ArticleJournal of experimental botany2019
TIR1 auxin receptors are implicated in the differential response to 4-Cl-IAA and IAA in developing pea fruit.
Article in Journal of experimental botany, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 20 citations in OpenAlex.
- Development of the HTRF assay to evaluate the auxin-induced binding between TIR1 and IAA7.The New phytologist · 2026Article
- Auxin Biosynthesis, Transport, Signaling, and Its Roles in Plant Leaf Morphogenesis.Plants (Basel, Switzerland) · 2025Review
- Auxins in the right space and time regulate pea fruit development.Journal of experimental botany · 2022Article
- Review
- Auxin Metabolism in Plants.Cold Spring Harbor perspectives in biology · 2021Review
- Sedentary Plant-Parasitic Nematodes Alter Auxin Homeostasis via Multiple Strategies.Frontiers in plant science · 2021Review
- Chlorinated Auxins-How DoesInternational journal of molecular sciences · 2020Article
- Genome-wide identification of microRNAs involved in the regulation of fruit ripening and climacteric stages in melon (Horticulture research · 2020Article
- Auxin Gradients Determine Reproductive Development in Pea (Pisum sativum).Physiologia plantarumArticle
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Authors and funding
5 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
The auxins indole-3-acetic acid (IAA) and 4-chloroindole-3-acetic acid (4-Cl-IAA) occur naturally in pea (Pisum sativum); however, only 4-Cl-IAA mimics the presence of seeds in stimulating pericarp growth. To examine if this differential auxin effect is mediated through TIR1/AFB auxin receptors, pea TIR1 and AFB2 homologs were functionally characterized in Arabidopsis, and receptor expression, and auxin distribution and action were profiled in developing pea fruits. PsTIR1a, PsTIR1b, and PsAFB2 restored the auxin-sensitive root growth response to the mutant Arabidopsis seedlings Attir1-10 and/or Attir1-10 afb2-3. Expression of PsTIR1 or AtTIR1 in Attir1-10 afb2-3 mutants also restored the greater root inhibitory response of 4-Cl-IAA compared to that of IAA, implicating TIR1 receptors in this response. The ability of 4-Cl-IAA to stimulate a stronger DR5::GUS auxin response than IAA at the same concentration in pea pericarps was associated with its ability to enrich the auxin-receptor transcript pool with PsTIR1a and PsAFB2 by decreasing the transcript abundance of PsTIR1b (mimicking results in pericarps with developing seeds). Therefore, the markedly different effect of IAA and 4-Cl-IAA on pea fruit growth may at least partially involve TIR1/AFB receptors and the differential modulation of their population, resulting in specific Aux/IAA protein degradation that leads to an auxin-specific tissue response.
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