ArticlePlant physiology2021
Phloem unloading via the apoplastic pathway is essential for shoot distribution of root-synthesized cytokinins.
Article in Plant physiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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Who cites it
20 citing papers in PubMed.
- Towards an integrated molecular understanding of plant hormones.Journal of integrative plant biology · 2026Review
- Cytokinin receptor AHK3 influences leaf size by modulating trans-zeatin-type cytokinin levels in xylem.Plant & cell physiology · 2026Article
- Cytokinin availability and chloroplast functional lifetime in senescing leaves.Frontiers in plant science · 2026Review
- Molecular Mechanisms of the Phytohormone-Heat Shock Protein Pathway in Regulating Plant Thermotolerance.Plants (Basel, Switzerland) · 2025Review
- RsRCO and RsLMI1 co-regulate the formation of lobed leaf in radish (Raphanus sativus L.).TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2025Article
- Humic field biostimulation as a sustainable agricultural practice to increase yield of main grains: evidence from on-farm trials.Frontiers in plant science · 2025Article
- Laser dissection-assisted phloem transcriptomics highlights the metabolic and physiological changes accompanying clubroot disease progression in oilseed rape.The Plant journal : for cell and molecular biology · 2025Article
- The cytokinin efflux transporter ABCC4 participates in Arabidopsis root system development.Plant physiology · 2024Article
- Overexpression of MtIPT gene enhanced drought tolerance and delayed leaf senescence of creeping bentgrass (Agrostis stolonifera L.).BMC plant biology · 2024Article
- Spatially distributed cytokinins: Metabolism, signaling, and transport.Plant communications · 2024Review
- Cytokinin: From autoclaved DNA to two-component signaling.The Plant cell · 2024Review
- Review
- Sucrose synthase gene family in common bean during pod filling subjected to moisture restriction.Frontiers in plant science · 2024Article
- Spatial transcriptomics reveals light-induced chlorenchyma cells involved in promoting shoot regeneration in tomato callus.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Phytohormone Crosstalk of Cytokinin Biosynthesis and Signaling Family Genes in Moso Bamboo (International journal of molecular sciences · 2023Article
- Arabidopsis ABCG14 forms a homodimeric transporter for multiple cytokinins and mediates long-distance transport of isopentenyladenine-type cytokinins.Plant communications · 2023Article
- ABCG11 modulates cytokinin responses inFrontiers in plant science · 2022Article
- Grafting: a potential method to reveal the differential accumulation mechanism of secondary metabolites.Horticulture research · 2022Article
- Genotype-Dependent Effect of Silencing ofInternational journal of molecular sciences · 2021Article
- Review
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Authors and funding
12 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Root-synthesized cytokinins are transported to the shoot and regulate the growth, development, and stress responses of aerial tissues. Previous studies have demonstrated that Arabidopsis (Arabidopsis thaliana) ATP binding cassette (ABC) transporter G family member 14 (AtABCG14) participates in xylem loading of root-synthesized cytokinins. However, the mechanism by which these root-derived cytokinins are distributed in the shoot remains unclear. Here, we revealed that AtABCG14-mediated phloem unloading through the apoplastic pathway is required for the appropriate shoot distribution of root-synthesized cytokinins in Arabidopsis. Wild-type rootstocks grafted to atabcg14 scions successfully restored trans-zeatin xylem loading. However, only low levels of root-synthesized cytokinins and induced shoot signaling were rescued. Reciprocal grafting and tissue-specific genetic complementation demonstrated that AtABCG14 disruption in the shoot considerably increased the retention of root-synthesized cytokinins in the phloem and substantially impaired their distribution in the leaf apoplast. The translocation of root-synthesized cytokinins from the xylem to the phloem and the subsequent unloading from the phloem is required for the shoot distribution and long-distance shootward transport of root-synthesized cytokinins. This study revealed a mechanism by which the phloem regulates systemic signaling of xylem-mediated transport of root-synthesized cytokinins from the root to the shoot.
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