cytology ultrastructuralstudies in embryo nuclear cytology studies in embryology

1. Ultra structure and Nuclear
cytology
Presented by.
Neha shrimali
M.sc botany
Sem-2
CBO-404
Life science department
h.n.g.u. patan

2. Contents
 Cytology.
 Ultrastructural studies In Embryo.
 Nuclear cytology studies in Embryology.

3.  Cytology :~ Is the science that study the
structure and functios of the cell.
 Embryology :~ Is the science that research
embryonic development of human body.

4. Ultra structural studies in embryo
 In the embryogenesis of many angiosperms it
is very typical for the early embryo to different
into two parts suspensior and the embryo
proper.
 The suspensor is a specialized structure and
continued development of the embryo proper
with in the seed.

5.  The diversity of suspensory morphology
among angiosperms.
 A reduced structure consisting of a single cell
to a massive structure composed of hundred of
cells.

6.  Morphologically a simple filamentous multi-
cellular suspensior is the type discribed in
Arebidopsis and members of the brassicaceae.
 Spheroid masses of large cells and are much
larger then the young embryo proper.
 Some suspensors develop haustoria that
penetrate the endosperms and integuments.

8. NUCLEAR CYTOLOGY STUDIES IN
EMBRYO
 The crassulaceae family mainly compromises her
bacus leaf succulents some of which are used as
ornaments.
 SEDUM REFLEXUM L.was investigated using
cytochemical methods light end electron
microscopy

9.  The suspensor consists of a large basal cell and
a single row of 6 to 10 chalazal cells.
 The basal cell produces a branched haustorium
which invades ovular tissue.
 The basal cell from the wall ingrowths that are
typical for transfer cells.

10.  The dense cytoplasm filing the basal
cell is rich in profiles of endoplasmic
,reticulum ,active dictyosome,
mitocondria plastids
,microtubules,bundles of
microfilaments,microbicides and lipid
droplets.

11.  The present work reveals that the
suspensors structure in S.REFLEXUM
markedly differs from that found in
other representatives of crassulaceae .

12. Refrences
www.intechopen.com

13. THANK YOU