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.
only leaves have phloem and only roots have xylem. b. the cells of roots have cell walls that are lacking in leaf cells. c. a waxy cuticle covers leaves but is absent in roots. d. vascular tissue is found in roots but it is absent from leaves.nly leaves have phloem and only roots have xylem. b. the cells of roots have cell walls that are lacking in leaf cells. c. a waxy cuticle covers leaves but is absent in roots. d. vascular tissue is found in roots but it is absent from leaves.