ArticlePlant, cell & environment2026
Vein-Specific Overexpression of Galactinol Synthase Gene Improves Salinity Tolerance in Poplar.
Article in Plant, cell & environment, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Vein vasculature plays a key role in the translocation and metabolism of soluble carbohydrates from source to sink tissues in higher plants. Most prior research has focused on the storage or transport functions of raffinose family oligosaccharides (RFOs) in apoplastic and polymer-trapping plants, yet little is known about vein-localized RFOs in plants with passive symplastic phloem loading. In this study, the transgenic lines of poplar, a model tree with passive symplastic phloem loading, were generated to ectopically express the galactinol synthase gene, which catalyzes the first committed step in RFO biosynthesis, specifically in leaf veins. Under normal growth conditions, the engineered poplars developed a more vigorous root system compared to non-transgenic controls. When exposed to salinity stress, they exhibited significantly enhanced tolerance, which was associated with reduced foliar Na
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