Work

Chloride Salts and Light Modulate Germination and Early Seedling Performance in Dittrichia viscosa

Year: 2026

Type: article

Abstract: Soil salinity is one of the main environmental factors limiting plant germination and establishment, particularly in Mediterranean ecosystems. This study evaluated the germination, recovery and early development of Dittrichia viscosa exposed to NaCl, KCl, CaCl₂, MgCl₂ and an equimolar mixture (0–360 mM), under 12-hour light–dark regimen and continuous darkness. In the absence of salt, final germination was similar under both regimes, although it was faster in the dark. Increased salt concentration reduced and delayed germination, depending on the type of salt and the light regime. KCl maintained the highest germination percentages under light-dark regime at 90 and 180 mM, whilst CaCl₂ and MgCl₂ were the most inhibitory individual salts at 180 mM. The salt mixture was the most restrictive under both regimes. Following transfer to a salt-free medium, ungerminated seeds showed a high rate of recovery even after exposure to the highest concentrations of individual salts, indicating that the inhibition was largely reversible. The first two components of the PCA explained 71.89% of the variation and linked germination and its rate to seedling vigour. Overall, D. viscosa showed considerable germination tolerance to individual salts, but high sensitivity to their combined action.

Source: Plants

DOI: 10.3390/plants15172607

Authors: María del Pilar Cordovilla, Isidro Sánchez, Marlene Gladys Aguilar, Manuel Melendo

Institutions: Universidad de Jaén, Universidad Nacional Agraria La Molina

Language: English

Topic: Seed Germination and Physiology

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: gold

Estimated APC paid: $3,258