External morphology of rice

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 ?? T he 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 A natomy , 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… T he 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 ?