candidate genes synergistically regulate fruitlet abscission in Areca catechu L.BMC plant biology · 2023Article
- Comparative Physiological and Transcriptomic Mechanisms of Defoliation in Cotton in Response to Thidiazuron versus Ethephon.International journal of molecular sciences · 2023Article
- Understanding and overcoming hybrid lethality in seed and seedling stages as barriers to hybridization and gene flow.Frontiers in plant science · 2023Review
- Low Temperature Inhibits the Defoliation Efficiency of Thidiazuron in Cotton by Regulating Plant Hormone Synthesis and the Signaling Pathway.International journal of molecular sciences · 2022Article
- Overexpression of TaLAX3-1B alters the stomatal aperture and improves the salt stress resistance of tobacco.Molecular biology reports · 2022Article
- Potential Carbohydrate Regulation Mechanism Underlying Starvation-Induced Abscission of Tomato Flower.International journal of molecular sciences · 2022Article
- A Possible Mode of Action of Methyl Jasmonate to Induce the Secondary Abscission Zone in Stems ofPlants (Basel, Switzerland) · 2022Article
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6 authors.
Funding
Abstract
A number of novel strategies were employed to examine the role of indoleacetic acid (IAA) in regulating floral organ abscission in Arabidopsis (Arabidopsis thaliana). Analysis of auxin influx facilitator expression in β-glucuronidase reporter plants revealed that AUXIN RESISTANT1, LIKE AUX1, and LAX3 were specifically up-regulated at the site of floral organ shedding. Flowers from mutants where individual family members were down-regulated exhibited a reduction in the force necessary to bring about petal separation; however, the effect was not additive in double or quadruple mutants. Using the promoter of a polygalacturonase (At2g41850), active primarily in cells undergoing separation, to drive expression of the bacterial genes iaaL and iaaM, we have shown that it is possible to manipulate auxin activity specifically within the floral organ abscission zone (AZ). Analysis of petal breakstrength reveals that if IAA AZ levels are reduced, shedding takes place prematurely, while if they are enhanced, organ loss is delayed. The At2g41850 promoter was also used to transactivate the gain-of-function AXR3-1 gene in order to disrupt auxin signaling specifically within the floral organ AZ cells. Flowers from transactivated lines failed to shed their sepals, petals, and anthers during pod expansion and maturity, and these organs frequently remained attached to the plant even after silique desiccation and dehiscence had taken place. These observations support a key role for IAA in the regulation of abscission in planta and reveal, to our knowledge for the first time, a requirement for a functional IAA signaling pathway in AZ cells for organ shedding to take place.
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