ArticlePlant physiology1999
Rates of sugar uptake by guard cell protoplasts of pisum sativum L. Related To the solute requirement for stomatal opening
Article in Plant physiology, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.
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Who cites it
22 citing papers in PubMed, 72 citations in OpenAlex.
- Illuminating stomatal responses to red light: establishing the role of Ci-dependent versus -independent mechanisms in control of stomatal behaviour.Journal of experimental botany · 2024Article
- Article
- Grape ASR Regulates Glucose Transport, Metabolism and Signaling.International journal of molecular sciences · 2022Article
- Glucose uptake to guard cells via STP transporters provides carbon sources for stomatal opening and plant growth.EMBO reports · 2020Article
- Guard Cell Starch Degradation Yields Glucose for Rapid Stomatal Opening in Arabidopsis.The Plant cell · 2020Article
- Role of blue and red light in stomatal dynamic behaviour.Journal of experimental botany · 2020Review
- Sugar Beet (International journal of molecular sciences · 2020Article
- Toward multifaceted roles of sucrose in the regulation of stomatal movement.Plant signaling & behavior · 2018Article
- The Membrane Transport System of the Guard Cell and Its Integration for Stomatal Dynamics.Plant physiology · 2017Review
- Integrative field scale phenotyping for investigating metabolic components of water stress within a vineyard.Plant methods · 2017Article
- Rethinking Guard Cell Metabolism.Plant physiology · 2016Review
- Relationships of Leaf Net Photosynthesis, Stomatal Conductance, and Mesophyll Conductance to Primary Metabolism: A Multispecies Meta-Analysis Approach.Plant physiology · 2016Review
- Multi-level modeling of light-induced stomatal opening offers new insights into its regulation by drought.PLoS computational biology · 2014Article
- Introns control expression of sucrose transporter LeSUT1 in trichomes, companion cells and in guard cells.Plant molecular biology · 2008Article
- Pathways of glucose regulation of monosaccharide transport in grape cells.Plant physiology · 2006Article
- Structure, expression, and functional analysis of the hexokinase gene family in rice (Oryza sativa L.).Planta · 2006Article
- Wounding enhances expression of AtSUC3, a sucrose transporter from Arabidopsis sieve elements and sink tissues.Plant physiology · 2004Article
- Diurnal and light-regulated expression of AtSTP1 in guard cells of Arabidopsis.Plant physiology · 2003Article
- Metabolite export of isolated guard cell chloroplasts of Vicia faba.The New phytologist · 2003Article
- Red light activates a chloroplast-dependent ion uptake mechanism for stomatal opening under reduced COThe New phytologist · 2002Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We wished to determine whether the capacity of the sugar uptake mechanisms of guard cells of the Argenteum mutant of pea (Pisum sativum L.) sufficed to support a concurrent stomatal opening movement. Sugar uptake by guard cell protoplasts was determined by silicone-oil-filtering centrifugation. The protoplasts took up [(14)C]glucose, [(14)C]fructose, and [(14)C]sucrose (Suc), apparently in symport with protons. Mannose, galactose, and fructose competed with Glc for transport by a presumed hexose carrier. The uptake of Glc saturated with a K(m) of 0.12 mM and a V(max) of 19 fmol cell(-1) h(-1). At external concentrations <1 mM, the uptake of Suc was slower than that of Glc. It exhibited a saturating component with a K(m) varying between 0.25 and 0.8 mM and a V(max) between 1 and 10 fmol cell(-1) h(-1), and at external concentrations >1 mM, a non-saturating component. At apoplastic sugar concentrations below 4 mM, sugar import was estimated to be mainly in the form of hexoses and too slow to support a simultaneous stomatal opening movement. If, however, during times of high photosynthesis and transpiration, the apoplastic Suc concentration rose and entered the range of non-saturating import, absorbed Suc could replace potassium malate as the osmoticum for the maintenance of stomatal opening.
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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.