Plant stem Flashcards
Provides the main axis to which leaves, flowers, and fruit is attached.
Stem
Connects the roots and the leaves
Stem
Classification of stems
Woody and herbaceous
the development of the stem starts from the _______ of the germinating leaves
plumule
regions where leaves and lateral branches may shoot out
nodes
spaces between nodes
internodes
_____ are usually erect and ascending
stem
breathing structures
lenticels
Acts as the covering and protection
epidermis
food-conducting vessel
phloem
thin layer of tissue found between the epidermis and the phloem
pericycle
area of cell growth
cambium
transport tubes for water
xylem
area where food is stored
pith
another term for pith
medulla
true or false: pith rays run perpendicular to the vascular bundles
true
comprises the majority of the stems of gymnosperm and dicots
Secondary stem tissue
lies between the xylem and the phloem
vascular cambium
creates new xylem ______
inside
creates new phloem _____
outside
the cork cambium forms the _______ to the outside
phellem or cork cells
the cork cambium forms ____ to the inside
phelloderm or parenchymal cells
has cuticle but no trichomes
Monocot
sclerenchyma forms the hypodermis
monocot
ground tissues are undifferentiated
Monocot
Vascular bundles are scattered
Monocot
Bundle cap is absent, but bundle sheath is present
monocot
closed with endarch xylem
Monocot
Secondary growth does not usually happen
Monocot
The epidermis has a cuticle and trichomes
Dicot
Collenchyma forms the hypodermis
Dicot
Ground tissues may be differentiated
Dicot
Bundle cap is present but bundle sheath is absent
Dicot
open with endarch xylem
Dicot
Secondary growth occurs
Dicot
______ may develop from auxilary plants to help support plants
Stem tendrils
Some stems may be modified for defense in the case of the _____ of the citrus
thorns
stems that extend laterally along the soil surface
stolons or runners
lateral branches that originate from the basal and underground portion of the main stem
suckers
structures that support the plant common among herbaceous plants
tendrils
hard and woody modifications for protection
thorns
fleshy stems used for storage
Bulbils
green branches that photosynthesize
Cladodes
multiple nodes and internodes compared to cladodes
Phylloclades
Are lateral branches with short internodes each bearing leaves and roots
Offsets