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External morphology of rice

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External morphology of Rice

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External morphology of rice

  1. 1. WELLCOME TO MY PRESENTION
  2. 2. PRESENTED BY___ Name : Md. Sohel Rana ID : 11 20 90 40 Prog : BSAg
  3. 3. TOPIC NAME : External morphology of Rice
  4. 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. 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. 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. 7. CON… The radicle or primary root breaks through the covering. Two or more sparsely branched seminal roots follow
  8. 8. CON… Seedling: Mesocotyl ptushing he coleoptile above the soil surface. The first seedling leaf, or primary leaf
  9. 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. 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. 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. 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. 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. 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. 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. 16. CON… Flower: The floret contains a flower. Fig. 41 - Pistil. Fig. 43 - Anthers and filaments. Fig. 44 - Stigma, style, and ovule.
  17. 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. 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. 19. THANK YOU ALL
  20. 20. QUESTION ?

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