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Polyamine uptake transporter 2 is essential for systemic acquired resistance establishment in Arabidopsis
Flores-Hernández, Emmanuel Gonzalez, María Elisa Alvarado-Guitron, Paulina Jasso-Robles, Francisco I. Ovando-Vázquez, Cesaré Jiménez-Bremont, Juan Francisco Ćavar Zeljković, Sanja Ulbrichová, Markéta De Diego, Nuria Rodríguez-Kessler, Margarita
Flores-Hernández, Emmanuel
Gonzalez, María Elisa
Alvarado-Guitron, Paulina
Jasso-Robles, Francisco I.
Ovando-Vázquez, Cesaré
Jiménez-Bremont, Juan Francisco
Ćavar Zeljković, Sanja
Ulbrichová, Markéta
De Diego, Nuria
Rodríguez-Kessler, Margarita
Abstract
The study of polyamine transport in plants has become increasingly important due to the central role of these amines in regulating growth, development, adaptation, and stress responses. This research focused on the Arabidopsis thaliana Polyamine Uptake Transporters gene family under conditions of systemic acquired resistance. We evaluated all single mutants of this gene family and found that the put2-1 mutant abolished systemic acquired resistance while enhancing basal resistance to Pseudomonas syringae pv. tomato DC3000. In contrast, the 35S::PUT2 overexpression lines showed improved resistance and reduced bacterial titers compared to wild-type plants. RNA-seq analysis revealed that the put2-1 mutant had deregulated expression of genes involved in the biosynthesis, signaling, and inactivation of salicylic acid and N-hydroxypipecolic acid. Most of these genes were transcriptionally upregulated by putrescine in wild-type plants, but not in the put2-1 mutant. Putrescine supplementation increased endogenous putrescine and salicylic acid levels in wild-type plants but not in put2-1, highlighting the essential role of this transporter in facilitating putrescine mobilization and regulating salicylic acid in distal tissues. We found that the defective systemic acquired resistance phenotype in the put2-1 mutant was linked to changes in the timing of polyamines, ROS, phenolic compound accumulation, and alterations in stomatal immunity. Our study emphasizes the key role of the Polyamine Uptake Transporter 2 (PUT2/LAT4) in establishing systemic acquired resistance in Arabidopsis, while also maintaining the plant’s intrinsic basal resistance mechanisms. These findings offer valuable insights into the complex mechanisms of plant resistance, positioning polyamine transport as a central hub in systemic responses.
Description
Keywords
Putrescine, Polyamine transport, Reactive oxygen species, Salicylic acid, Systemic acquired resistance
Funding
SECIHTI, MZE-RO0423, CZ.02.01.01/00/23_021/0008909
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Type
article
License
Attribution 4.0 International
Date
2025-09-23
Publisher
Elsevier B.V.
Book
Journal
Plant Stress
Plant Stress
Plant Stress
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item.page.volume.title
DOI
10.1016/j.stress.2025.101046
Citation
Flores-Hernández, E., Gonzalez, M. E., Alvarado-Guitron, P., Jasso-Robles, F. I., Ovando-Vázquez, C., Jiménez-Bremont, J. F., Ćavar Zeljković, S., Ulbrichová, M., De Diego, N., & Rodríguez-Kessler, M. (2025). Polyamine uptake transporter 2 is essential for systemic acquired resistance establishment in Arabidopsis. Plant Stress, 18, 101046. https://doi.org/10.1016/j.stress.2025.101046