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IMAGE imgs/220C_04Lecture04.gif

i. protoderm[!]epidermis
ii. ground meristem[!]cortex (ground tissue) iii. procambium[!]stele[!]xylem & phloem

b. shoot development35.21
i. modular
The growth of the root is continuous. In contrast, the growth of the shoot is quantized. Each apical bud produces one leaf-containing node and internode (stem) region and the next apical bud.

ii. axillary buds35.14 The apical meristem of shoots gives rise to the three primary meristems. As the shoot grows, leaf primordia form. Clumps of meristematic cells are left behind at the base of each leaf to form axillary buds.The axillary buds can give rise to side branches.

4. Secondary growth
a. lateral meristems
i. vascular cambium
(annual rings)

35.23, 31.24

[!]secondary xylem & phloem

ii. cork cambium[!]cork &phelloderm (bark)

II. Architecture of plant tissues
A. Root

35.15, 35.16

B. Stem

35.19

C. Leaf (lab)35.20, 10.2 Leaf 'hairs' reduce evaporation by reducing air flow across leaf surface.