Figure 35.2 Reproductive shoot (flower) Apical bud Node Internode Apical bud Vegetative shoot Leaf Blade Petiole Stem Taproot Lateral (branch) roots Shoot system Root system Axillary bud

Figure 35.1

Figure 35.4c “Strangling” aerial roots

The vascular tissue system carries out long- distance transport of materials between roots and shoots The two vascular tissues are xylem and phloem Xylem conveys water and dissolved minerals upward from roots into the shoots Phloem transports organic nutrients from where they are made to where they are needed © 2011 Pearson Education, Inc.

Vessel elements are common to most angiosperms and a few gymnosperms Vessel elements align end to end to form long micropipes called vessels © 2011 Pearson Education, Inc.

Vessel elements are common to most angiosperms and a few gymnosperms Vessel elements align end to end to form long micropipes called vessels © 2011 Pearson Education, Inc.

Figure 35.10d Vessel Tracheids 100  m Tracheids and vessels (colorized SEM) Perforation plate Vessel element Vessel elements, with perforated end walls Pits Tracheids

Sugar-Conducting Cells of the Phloem Sieve-tube elements are alive at functional maturity, though they lack organelles Sieve plates are the porous end walls that allow fluid to flow between cells along the sieve tube Each sieve-tube element has a companion cell whose nucleus and ribosomes serve both cells © 2011 Pearson Education, Inc.

Sieve-tube element (left) and companion cell: cross section (TEM) Sieve-tube elements: longitudinal view Sieve plate 3  m Companion cells Sieve-tube elements Plasmodesma Sieve plate Nucleus of companion cell Sieve-tube elements: longitudinal view (LM) 30  m 15  m Sieve plate with pores (LM) Figure 35.10e

Figure Epidermis Cortex Root hair Vascular cylinder Zone of differentiation Zone of elongation Zone of cell division (including apical meristem) Key to labels Root cap Dermal Ground Vascular Mitotic cells 100  m

Key to labels Dermal Ground Vascular Cuticle Bundle- sheath cell Xylem Phloem Sclerenchyma fibers Stoma Upper epidermis Palisade mesophyll Spongy mesophyll Lower epidermis Cuticle Vein Guard cells (a) Cutaway drawing of leaf tissues Figure 35.18a