WELLCOME TO MY PRESENTION

PRESENTED BY___

Name : Md. Sohel RanaID : 11 20 90 40Prog : BSAg

TOPIC NAME :

External morphology of Rice

What is Morphology ??

The branch of biology that studies the structure andform of animals and plants.

The study of the form and structure of plants andanimals.

CON….

Related Words :

Biological science, biology - the science thatstudies living organisms

Anatomy, general anatomy - the branch ofmorphology that deals with the structure ofanimals

Morphology of RICE

Germinating Seed: When the seed

germinates in well-drained and well-aerated soil, thecoleorhiza, a covering enclosing the radicle or primaryroot, protrudes first.

Fig. 1 - The coleorhiza protrudes first.

CON…

The radicle or primary root breaks through the covering.

Two or more sparsely branched seminal roots follow

CON…Seedling: Mesocotyl ptushing he coleoptile above

the soil surface.

The first seedling leaf, or primary leaf

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.

CON…Secondary adventitious roots are produced from the

underground nodes of young tillers.

Fig. 9 - Secondary adventitious roots.

Fig. 10 - Adventitious prop roots.

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.

CON…Early tillers arise from the main culm in an alternate

pattern.

Fig. 14 - Primary tillers.

Fig. 15 - Secondary tillers.

Fig. 16 - Tertiary tillers.

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.

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.

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

CON…Flower: The floret contains a flower.

Fig. 41 - Pistil.

Fig. 43 - Anthers and filaments.

Fig. 44 - Stigma, style, and ovule.

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 pericarptegmen and aleurone layers.

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.

THANK YOU ALL

QUESTION

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