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Plant organs


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Plant organs

  1. 1. Plant Organs
  2. 2. Roots  They anchor the shoot into the soil and support the upright growth of stems  They absorb minerals and water from the soil  They provide storage of energy reserves
  3. 3. Root Anatomy
  4. 4. Root Morphology
  5. 5. Rhizobia  It is a indigenous soil bacteria
  6. 6. Mycorrhizae
  7. 7. Stem  Primary supporting structure for the leaves, flowers, and fruits of a plant  The conduit for the movement of water, nutrients, and products of photosynthesis between the crown of the plant and the roots  Grasses have tillers,or shoots which arise from the crown and consist of stem and leaf parts and sometimes reproductive parts.
  8. 8.  Rhizomes-underground stems that are important for asexual reproduction of plants  Stolons-this stems are called runners  Tubers- significant for the storage of carbohydrates  Bulbs- narrow stem surrounded by layers of concentric ,fleshy rings  Corms- compressed,solid, fleshy portions of an underground stem
  9. 9. Crown-formers or Clone-formers
  10. 10. Leaves  Primary organs where the essential processes of photosynthesis and transpiration occur.
  11. 11.  Venetion- that are vascular system of the plant for the movement of water and nutrients  Blade-is the flat surface of a leaf that is exposed for maximum interception of sunlight  Sheath-is the lower portion of the leaf that surrounds the stem  Collar-located at the union of the blade and sheath  Petiole- attaches the blade to the stem
  12. 12. Flowers  Modified leaves that may retain some leaf-like characteristics.  4 PARTS OF A FLOWER Stamens-male component of flower Petals- modified leaves that is important for attracting pollinators Sepals- green leaf-like structures Pistil-the female portion of the flower Stigma, style and ovary
  13. 13. Classes of Flowers  Complete flowers- composed of stamens ,pistils, petals and sepals  Incomplete flowers-lack 1 or more of the four parts  Perfect flowers-have both stamens and pistils  Imperfect flowers- lack either the stamen or pistil Monoecious and dioecious
  14. 14. Inflorescence  Flowers clustered together on branches or system of flowers.
  15. 15. Fruits  A ripened or mature ovary containing seed  Maybe classified as fleshy or dried  Fleshy fruits have a soft consistency and may be consumed by humans  Dried fruits are those that have hard seeds contained within a wall
  16. 16. Seeds  Mature fertilized ovules in the ovary  Each seed contains embryo  Seeds also have food storage reseves  Protected by a seed coat
  17. 17. Seed Germination  The term germination is applied to the resumption of the growth of the seed embryo after the period of dormancy. Germination does not take place unless the seed has been transported to a favorable environment by one of the agencies of seed dispersal.