Elucidation of the Impact of Lead Chloride on Growth Characteristics and Chlorophyll Content in Two Varieties of Sunflower (Helianthus annuus L.): Effect of Lead Chloride on Sunflower. Biological Sciences - PJSIR, [S. l.], v. 69, n. 1, p. 1–8, 2026. DOI: 10.52763/PJSIR.BIOL.SCI.69.1.2026.1.8. Disponível em: https://v2.pjsir.org/index.php/biological-sciences/article/view/3160. Acesso em: 10 mar. 2026.