cell content

Get Started. It's Free
or sign up with your email address
Rocket clouds
cell content by Mind Map: cell content

1. non-living cell content

1.1. ergastic cell content

1.1.1. stratch chracteristic granules size shape hilum striations aggregation frequency abundant in ground structures

1.1.2. protein in fruit and seeds as aleurone grains grystalloid globoid

1.2. the carbohydrates inulin and sinstrin

1.2.1. as needle-like crystals and fixed oil appears as globules

1.2.2. occurs mainly in seeds and fruits

1.3. waste products

1.3.1. ca(ox) various crystalline shapes prisms clusters raphides (form fronm needles) microcrystal size small (<5micron) medium large (>100 micron) frequency rare frequent numerous

1.3.2. ca(co3) amorphous masses or cystoliths incrusted into cell walls particularly those of trichomes

1.3.3. tannin deposited in dead areas of tissues suc as cork heartwood special tannin cells

2. living cell content

2.1. cellulose walls

2.1.1. parenchyama (basic cell) packing material

2.1.2. modified parenchyma with chloroplasts (chlorenchyma) photosynthesis food reserves position function surrounded by large air spaces (spongy mesophyll and aeranchyma) aeration aquatic plants buoyancy containing mucilage water storage modefied cell structure e.g. root hair water absorpation

2.1.3. collenchyma formation basic cell with secondary wall of cellulose or hemicellulose function mechanical support

2.1.4. sieve tubes (phloem) food conduction

2.1.5. some fibers

2.2. superised walls

2.2.1. cork produced by cork cambium(phellogen) protection deposit area for waste product e.g. tannin

2.2.2. endodermis-innermost layer of cortex of certain stems and all primary roots ,radial or radial and inner tangential walls only suberised water barrier

2.3. lignified walls

2.3.1. sclereids (stone cells) usually isodiametric structures function mainly mechanical support in fruits and seeds for protection

2.3.2. fibers forming usually elognated structure not always lignified function mechanical support

2.3.3. xaylem vessels forming tracheids,tracheidial vessels not lways lignified function water coduction

2.3.4. lignified parenchyma xylem-herbaceous & woody stems packing medullary ray-secondary roots food storage pith-herbaceous & woody stems mechanical support reticulate (fruits and seeds) mechanical support

2.3.5. endocarp (inner epidermis of pericarp) not always lignified occasionally food storage protection of seeds

2.3.6. seed testa (one of the layers of the inner or the outer testa) maybe combined with pigement protection of embryo

3. different type of cells and tissue

3.1. paranchyma

3.1.1. usually isodiametric

3.1.2. cellulose walls

3.1.3. intercellular spaces

3.2. collenchyma

3.2.1. slightly elongated

3.2.2. walls unevently thickened with cellulose

3.2.3. thickness is usually greatest at the corner

3.3. scalerenchyma (fibers)

3.3.1. much elongated

3.3.2. with tapering ends

3.3.3. dead when mature

3.3.4. characterstics thick walls narrow lumen absence of intercelluler spaces

3.4. xylem vessels

3.4.1. different patterns thicking asannular ofring spiral spiral reticulate or pitted network or pits scalariform when the pits are transversely extended the thicking

3.5. sieve tube and companion cells

3.5.1. sieve tube are elongated thin walled cells with perforated end wals referred to sieve plate

3.5.2. companion cells forming may be smooth striated in contact each sieve arepresent tube one or more of cells triangle combanion cells with dense contents

3.6. dermal tissue and epidermal characters

3.6.1. the surface of all primary plant organs is coverd by alayer of epidermals

3.6.2. usually one cell deep except in aquatic plants a cellulosic epidermals is covered by cutical of varying thickness

3.6.3. shape monocotyledonous plant organs elongated stems leaf midribsand petiols dicotyledonous plant organs polygonal common in all no air space between the cells certain cells are modified to form