External morphology of Rice

1. WELLCOME TO MY
PRESENTION

2. PRESENTED BY___
Name : Md. Sohel Rana
ID : 11 20 90 40
Prog : BSAg

3. TOPIC NAME :
External morphology of Rice

4. What is Morphology ??
The branch of biology that studies the structure and
form of animals and plants.
The study of the form and structure of plants and
animals.

5. CON….
Related Words :
Biological science, biology - the science that
studies living organisms
Anatomy, general anatomy - the branch of
morphology that deals with the structure of
animals

6. Morphology of RICE
Germinating Seed: When the seed
germinates in well-drained and well-aerated soil, the
coleorhiza, a covering enclosing the radicle or primary
root, protrudes first.
Fig. 1 - The coleorhiza protrudes first.

7. CON…
The radicle or primary root breaks through the
covering.
Two or more sparsely branched seminal roots follow

8. CON…
Seedling: Mesocotyl ptushing he coleoptile above
the soil surface.
The first seedling leaf, or primary leaf

9. CON:
Tiller : The seedling will grow and develop
branched tillers.
Fig. 7 - Parts of the rice tiller.
There are two kinds of mature roots:
1. secondary adventitious roots
2.adventitious prop roots.

10. CON…
Secondary adventitious roots are produced from the
underground nodes of young tillers.
Fig. 9 - Secondary adventitious roots.
 Fig. 10 - Adventitious prop roots.

11. CON…
Culm: The culm, or jointed stem of the rice, is made
up of a series of nodes and internodes.
Fig. 11 - Culm, nodes, and internodes.
The node is the solid portion of the culm.
Fig. 13 - Leaf, node, and bud.

12. CON…
Early tillers arise from the main culm in an alternate
pattern.
Fig. 14 - Primary tillers.
Fig. 15 - Secondary tillers.
Fig. 16 - Tertiary tillers.

13. CON…
Leaf: The node or nodal region of the culm
will bear a leaf.
Fig. 17 - Leaf.
The leaf sheath and leaf blade are continuous.
Fig. 20 - Leaf sheath and blade.

14. CON…
Panicle and Spikletes: The terminal component
of the rice tiller is an inflorescence call the panicle.
Fig. 29 - Rice panicle.
The panicles bear spikelets, most of which develop into
grains.
Fig. 34 - Spikelets.

15. CON…
Floret: The floret includes the lemma, palea,
and the flower.
Fig. 37 – Floret
The larger protective glume covering the floret is called the
lemma and the smaller one is referred to as the palea.
Fig. 38 - Palea and lemma

16. CON…
Flower: The floret contains a flower.
Fig. 41 - Pistil.
Fig. 43 - Anthers and filaments.
Fig. 44 - Stigma, style, and ovule.

17. CON…
Rice grain: The rice grain is the ripened ovary, with
the lemma, palea, firmly attached to it.
Fig. 46 - Rice grain.
The dehulled rice grain is called caryopsis, the pericarp
tegmen and aleurone layers.

18. CON…
The remaining part of the grain consists of the
endosperm and the embryo.
Fig. 49 - Endosperm and embryo.
The embryo contains the plumule (embryonic leaves) and the
radicle (embryonic primary root).
Fig. 50 - Plumule and radicle.

19. THANK YOU
ALL

20. QUESTION
?