 This study evaluated the effects of salt stress on the growth and development of spolarizer, a plant species with potential for biomass valorization in a circular economy. The results showed that spolarizer has high starch storage capacity under unfavorable conditions such as salt stress and nutrient deficiency, indicating new possibilities for its use in biofuel and bioethanol production. This article was authored by Z. Romanowski-Duda, K. Petrowski, S. Soufa, and others.