Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Fertilisation
Dasari. Sreekanth. M.Sc, NET, TS/AP-SET, (Ph.D).
Department of Botany,
Osmania University,
Hyderabad.
Email ...
Fertilisation
 Fertilisation is the fusion of the male (n)
and female (n) gametes to produce a
zygote (2n)
 The pollen g...
Fertilisation
 Entry of pollen tube is 3 types
 A. Porogamy
 B. Mesogamy
 C. Chalazogamy
Fertilisation
 Porogamy: enters through micropyl
Fertilisation
 Mesogamy: enters through integuments.
Fertilisation
 Chalazogamy: enters through Chalaza.
Pollen Grain
Pollen Tube
Tube Nucleus
Generative Nucleus
Tube nucleus disintegrates
Mitotic division of generative
nucleus to form 2 male gametes
1 Male gamete fuses with the 2 polar nuclei to
form the triploid endosperm nucleus
1 male gamete fuses with the egg nucleu...
3N endosperm nucleus
2N Zygote
Double fertilisation
15
DOUBLE FERTILISATION (Syngamy and triple fusion)
Pollen tube into
synergid
• the pollen tube releases the two male game...
The end-
POST-FERTILISATION : STRUCTURES AND
EVENTS
Fertilization in plants ( Double fertilization, syngamy, triple fusion.
Fertilization in plants ( Double fertilization, syngamy, triple fusion.
Upcoming SlideShare
Loading in …5
×

Fertilization in plants ( Double fertilization, syngamy, triple fusion.

3,056 views

Published on

reproduction in flowering plants.

Published in: Education
  • Be the first to comment

Fertilization in plants ( Double fertilization, syngamy, triple fusion.

  1. 1. Fertilisation Dasari. Sreekanth. M.Sc, NET, TS/AP-SET, (Ph.D). Department of Botany, Osmania University, Hyderabad. Email id: shreekanthdasari@gmail.com
  2. 2. Fertilisation  Fertilisation is the fusion of the male (n) and female (n) gametes to produce a zygote (2n)  The pollen grain produces the male gametes  Embryo sac produces an egg cell and polar nuclei
  3. 3. Fertilisation  Entry of pollen tube is 3 types  A. Porogamy  B. Mesogamy  C. Chalazogamy
  4. 4. Fertilisation  Porogamy: enters through micropyl
  5. 5. Fertilisation  Mesogamy: enters through integuments.
  6. 6. Fertilisation  Chalazogamy: enters through Chalaza.
  7. 7. Pollen Grain
  8. 8. Pollen Tube
  9. 9. Tube Nucleus Generative Nucleus
  10. 10. Tube nucleus disintegrates Mitotic division of generative nucleus to form 2 male gametes
  11. 11. 1 Male gamete fuses with the 2 polar nuclei to form the triploid endosperm nucleus 1 male gamete fuses with the egg nucleus to form the diploid zygote
  12. 12. 3N endosperm nucleus 2N Zygote Double fertilisation
  13. 13. 15 DOUBLE FERTILISATION (Syngamy and triple fusion) Pollen tube into synergid • the pollen tube releases the two male gametes into the cytoplasm of the synergid. Syngamy • the pollen tube releases the two male gametes into the cytoplasm of the synergid. One male game fuse with egg cell and produces zygote. • Diploid Zygote formation - zygote develops into an embryo. Triple fusion 3 haploid nucleus fuse • other male gamete moves towards the two polar nuclei located in the central cell and fuses with them to produce a triploid PEN This central cell forms • primary endosperm cell (PEC) and develops into the endosperm
  14. 14. The end- POST-FERTILISATION : STRUCTURES AND EVENTS

×