Reproduction in AngiospermsReproduction in Angiosperms

Development of Male Gametophyte, Development of Male Gametophyte,

Sub Topics:Sub Topics:

Class : XIIClass : XII

Development of Female Gametophyte andDevelopment of Female Gametophyte and

Double fertilization.Double fertilization.

Power Point PresentationPower Point Presentation

Topic :Topic :

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Development of Male gametophyte

Pollen mother cell(2n)

Meiosis I Meiosis II

(n)

(n)

Pollen Tetrad

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Development of Male gametophyte

Pollen mother cell(2n)

Meiosis I Meiosis II

(n)

(n)

Pollen Tetrad

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Development of Male gametophyte

Pollen grain

Exine

Germ pore

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Development of Male gametophyte

Pollen grain

Exine

Germ pore

Generative cell

Tube cell

Pollen tube

YoungMature

Intine

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Development of Male gametophyte

Pollen grain

Exine

Germ pore

Pollen tube

Mature

Male gametes

A germinating pollen grain with two male gametes is called the Male gametophyte

Tube nucleus

Intine

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Development of female gametophyte in angiosperms

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Ovule

Micropyle

Integuments

Funicle

Nucellus

Chalaza

Megaspores(n)

Megaspore mother cell(2n)

Ovule

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Megaspores(n)

Functional megaspore

3 megaspores degenerate

Ovule

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Functional megaspore

Ovule

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Ovule

Functional megasporeFemale gametophyte

OREmbryo sac

Ovule

Female gametophyte

OREmbryo sac

Antipodals

Egg

Synergids

Secondary nucleus

Egg apparatus

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Double Fertilization and Triple Fusion in

Angiosperms

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Double Fertilization and Triple Fusion in

Angiosperms

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Double Fertilization and Triple Fusion in

Angiosperms

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Pollination

Stigma

Style

Double fertilization in Angiosperms

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Stigma

Style

Pollen grain germinates on the stigma

Double fertilization in Angiosperms

Pollentube

StigmaGenerative cell

Tube nucleus

Style

Pollen grain germinates on the stigma

Double fertilization in Angiosperms

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Male gametophyte

Malegametes

Tube nucleus

Stigma

Style

Pollentube

Pollen grain germinates on the stigma

Double fertilization in Angiosperms

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Malegametes

Tube nucleus

Stigma

Style

Pollentube

Male gametophyte

Siphonogamy & Porogamy

Style

Ovary

Embryo sac

Double fertilization in Angiosperms

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Malegametes

Tube nucleus

Stigma

Style

Pollentube

Male gametophyte

Siphonogamy & Porogamy

Style

Ovary

Embryo sac

Double fertilization and

Triple fusion

Double fertilization in Angiosperms

R. V. MORE Kshirsagar DR. R. V. KSHIRSAGAR PROF.RAMKRISHNA MORE COLLEGE AKURDI PUNE 44

Malegametes

Tube nucleus

Stigma

Style

Pollentube

Male gametophyte

Siphonogamy & Porogamy

Style

Ovary

Embryo sac

Double fertilization and

Triple fusion

Double fertilization in Angiosperms

Malegametes

Tube nucleus

Stigma

Style

Pollentube

Male gametophyte

Siphonogamy & Porogamy

Style

Ovary

Embryo sac

Double fertilization and

Triple fusion

Double fertilization in Angiosperms