Akademik Veri Yönetim Sistemi
TURKISH JOURNAL OF BOTANY, cilt.49, sa.4, ss.304-313, 2025 (SCI-Expanded)
Safflower (Carthamus tinctorius L.) is a widely studied plant due to its resistance to abiotic stress, suitability for both summer and winter cultivation, and richness in nutrients and linoleic acid. Thus, it has become more important compared to other oil plants in recent years. Weed infestation affects the growth of this cultivated plant during the greening period. S-metolachlor is a widely used herbicide that prevents the growth of weeds. In this study, three different doses of S-metolachlor (1, 2, and 4 g of active substance per liter) were applied to two safflower genotypes (Din & ccedil;er and Remzibey-05), and their effects on oleic and linoleic acid contents were assessed. A decrease in oleic acid content was observed in the Remzibey-05 genotype at all herbicide doses. In contrast, only the 1 g active substance/L caused a decrease in the Din & ccedil;er genotype. Linoleic acid content increased in both genotypes. In the early growing period of safflower genotypes, the expression levels of certain fatty acid desaturase genes (CtFAD2-1, CtFAD3, CtFAD6, and CtFAD7) were measured to investigate fatty acid proportions and conversions. The expression of CtFAD2-1 and CtFAD6 genes, which are responsible for converting oleic acid to linoleic acid, was generally reduced compared to the control. A decrease was observed in the expression of CtFAD3 and CtFAD7 genes, which are responsible for converting linoleic acid to linolenic acid.