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.
In botany, vascular tissues include xylem and phloem. Xylem is the type of vascular tissue that moves water and dissolved nutrients from the roots to the leaves. The xylem are â¦ one-way roads, however. No particles can move down the tree through the xylem.xygen diffuses directly from the air to corneal cells to keep the cornea transparent. There are fewer blood vessels in connective tissue and bone than in high metabolic areas such as muscle cells and organ cells, but blood vessels (vascular tissue) is found all over the body.