Effects of Salt Treatments at Different Concentrations on the Growth and Quality of Chinese Flowering Cabbage

XIE Xiaoyu; LIU Ying; WEN Junlang; WANG Tingqin

doi:10.19590/j.cnki.1008-1038.2025.12.008

Abstract：To investigate the effects of salt stress on the growth and quality of Chinese flowering cabbage(Brassica rapa var.parachinensis)during the germination and seedling stages,aiming to provide theoretical guidance for its production in saline-alkali soils,the Chinese flowering cabbage cultivar'720'was used as the test material.Salt stress treatments were applied at different concentrations(50,100,150,200,250 mmol/L).The effects of salt stress at various concentrations on germination rate as well as morphological and physiological indicators during the seedling stage were comparatively analyzed.Results showed that salt stress inhibited seed germination,with the lowest germination rate(35.3%)observed under the 250 mmol/L salt treatment.A low salt concentration treatment(50 mmol/L)had minimal impact on growth.Under medium to high salt concentrations(100-250 mmol/L),membrane permeability,peroxidase(POD)activity,malondialdehyde(MDA)content,and proline content increased,whereas chlorophyll content,soluble protein content,superoxide dismutase(SOD)activity,and catalase(CAT)activity decreased.Salt treatment significantly inhibited seed germination,with germination rate decreasing progressively as salt concentration increased.Seedlings exhibited relatively strong salt tolerance under the 50 mmol/L low salt conditions.However,under the 100-250 mmol/L medium and high salt concentrations,salt tolerance gradually declined with increasing salt levels and duration of exposure.This study,by determining changes in morphological and physiological indices of Chinese flowering cabbage under different salt concentrations,provides references for its cultivation and breeding in saline soils.