Plant Kingdom

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RËPRØDÜÇTÏØÑ

Vegetative

reproduction:

By

fragmentation or by formation of

different types of spores. (AIPMT 2012)

Asexual reproduction: By flagellate

zoospores produced in zoosporangia.

Sexual

reproduction:

By

sex

cell

formation and may be isogamous,

anisogamous or oogamous.

PHÅËØPHÝÇËÅË (BRØWÑ ÅLGÅË)

1

2

Food is stored as complex carbohydrates, which may be in

the form of laminarin or mannitol. (AIPMT 1997)

They vary in colour from olive green to brown depending upon

the amount of xanthophyll pigment, fucoxanthin. (AIPMT 1997)

3

The vegetative cells have a cellulosic wall usually covered on

the outside by a gelatinous coating of algin. (AIPMT 1997)

4

Protoplast contains plastids, central vacuole and nucleus.

5

6

E.g. Ectocarpus, Dictyota, Laminaria, Sargassum, Fucus and

Kelps.

Plant body is attached to substratum by a holdfast, has a stalk

(stipe) and leaf like photosynthetic organ (frond).