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Seed classification Di cotyledons Mono cotyledons Ex.(corn) Ex.(bean)

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Presentation on theme: "Seed classification Di cotyledons Mono cotyledons Ex.(corn) Ex.(bean)"— Presentation transcript:

1 Seed classification Di cotyledons Mono cotyledons Ex.(corn) Ex.(bean)

2 Seed of dicot plant have two Seed of monocot plant have one cotyledons
Seed classification Seed of dicot plant have two cotyledons. Seed of monocot plant have one cotyledons

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4 There are quite a few differences between a monocot and a dicot plant.

5 Germination Germination is the resumption of growth of the embryo plant inside the seed. Is seed development into plant

6 all seeds contain an embryo
Embryo :1-Radical 2-plumule 3-cotyledons

7 Germination in a Dicot The primary root emerges through the seed coats while the seed is still buried in the soil.

8 •The hypocotyl ("below the cotyledons") emerges from the seed coats and pushes its way up through the soil. It is bent in a hairpin shape — the hypocotyl arch — as it grows up. The two cotyledons protect the plumule — the epicotyl ("above the cotyledons") and first leaves — from mechanical damage

9 Once the hypocotyl arch emerges from the soil, it straightens out
Once the hypocotyl arch emerges from the soil, it straightens out. This response is triggered by light. Both red light, absorbed by phytochrome and blue light, absorbed by cryptochrome.

10 monocot— like corn or oats— germinate
•the primary root pierces the seed coverings and grows down

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13 Type of germination 1-Hypogeal 2-Epigeal

14 Hypogeal germination Hypogeal

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16 Epigeal Epigeal

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