Sjölund RD. Changes in Chloroplast Structure During Differentiation of Phloem Sieve Elements and Xylem Vessels from Green Callus Tissue of Streptanthus Tortuosus. acta [nternet]. 1Mar.1992 [cited 24Nov.2024];1(1):109-14. vailable from: https://acta-microscopica.org/acta/article/view/16