ArticleThe Plant cell1999
LeProT1, a transporter for proline, glycine betaine, and gamma-amino butyric acid in tomato pollen.
Article in The Plant cell, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 91 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
91 citing papers in PubMed, 252 citations in OpenAlex.
- Review
- Beyond osmoprotection: the expanding roles of proline in plant signalling and development.Biologia futura · 2026Review
- Unveiling the temporal and spatial trajectories of early resistance formation during Hylocereus undatus senescence through single-cell transcriptomics.Plant molecular biology · 2025Article
- Extreme heat affects blueberry pollen nutrition, bee health, and plant reproduction.Scientific reports · 2025Article
- The amino acid permeaseHorticulture research · 2025Article
- Proline Tagging for Stress Tolerance in Plants.International journal of genomics · 2025Review
- Proline and ROS: A Unified Mechanism in Plant Development and Stress Response?Plants (Basel, Switzerland) · 2024Review
- Physiological and metabolic analyses reveal the proline-mediated flowering delay mechanism inFrontiers in plant science · 2024Article
- Genome-Wide Identification of Proline Transporter Gene Family in Non-Heading Chinese Cabbage and Functional Analysis ofInternational journal of molecular sciences · 2023Article
- GABA Metabolism, Transport and Their Roles and Mechanisms in the Regulation of Abiotic Stress (Hypoxia, Salt, Drought) Resistance in Plants.Metabolites · 2023Review
- ThePlants (Basel, Switzerland) · 2023Article
- GC-MS and UHPLC-QTOFMS-assisted identification of the differential metabolites and metabolic pathways in key tissues ofFrontiers in plant science · 2023Article
- Proline Affects Flowering Time in Arabidopsis by Modulating FLC Expression: A Clue of Epigenetic Regulation?Plants (Basel, Switzerland) · 2022Article
- Contribution of Exogenous Proline to Abiotic Stresses Tolerance in Plants: A Review.International journal of molecular sciences · 2022Review
- The Influence of the Partitioning of Sugars, Starch, and Free Proline in Various Organs ofPlants (Basel, Switzerland) · 2022Article
- Article
- Intriguing Role of Proline in Redox Potential Conferring High Temperature Stress Tolerance.Frontiers in plant science · 2022Review
- Comprehensive Genome-Wide Identification and Transcript Profiling of GABA Pathway Gene Family in Apple (Genes · 2021Article
- Article
- γ-Aminobutyrate (GABA) Regulated Plant Defense: Mechanisms and Opportunities.Plants (Basel, Switzerland) · 2021Review
31 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
During maturation, pollen undergoes a period of dehydration accompanied by the accumulation of compatible solutes. Solute import across the pollen plasma membrane, which occurs via proteinaceous transporters, is required to support pollen development and also for subsequent germination and pollen tube growth. Analysis of the free amino acid composition of various tissues in tomato revealed that the proline content in flowers was 60 times higher than in any other organ analyzed. Within the floral organs, proline was confined predominantly to pollen, where it represented >70% of total free amino acids. Uptake experiments demonstrated that mature as well as germinated pollen rapidly take up proline. To identify proline transporters in tomato pollen, we isolated genes homologous to Arabidopsis proline transporters. LeProT1 was specifically expressed both in mature and germinating pollen, as demonstrated by RNA in situ hybridization. Expression in a yeast mutant demonstrated that LeProT1 transports proline and gamma-amino butyric acid with low affinity and glycine betaine with high affinity. Direct uptake and competition studies demonstrate that LeProT1 constitutes a general transporter for compatible solutes.
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