Page 135 - Ultimate Visual Dictionary (DK)

ROOTS
PRIMARY ROOT AND MICROGRAPHS OF SECTIONS THROUGH ROOTS
Stele
(vascular
Lateral root cylinder)

Apical meristem Primary root
(region of actively
dividing cells)
Elongating region
Root cap
(protects
dividing Epidermis
cells) (outer layer
of cells) Cortex
(layer between
epidermis and Epidermis
Stele vascular tissue) (outer layer
(vascular of cells)
cylinder)
CROSS-SECTION THROUGH ROOT OF BUTTERCUP
(Ranunculus sp.)
Cortex
(layer between Cortex Epidermis
epidermis and (layer between (outer layer
Lateral root vascular tissue) epidermis and of cells)
vascular tissue)
CROSS-SECTION THROUGH ROOT OF FAVA BEAN
(Vicia faba)
Endodermis
(inner layer
Cortex of cortex)
Stele (layer between
(vascular epidermis and
Epidermis cylinder) vascular tissue) Phloem
(outer layer
of cells) Root tip Metaxylem
(region of Stele Protoxylem
cell division) (vascular
cylinder) Pericycle
(outer layer)
PRIMARY ROOT OF FAVA BEAN
(Vicia faba)
CROSS-SECTION THROUGH ROOT OF LILY
(Lilium sp.)
Cortex
(layer between
epidermis and Epidermis
vascular tissue)

Elongating region

Stele
(vascular
cylinder)

Apical meristem
(region of actively
dividing cells)
Hyphae of fungus
Root cap in mycorrhizal
(protects (symbiotic) association Starch grain
dividing cells) with orchid
LONGITUDINAL SECTION CROSS-SECTION THROUGH ROOT OF ORCHID IN
THROUGH ROOT TIP OF FAVA BEAN MYCORRHIZAL ASSOCIATION WITH FUNGUS
(Vicia faba)
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