REPRPODUCTION IN PLANTS

GROUP NO. 17

Name Id no.

Arpana Pandey

11BSFST081Reshimenla

11BSFST083

REPRODUCTIONProcess by which every living organism produces offspring like

itself.Two types of reproduction:- 1) Asexual reproduction or vegetative reproduction:- A) Natural B) Artificial 2) Sexual reproduction

Asexual reproductionNATURAL VEGETATIVE PROPOGATION

Runners

Tuber

3) Bulbs:- 4) Rhizome:-

ARTIFICIAL VEGETATIVE PROPAGATION1) Cutting:- 2) Grafting:-

3) LAYERING:-

Development of root on stems while it is attached to parent plant.

Two types:-a) Air layeringb) Ground layering

SEXUAL REPRODUCTIONStructure of Flower:-

Pollination

AGENTS OF POLLINATIONAnemophily

Hydrophily

Melittophily

Psychophily

Phalaenophily

Ornithophily

Chiropterophily

Cantharophily

KINDS OF THE POLLINATION

AUTOGAMY:-

GEITONOGAMY :- Transfer of pollen grains

from the anther to the stigma of another flower of the same plant.

XENOGAMY :-

DOUBLE FERTILIZATION

ADVANTAGES OF SELF- POLLINATION:

CHANCES OF MORE POLLINATION. MAINTAINS PURITY .NO NEED TO PRODUCE LARGE NUMBER OF

POLLEN GRAINS.

DISADVANTAGES OF SELF-POLLINATION:

PROGENY BECOMES WEAKER AFTER EVERY GENERATION.

LESS CHANCES OF PRODUCTION OF VARIETIES .

ADVANTAGES OF CROSSPOLLINATION

Production of new varieties.Results in healthy offsprings Production of disease resistant Plants . Results in production of seedsIn self sterile plants.

DISADVANTAGES OF CROSSPOLLINATION

Not economical.It is uncertain because chanceFactor is involvedInvolves addition of undesirable or loss of important

character

REFRENCES

A TEXT BOOK OF NCERTA TEXT OF SILVICULTURE :- L. S. KHANAA TEXT OF SILVICULTURE :- A .P .DIVEDIINDIAN FORESTRY :- K .MANIKNANDANA TEXT BOOK OF ABCECOLOGY AND ENVIRONMENT :- P . D .SHARMAINTERNET.

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