ArticlePlant physiology2009
Phloem loading strategies in three plant species that transport sugar alcohols.
Article in Plant physiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.
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Who cites it
34 citing papers in PubMed, 81 citations in OpenAlex.
- Exploring the role of sugar alcohols in enhancing plant resilience to abiotic stresses.Protoplasma · 2026Review
- The sucrose-trehalose 6-phosphate nexus is conserved in flowering plants with different phloem loading and carbon storage strategies.Journal of experimental botany · 2026Article
- A linker histone acts as a transcription factor to orchestrate malic acid accumulation in apple in response to sorbitol.The Plant cell · 2024Article
- Significance of Raffinose Family Oligosaccharides (RFOs) metabolism in plants.Advanced biotechnology · 2024Review
- Evaluation of the Carbohydrate Composition of Crabapple Fruit Tissues Native to Northern Asia.Plants (Basel, Switzerland) · 2023Article
- SnRK1 kinase-mediated phosphorylation of transcription factor bZIP39 regulates sorbitol metabolism in apple.Plant physiology · 2023Article
- Distinct heat response molecular mechanisms emerge in cassava vasculature compared to leaf mesophyll tissue under high temperature stress.Frontiers in plant science · 2023Article
- Versatile roles of sorbitol in higher plants: luxury resource, effective defender or something else?Planta · 2022Review
- Mobile forms of carbon in trees: metabolism and transport.Tree physiology · 2022Review
- Recent Advances in Carbon and Nitrogen Metabolism in C3 Plants.International journal of molecular sciences · 2020Review
- A Sugar Transporter Takes Up both Hexose and Sucrose for Sorbitol-Modulated In Vitro Pollen Tube Growth in Apple.The Plant cell · 2020Article
- Sugar Metabolism in Stone Fruit: Source-Sink Relationships and Environmental and Agronomical Effects.Frontiers in plant science · 2020Review
- Fruit Salad in the Lab: Comparing Botanical Species to Help Deciphering Fruit Primary Metabolism.Frontiers in plant science · 2019Review
- Sorbitol Modulates Resistance toThe Plant cell · 2018Article
- Biosynthesis of quebrachitol, a transportable photosynthate, in Litchi chinensis.Journal of experimental botany · 2018Article
- Article
- Sugar metabolism and accumulation in the fruit of transgenic apple trees with decreased sorbitol synthesis.Horticulture research · 2018Article
- Suppression of cucumber stachyose synthase gene (CsSTS) inhibits phloem loading and reduces low temperature stress tolerance.Plant molecular biology · 2017Article
- Diffusion or bulk flow: how plasmodesmata facilitate pre-phloem transport of assimilates.Journal of plant research · 2015Review
- Transgenic approaches to altering carbon and nitrogen partitioning in whole plants: assessing the potential to improve crop yields and nutritional quality.Frontiers in plant science · 2015Review
Corrections and comments
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Authors and funding
5 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Many plants translocate sugar alcohols in the phloem. However, the mechanism(s) of sugar alcohol loading in the minor veins of leaves are debated. We characterized the loading strategies of two species that transport sorbitol (Plantago major and apple [Malus domestica]), and one that transports mannitol (Asarina scandens). Plasmodesmata are abundant at all interfaces in the minor vein phloem of apple, and in one of two types of phloem in the minor veins of A. scandens. Few plasmodesmata are present in the minor veins of P. major. Apple differs from the other two species in that sugar alcohol and sucrose (Suc) are present in much higher concentrations in leaves. Apple leaf tissue exposed to exogenous [(14)C]sorbitol, [(14)C]Suc, or (14)CO(2) did not accumulate radiolabel in the minor veins, as determined by macroautoradiography. P. major minor veins accumulated radiolabel from [(14)C]Suc, [(14)C]sorbitol, and (14)CO(2). A. scandens minor veins accumulated (14)C from [(14)C]Suc and (14)CO(2), but not from [(14)C]mannitol. We conclude that the movement of sugar alcohol from the mesophyll into the phloem in apple and A. scandens is symplastic and passive, but in P. major it involves an apoplastic step and is energized. We also suggest that apple leaves transport sorbitol in high concentrations to avoid the feedback limitation of photosynthesis that would result from driving passive movement of solute into the phloem with high levels of Suc alone. The loading pathways and the mechanisms by which hydrostatic pressure is maintained in the minor vein phloem of these species are discussed.
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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.