04 - Simple plant tissues

what do differentiated plant cells make up

simple or complex plant tissues

what is a simple tissue

tissues made out of one cell type

what is a complex tissue

tissues made out of more than one cell type

types of simple plant tissues

parenchyma

collenchyma

sclerenchyma

characteristics of parenchyma

most common cell type

Alive - have organelles

Thin-walled

Least specialized

Often block-shaped

Parenchyma: main functions

Space filler

Photosynthesis

Storage

chlorenchyma

Aka parenchyma with chloroplasts

what is chlorenchyma made up of

palisade parenchyma and spongy parenchyma

Parenchyma for storage

in Water, nutrients (roots, leaves, seeds, fruits)

stores protein starch

Collenchyma characteristics

Alive

Elongated

Thickened in cell corners

function for collenchyma

flexible support in young stems, roots, petioles or around vascular bundles

differance between collenchyma and parenchyma

collenchyma have thicker cell wall

Typical locations of collenchyma

surrounding vascular bundles

characteristics Sclerenchyma

Dead at maturity, cell interior almost completely filled

Cell walls thickened with cellulose and usually enforced with lignin

expensive to produce

function of Sclerenchyma

structural strength

main types of Sclerenchyma

sclereids (stuby and short)

fiber (narrow and long)

sclereids characteristics

Short cells, often branched

Occurrence: single or aggregated

where do sclereids occurs

Hard seed coats, shells of nuts, pear flesh

common place for fibers

fax plasnts

fiber charcteristics

long and narrow

What are the correct names for three most basic, simple plant cell types?

Parenchyma, Collenchyma, Sclerenchyma

Which of the following is a little more specialized type of parenchyma?

Chlorenchyma

Which basic plant cell type is dead at maturity and is (sparingly) used for structural strength?

Sclereid, Sclerenchyma, fiber

Typically the most common cell in the mesophyll -

parenchyma

Often used for storage -

parenchyma

Dead at maturity, thickened cell walls and long and thin - 

sclerenchyma, fiber

Mostly block-shaped and least specialized - 

parenchyma

Elongated, alive at maturity and with enforced cell walls -

collenchyma

Typically thin-walled and alive at maturity -

parenchyma

Typically thickened especially in the cell wall corners, alive - 

collenchyma

Dead at maturity, thickened cell walls and star or block-shaped -

sclerenchyma

Renders pears gritty and seemingly sandy when chewing on their flesh -

sclerenchyma

Renders cherry pits hard -

sclerenchyma

Renders nuts healthy, caloric and tasty -

parenchyma

Renders apples juicy and sweet -

parenchyma

makes peannuts hard

sclerenchyma