Bacterial Reproduction

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IntroductionBacteria can reproduce in one of two ways:

1. Asexually2.Sexually

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Asexual ReproductionIt is also known as somatic or vegetative reproduction.There are four types of reproduction method:-

1.Binary Fission2.Budding3.Fragmentation4.Spore Formation

BINARY FISSION

In this single cell divides after devolping a transverse septum.Eg. Bacillus Subtilis

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BINARY FISSION

BUDDING:- A process in which small bud develops at one end of the cell, inlarges and inventially develops into a new cell which separate from the spirits.

Eg. Rhodopseudomonas acidophilas.

FRAGMENTATION:- Fragmentation of the filament into small bacillary or coccoid cells, each of which give rise to new cells. Each filaments develop other five filaments.

Eg. Nocardia.

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SPORE FORMATION:-Asexual spores whose function is to disimate the species are produce in large number. There are many kinds.

SPORANGIOSPORES:- These are the single celled spores which are form in a SAC called sporangia at the end of special hayphae is called sporangiospores. These are of two types.

a} Ablanospores- These are normal type sporangia.b} Zoospores- These are mortile type sporangia.

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CONIDIOSPORES:- These are the small single cell spores present at the tip or side of hyphae.

ARTHROSPORES:- These are single cell spores which are formed by disjointing of hyphae cells.

CHLONYDOSPORES:-These are the thick wall single cell spores which are highly resistant to adverse conditions . They are formed from the cells of vegetative hyphae.

BLASTOSPORES:-These are formed by budding on the side oh hyphae.

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Sexual ReproductionThis is carried out by the fusion of compatible nuclei of two parent cells.The various methods of sexual reproduction can be some divides as followed:-

1.GAMETIC COPULLATION- Two gametes of two parent cell fuse together.2.GAMETE GAMETANGIAL COPULLATION- In this two gametangia come into contact but do not fuse.

3.GAMETANGIAL COPULLATION- In this two gametangia fuse together. 4.SOMATIC COPULLATION- There is fusion of somatic or vegetative cell.TYPES OF SEXUAL SPORES1.ASCOSPORES2.BACIDIOSPORES3.ZYGOSPORES4.OOSPORES

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Bacterial Conjugation

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• plasmid copies itself• passes through pili (cytoplasmic bridge) into recipient cell

•cells separate with both cells containing the plasmid

plasmid

donor recipient cell (+) cell ( - )

pili

Arminder Singh DFP/110402Krishan Kumar DFP/110432Gurvinder Singh DFP/132125

THANKS…

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