Some strains of S marcescens are capable of producing a pigment called prodigiosin, which ranges in color from dark red to pale pink, depending on the age of the colonies.
Vascular Tissue: the xylem and phloem in leaves are confined to vascular bundles or veins. Veins are surrounded by a layer of cells call the bundle sheath. The bundle sheath can be composed of parenchyma, colenchyma, or fibers.
What makes up the veins in the leaf? The veins are made up of both xylem and phloem vessels. Xylem: tubes that brings water and minerals from the roots into the leaf.Phloem: tubes that usually move sap, with disâ¦solved sucrose, produced by photosynthesis in the leaf, out of the leaf.