Soil salinity seriously restricts agricultural production, especially for salt-sensitive crops. Understanding salt-tolerant plants will open new opportunities to crop breeders in attempts to increase salt tolerance in conventional crops. However, until now, few fundamental research findings related to halophytes have been applied to crop plants. Research has shown that apoplastic barriers, including Casparian bands (CBs) and suberin lamellae (SL), play an important role in Na⁺ and Cl⁻ exclusion in both a few reported cases in halophytes and in some crop plants. In this paper, we discuss the role of CBs and SL in ion exclusion during plant salt tolerance, to evaluate whether they should be a key target for breeding salt-tolerant crops.

土壤盐分严重制约了农业生产，特别是对盐敏感作物。了解耐盐植物将为作物育种者提供新的机会，以尝试提高传统作物的耐盐性。然而，到目前为止，很少有与盐生植物相关的基础研究成果应用于作物植物。研究表明，质外体屏障，包括凯斯帕带 (CBs) 和木栓质层 (SL)，在盐生植物和一些作物植物中的少数报道案例中，在Na ⁺和 Cl ^-排除方面发挥着重要作用。在本文中，我们讨论了 CBs 和 SL 在植物耐盐期间离子排斥中的作用，以评估它们是否应该成为培育耐盐作物的关键目标。