Summary
This greenhouse study examined how salinity stress and calcium supplementation alter mineral composition in two blueberry species grown in sand culture. Sodium accumulation in leaves increased dramatically with salinity (54-fold under Na₂SO₄), and calcium supplementation partially mitigated sodium uptake in rabbiteye cultivars but not when chloride was the anion. Potassium concentrations declined significantly under high salinity, particularly in roots, suggesting antagonistic interactions that may underlie observed leaf necrosis.
Regional applicability
The findings are relevant to horticultural practice in regions where blueberries are grown under saline irrigation conditions or in soils with elevated salt content. Applicability to United Kingdom outdoor production is limited, though the mechanistic insights on calcium–sodium–potassium interactions may inform protected cultivation or breeding programmes. Transferability to field conditions would require validation under non-controlled environments.
Key measures
Leaf, stem, and root concentrations of Na⁺, K⁺, Ca²⁺, and Cl⁻ (measured as percentage dry weight); fold-change in leaf Na⁺; percentage of total plant Na⁺ partitioned to leaves
Outcomes reported
The study measured leaf, stem, and root mineral concentrations (sodium, potassium, calcium, and chloride) in rabbiteye and southern highbush blueberry cultivars exposed to varying salinity levels and supplemental calcium treatments. Effects of calcium supplementation on sodium uptake and tissue distribution were quantified across plant organs.
Topic tags
Dig deeper with Pulse AI.
Ask about this record, its theme or its relevance to UK farming and policy. Pulse AI uses selected catalogue evidence and cites the sources it draws on.