ArticleMolecular biology reports2015
A vacuolar antiporter is differentially regulated in leaves and roots of the halophytic wild rice Porteresia coarctata (Roxb.) Tateoka.
Article in Molecular biology reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 22 citations in OpenAlex.
- Rice Adaptation to Abiotic Stresses Caused by Soil Inorganic Elements.International journal of molecular sciences · 2025Review
- Ajay Kumar Parida (1963-2022), an eminent plant biotechnologist with a passion for mangrove biology.Physiology and molecular biology of plants : an international journal of functional plant biology · 2023Article
- Comparative Analysis of Root Na+ Relation under Salinity between Oryza sativa and Oryza coarctataPlants (Basel, Switzerland) · 2022Article
- Evolutionary Significance of NHX Family and NHX1 in Salinity Stress Adaptation in the GenusInternational journal of molecular sciences · 2022Article
- Back to the Wild: On a Quest for Donors Toward Salinity Tolerant Rice.Frontiers in plant science · 2020Review
- Distinct Evolutionary Origins of Intron Retention Splicing Events inFrontiers in plant science · 2020Article
- A walk on the wild side: Oryza species as source for rice abiotic stress tolerance.Genetics and molecular biology · 2017Article
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4 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Vacuolar NHX-type antiporters play a role in Na(+)/K(+) uptake that contributes to growth, nutrition and development. Under salt/osmotic stress they mediate the vacuolar compartmentalization of K(+)/Na(+), thereby preventing toxic Na(+)K(+) ratios in the cytosol. Porteresia coarctata (Roxb.) Tateoka, a mangrove associate, is a distant wild relative of cultivated rice and is saline as well as submergence tolerant. A vacuolar NHX homolog isolated from a P. coarctata cDNA library (PcNHX1) shows 96 % identity (nucleotide level) to OsNHX1. Diurnal PcNHX1 expression in leaves was found to be largely unaltered, though damped by salinity. PcNHX1 promoter directed GUS expression is phloem-specific in leaves, stem and roots of transgenic plants in the absence of stress. Under NaCl stress, GUS expression was also seen in the epidermal and sub-epidermal layers (mesophyll, guard cells and trichomes) of leaves, root tip. The salinity in the rhizosphere of P. coarctata varies considerably due to diurnal/semi-diurnal tidal inundation. The diurnal expression of PcNHX1 in leaves and salinity induced expression in roots may have evolved in response to dynamic changes in salinity of in the P. coarctata rhizosphere. Despite high sequence conservation between OsNHX1 and PcNHX1, the distinctive expression pattern of PcNHX1 exemplifies how variation in expression is fine tuned to suit the halophytic growth habitat of a plant.
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