ArticlePlant physiology2023
Abscisic acid promotes auxin biosynthesis to inhibit primary root elongation in rice.
Article in Plant physiology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.
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33 citing papers in PubMed, 69 citations in OpenAlex.
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- Effect of Deep Placement Fertilization on Soybean (Plants (Basel, Switzerland) · 2026Article
- PtoHsfB1 regulates growth and salt response by affecting ABA biosynthesis inForestry research · 2026Article
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- Response of hidden architects to salt stress.Planta · 2025Review
- From Hormones to Harvests: A Pathway to Strengthening Plant Resilience for Achieving Sustainable Development Goals.Plants (Basel, Switzerland) · 2025Review
- A new phenotyping method for root growth studies in compacted soil validated by GWAS in barley.Plant methods · 2025Article
- The triggering mechanism for predominant hormonal signal production in fleshy fruit ripening.Molecular horticulture · 2025Review
- Crosstalk Between Ethylene and JA/ABA/Sugar Signalling in Plants Under Physiological and Stress Conditions.Molecular plant pathology · 2025Review
- Phosphatidic acid signaling in modulating plant reproduction and architecture.Plant communications · 2025Review
- Dressed Up to the Nines: The Interplay of Phytohormones Signaling and Redox Metabolism During Plant Response to Drought.Plants (Basel, Switzerland) · 2025Review
- Excessive accumulation of auxin inhibits protocorm development during germination of Paphiopedilum spicerianum.Plant cell reports · 2025Article
- Article
- ZmSPL12 Enhances Root Penetration and Elongation in Maize Under Compacted Soil Conditions by Responding to Ethylene Signaling.Plants (Basel, Switzerland) · 2024Article
- Transcriptomics integrated with targeted metabolomics reveals endogenous hormone changes in tuberous root expansion of Pueraria.BMC genomics · 2024Article
- Decoding the Impact of a Bacterial Strain ofMicroorganisms · 2024Article
- Spatial transcriptome analysis reveals de novo regeneration of poplar roots.Horticulture research · 2024Article
Corrections and comments
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Authors and funding
7 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Soil compaction is a global problem causing inadequate rooting and poor yield in crops. Accumulating evidence indicates that phytohormones coordinately regulate root growth via regulating specific growth processes in distinct tissues. However, how abscisic acid (ABA) signaling translates into auxin production to control root growth during adaptation to different soil environments is still unclear. In this study, we report that ABA has biphasic effects on primary root growth in rice (Oryza sativa) through an auxin biosynthesis-mediated process, causing suppression of root elongation and promotion of root swelling in response to soil compaction. We found that ABA treatment induced the expression of auxin biosynthesis genes and auxin accumulation in roots. Conversely, blocking auxin biosynthesis reduced ABA sensitivity in roots, showing longer and thinner primary roots with larger root meristem size and smaller root diameter. Further investigation revealed that the transcription factor basic region and leucine zipper 46 (OsbZIP46), involved in ABA signaling, can directly bind to the YUCCA8/rice ethylene-insensitive 7 (OsYUC8/REIN7) promoter to activate its expression, and genetic analysis revealed that OsYUC8/REIN7 is located downstream of OsbZIP46. Moreover, roots of mutants defective in ABA or auxin biosynthesis displayed the enhanced ability to penetrate compacted soil. Thus, our results disclose the mechanism in which ABA employs auxin as a downstream signal to modify root elongation and radial expansion, resulting in short and swollen roots impaired in their ability to penetrate compacted soil. These findings provide avenues for breeders to select crops resilient to soil compaction.
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