DEFINITIONS AND KEY POINTS OF ULTRASTRUCTURE1

TERMS                   11 DEFINITIONS
Plastids The     membranous  bound   and    pigment

containing bodies present in the cell are called plastids.

l’rotoplastid The newIN form plastid is called protoplastid.
I:floplast It then changes into etioplast. Etioplast grows to form complete plastids.
Chloroplast The   membrane            bound     structure.        containing

green    pigment    chlorophyll      is   called
chloroplast.

Stroma Stroma   is    a    fluid   that   surrounds  the

th)lakoids.

Cranum A granum   is pile of thylakoids. stacked on

each other like coil

Chromoplast ‘Hieplastidscontaining  coloured        pigments


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other than chloroplw H are called chromolast.

Leucoplast The colourless plastids are called leucoplasts.
Amyloplasts

The   starch  storing  leucoplasts        are        called
Aleuroplast The   proteinstoring  leucoplasts        are        called
Lipoplast The    lipid    storing  leucoplasts  are  called.

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