ArticlePLoS genetics2019
polyamine uptake transporter 2 (put2) and decaying seeds enhance phyA-mediated germination by overcoming PIF1 repression of germination.
Article in PLoS genetics, 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, 19 citations in OpenAlex.
- Integrated metabolome and transcriptome analyses reveal the metabolic regulation of Anoectochilus roxburghii (Wall.) Lindl. in response to light quality.Analytical and bioanalytical chemistry · 2025Article
- The polyamine uptake transporters PUT2/LAT4 and PUT5/LAT5 contribute to Arabidopsis defense response againstPhysiology and molecular biology of plants : an international journal of functional plant biology · 2025Article
- HB52-PUT2 Module-Mediated Polyamine Shoot-to-Root Movement Regulates Salt Stress Tolerance in Tomato.Plant, cell & environment · 2025Article
- Influence of aPlants (Basel, Switzerland) · 2023Article
- Genome-Wide Identification and Characterization of the Polyamine Uptake Transporter (Put) Gene Family in Tomatoes and the Role of Put2 in Response to Salt Stress.Antioxidants (Basel, Switzerland) · 2023Article
- Light Spectral Composition Modifies Polyamine Metabolism in Young Wheat Plants.International journal of molecular sciences · 2022Article
- Changes in genotoxic stress response, ribogenesis and PAP (3'-phosphoadenosine 5'-phosphate) levels are associated with loss of desiccation tolerance in overprimed Medicago truncatula seeds.Plant, cell & environment · 2022Article
- An Updated Overview on the Regulation of Seed Germination.Plants (Basel, Switzerland) · 2020Review
- Regulation of Photomorphogenic Development by Plant Phytochromes.International journal of molecular sciences · 2019Review
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Red light promotes germination after activating phytochrome phyB, which destabilizes the germination repressor PIF1. Early upon seed imbibition, canopy light, unfavorable for photosynthesis, represses germination by stabilizing PIF1 after inactivating phyB. Paradoxically, later upon imbibition, canopy light stimulates germination after activating phytochrome phyA. phyA-mediated germination is poorly understood and, intriguingly, is inefficient, compared to phyB-mediated germination, raising the question of its physiological significance. A genetic screen identified polyamine uptake transporter 2 (put2) mutants that overaccumulate polyamines, a class of antioxidant polycations implicated in numerous cellular functions, which we found promote phyA-mediated germination. In WT seeds, our data suggest that canopy light represses polyamines accumulation through PIF1 while red light promotes polyamines accumulation. We show that canopy light also downregulates PIF1 levels, through phyA; however, PIF1 reaccumulates rapidly, which limits phyA-mediated germination. High polyamines levels in decaying seeds bypass PIF1 repression of germination and stimulate phyA-mediated germination, suggesting an adaptive mechanism promoting survival when viability is compromised.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.