Primary tissues Flashcards
Gymnosperm means
developing seed exposed to atmosphere
angiosperm means
enclosed seed
What are the 2 subcatagories of Angiosperms
Monocots
Dicots
based on seed leaves
Monocot characteristics (6)
One seed leaf
Parallel
Flower parts in 3
Fibrous root system(lots of smaller roots)
Pollen most monosulcate (single pore)
<10% woody
Dicot characteristics(6)
two seed leafs
netted leaf veins
flowers in 4s and 5s
primary taproot
stem vascular bundles are in a ring
pollen mostly tricolpate
>50% woody
Meristem
tissues that contain actively dividing cells
4 types of meristems
Apical meristem
axillary buds give rise to axillary meristem
lateral meristem
intercalary meristem
DICOT- apical meristem
vegitative vs reproductive dicot
the top of the plant-adds to shoot length
vegitative- produces leaves
reproductive- produces flowers
the stem between 2 nodes
internode
DICOT what makes up a leaf
Lamina (leaf blade) and petiole(twiggy thang)
DICOT where does the leaf attach to the stem
node
DICOT Axillary bud location
and function
between stem and petiole
contains axillary meristem
gives rise to axillary branch or flowers
DICOT what hormone controls axillary bud
IAA- auxin
DICOT root morphology
taproot and series of lateral roots branching from it
apical meristem at root tip
MONOCOT apical meristem vegitative
the apical meristem is very close to soil surface and protected
produces leaves inserted at nodes, internodes are very short
MONOCOT leaves consist of
blade and sheath
MONOCOT where is the axillary bud located?
-in a tiller
-a leaf axial that can give rise to a branch
MONOCOT root system
fibrous root system
seminal root system(initial) replaced with adventitious roots
MONOCOTwhere do adventitious roots come from?
arise from nodes at base of stem
MONOCOT intercalary meristem
a meristem between 2 differentiated tissues
- longitudinal growth independent of apical meristem
leaf growth
MONOCOT where is intercalary meristem located
Nodes of grasses, responsible for culm(stem) extention
MONOCOT apical meristem reproductive
stops producing leaves and forms flowering structures
MONOCOT intercalary meristem reproductive
after apical meristem forms flower, pushes shit upwards on the culm
the lateral(secondary) meristems (2)
MOSTLY dicots
Vascular cambium
cork cambium
vascular cambium
produces secondary phloem and xylem
cork cambium
woody species
produces outer bark
secondary meristems add to
diameter and girth
the role of the apical meristem in roots and stems is to
generate new tissue and lengthen organs
The 3 primary (transitional) meristems that come from apical meristems
proctoderm, ground meristem, procambrium
proctoderm
forms epidermis, if damaged no other cells can do this
ground meristem, and what it consists of
forms cortex
parenchyma cells and collenchyma cells(alive at maturity)
Schlerenchyma cells (dead at maturity)
procambrium
produces vascular tissue that differentiate into xylem and phloem
primary tissues (5)
pith, cortex, primary xylem, primary phloem
Secondary tissues
cork, phelloderm???, secondary xylem, secondary phloem