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Dic Medicinal plants (PG 101) Level 1 Clinical Pharmacy-PharmD
1- Leucoplasts
o They contain no chlorophyll and are known as colorless plastids.
o Leucoplast may form chlorophyll and become chloroplast, in this case, the
leucoplast is called proplastide.
o Leucoplasts are located in storage cells.
They are classified according to stored material into:
amyloplasts aleuroplasts elaioplasts
they contain starch they contain protein they contain oil droplets
granules grains
2- Chromoplasts
o They do not contain chlorophyll but contain carotenoid pigments and appear as
colored plastids. e.g., carrot and tomato.
3- Chloroplasts
o They contain chlorophyll.
o The chloroplasts is surrounded by two membranes.
o Chloroplast contains stacks of flattened organelles called a thylakoid. One stack
of thylakoids is called grana. Grana float within a cytoplasm-like fluid in the
chloroplast called stroma.
What is Function of chloroplasts:
- It is the organ for photosynthesis. The sunlight is trapped and converted to
chemical energy in grana.
f- Lysosomes
o These are simple spherical sacs bounded by single membrane and contain digestive
enzymes.
o They are frequently found in animal cells and rarely in plant cells
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