ArticleJournal of experimental botany2008
Futile Na+ cycling at the root plasma membrane in rice (Oryza sativa L.): kinetics, energetics, and relationship to salinity tolerance.
Article in Journal of experimental botany, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.
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Who cites it
28 citing papers in PubMed, 97 citations in OpenAlex.
- Application of growth promoting hormones alters the composition and antioxidant potential of dill essential oil under salt stress.Scientific reports · 2022Article
- Salt tolerance mechanisms in theAoB PLANTS · 2022Review
- Proto Kranz-like leaf traits and cellular ionic regulation are associated with salinity tolerance in a halophytic wild rice.Stress biology · 2022Article
- Empowering roots-Some current aspects of root bioenergetics.Frontiers in plant science · 2022Review
- NADPH Oxidase-derived ROS promote mitochondrial alkalization under salt stress inPlant signaling & behavior · 2021Article
- Functions and structure of roots and their contributions to salinity tolerance in plants.Breeding science · 2021Article
- Mechanisms of Plant Responses and Adaptation to Soil Salinity.Innovation (Cambridge (Mass.)) · 2020Review
- Can Alternative Metabolic Pathways and Shunts Overcome Salinity Induced Inhibition of Central Carbon Metabolism in Crops?Frontiers in plant science · 2020Review
- A Comprehensive Biophysical Model of Ion and Water Transport in Plant Roots. III. Quantifying the Energy Costs of Ion Transport in Salt-Stressed Roots ofFrontiers in plant science · 2020Article
- A Comprehensive Biophysical Model of Ion and Water Transport in Plant Roots. II. Clarifying the Roles of SOS1 in the Salt-Stress Response inFrontiers in plant science · 2019Article
- Plant Salinity Stress: Many Unanswered Questions Remain.Frontiers in plant science · 2019Review
- Membrane fluxes, bypass flows, and sodium stress in rice: the influence of silicon.Journal of experimental botany · 2018Article
- Mapping the microRNA Expression Profiles in Glyoxalase Over-expressing Salinity Tolerant Rice.Current genomics · 2018Article
- The Role of NaFrontiers in physiology · 2017Review
- The Role of Silicon in Higher Plants under Salinity and Drought Stress.Frontiers in plant science · 2016Review
- Comparison between Arabidopsis and Rice for Main Pathways of K(+) and Na(+) Uptake by Roots.Frontiers in plant science · 2016Review
- The Thermodynamic Flow-Force Interpretation of Root Nutrient Uptake Kinetics: A Powerful Formalism for Agronomic and Phytoplanktonic Models.Frontiers in physiology · 2016Review
- Measurement of Differential Na(+) Efflux from Apical and Bulk Root Zones of Intact Barley and Arabidopsis Plants.Frontiers in plant science · 2016Article
- Quantitative description of ion transport via plasma membrane of yeast and small cells.Frontiers in plant science · 2015Review
- The role of a potassium transporter OsHAK5 in potassium acquisition and transport from roots to shoots in rice at low potassium supply levels.Plant physiology · 2014Article
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
Globally, over one-third of irrigated land is affected by salinity, including much of the land under lowland rice cultivation in the tropics, seriously compromising yields of this most important of crop species. However, there remains an insufficient understanding of the cellular basis of salt tolerance in rice. Here, three methods of 24Na+ tracer analysis were used to investigate primary Na+ transport at the root plasma membrane in a salt-tolerant rice cultivar (Pokkali) and a salt-sensitive cultivar (IR29). Futile cycling of Na+ at the plasma membrane of intact roots occurred at both low and elevated levels of steady-state Na+ supply ([Na+]ext=1 mM and 25 mM) in both cultivars. At 25 mM [Na+]ext, a toxic condition for IR29, unidirectional influx and efflux of Na+ in this cultivar, but not in Pokkali, became very high [>100 micromol g (root FW)(-1) h(-1)], demonstrating an inability to restrict sodium fluxes. Current models of sodium transport energetics across the plasma membrane in root cells predict that, if the sodium efflux were mediated by Na+/H+ antiport, this toxic scenario would impose a substantial respiratory cost in IR29. This cost is calculated here, and compared with root respiration, which, however, comprised only approximately 50% of what would be required to sustain efflux by the antiporter. This suggests that either the conventional 'leak-pump' model of Na+ transport or the energetic model of proton-linked Na+ transport may require some revision. In addition, the lack of suppression of Na+ influx by both K+ and Ca2+, and by the application of the channel inhibitors Cs+, TEA+, and Ba2+, questions the participation of potassium channels and non-selective cation channels in the observed Na+ fluxes.
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