From Cambium to Early Cell Differentiation Within the Secondary Vascular System

摘要: Publisher Summary Vascular cambium of both roots and shoots contains two types cells: long, spindle-shaped fusiform cells smaller, cuboidal ray parenchyma cells. Ray initials are regularly interspersed with the on cambial perimeter radially elongated files to which they give rise intrude, like spokes a bicycle wheel, into secondary xylem phloem. Irrespective whether or cells, initial bidirectional in their cell production. Each produces alternating sequences new from either its inward- outward-facing surfaces that pass phloem domains, respectively. Among differentiated produced by those have become adapted for long-distance vertical transport solutes (tracheids, vessel elements, sieve cells) assistance these processes. Other (fibers, also tracheids) mechanical support plant. synthesize metabolites interior wood, as well storing transporting trophic materials cambium. From point view, rays physically bolt together annual rings xylem, thus preventing shearing groups when stem is bent. This chapter highlights features meristem, mainly trees, bear development radial systems stems discusses some earliest stages vessel, phloem, development.