In view of the current, continuous decrease of water availability, the need to explore new mitigation alternatives has given focus to salt-tolerant genotypes. The aim of this work was to study salt tolerance of two ornamental cultivars of Glandularia (Glandularia x hybrida) of contrasting vigor, Dulce Coral and Extrema Violeta, breeded at the Floriculture Institute of INTA. A greenhouse experiment was carried out with potted plants. Plants were subjected to four salt treatments 1.2, 2.4, 3.5, 4.4 dS m⁻¹ (EC), and a control (0.03 dS m⁻¹). Shoot dry weight of Dulce Coral was not affected by salinity. In contrast, the dry weight of Extrema Violeta decreased sharply as salinity increased. The root:shoot ratio was always higher for Extrema Violeta than Dulce Coral. The leaves of Dulce Coral accumulated less Na⁺ and Cl⁻ than Extrema Violeta. Moreover, Extrema Violeta exhibited severe foliar salt damage, but Dulce Coral showed only a few, without compromising its commercial value. Besides, Dulce Coral had a higher assimilation rate than Extrema Violeta at all treatments. All these features could suggest Na⁺ and Cl⁻ exclusion as salt-tolerant mechanism for Dulce Coral. Other mechanisms adopted by Dulce Coral to cope with salinity was the maintenance of a higher K⁺/Na⁺ and Ca²⁺/Na⁺ ratio in its leaves, a lower root:shoot ratio and the maintenance of photosynthesis. Therefore, Dulce Coral could be proposed as a parent for breeding programs with the objective of improving salt tolerance in Glandularia. In this exploratory study, we distinguish some of the most important physiological (K⁺/Na⁺ and Ca²⁺/Na⁺) and morphological (root:shoot ratio) traits related to salinity tolerance in Glandularia.

中文翻译：

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形态和生理特性揭示了两个相对的腺体品种的耐盐性差异

鉴于当前水资源的持续减少，探索新的缓解方法的需求已将重点放在耐盐基因型上。这项工作的目的是研究两个观赏品种的耐盐性Glandularia（Glandularia x矮牵牛）对比活力，杜尔塞珊瑚和极值比奥莱塔，在INTA的花卉研究所育成。用盆栽植物进行了温室试验。使植物经受1.2、2.4、3.5、4.4 dS m ^-1（EC）和对照（0.03 dS m ^-1的四种盐处理））。杜尔塞珊瑚的茎干重量不受盐度的影响。相反，随着盐度的增加，Extrema Violeta的干重急剧下降。Extrema Violeta的root：shoot比率始终高于Dulce Coral。杜尔塞珊瑚的叶子积累较少的Na ⁺和Cl ^-比极值维奥莱塔。此外，Extrema Violeta表现出严重的叶面盐害，但Dulce Coral仅显示了少量，而没有损害其商业价值。此外，在所有处理中，杜尔塞珊瑚（Dulce Coral）的同化率均高于极微菌。所有这些特性可以建议的Na ⁺ 和Cl ^-排除为耐盐机制杜尔塞珊瑚。杜尔塞·科勒尔（Dulce Coral）为应对盐度而采用的其他机制是维持较高的钾叶片中的⁺ / Na ⁺和Ca ²⁺ / Na ⁺比率，较低的根：茎比率和维持光合作用。因此，Dulce Coral可以作为育种计划的父母，以提高腺体的耐盐性为目标。在这项探索性研究中，我们区分了一些与腺体耐盐性相关的最重要的生理（K ⁺ / Na ⁺和Ca ²⁺ / Na ⁺）和形态（根：茎比）性状。