Discovering Plants - PowerPoint PPT Presentation

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Discovering Plants

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  1. Discovering Plants

  2. Parts of plant Parts of plant An aerial and upright part of the plant that usually bears the leaves, flowers, and fruits A reproductive organ of the seed bearing plants . Are usually subterranean organ of a plant used for the anchorage to the soil. leaves a flat broad structure responsible for the production of food, transpiration, and respiration.

  3. LEAVES – are flat broad structure responsible for the production of food, transpiration, and respiration. Blade- or lamina, is the broad, flat part of the leaf. Photosynthesis occurs in the blade, which has many green food-making cells. Petiole- the stemlike part of the leaf that joins the blade to the stem Stipules- two small flaps that grow at the base of the petiole of some plants

  4. Small Netted Vein- are so small that they have only one or two veins running through the center of the blade. Veins- carry food and water in a leaf. They also support the blade, much as the metal ribs support the fabric of an open umbrella. Midbrib- Pinnately veined leaves have one large central vein, which extends from the base of the blade to its tip.

  5. Roots- are usually subterranean organ of a plant used for the anchorage to the soil. A primary rootdevelops from a plant's seed and quickly produces branches called secondary roots. Root cap- The tip of each root. Protects the delicate tip as it pushes through the soil. Root hairs-Threadlike, grow farther back on the root. These hairs greatly increase the plant's ability to absorb water and minerals from the soil.

  6. Stems- are aerial and upright part of the plant that usually bears the leaves, flowers, and fruits. Node: The place on the stem where a leaf, branch, or root is attached (or has been attached).  Sheath: A tubular part surrounding another part, often papery. in pondweeds, the portion of the leaf that surrounds the stem.  

  7. FLOWERS- are reproductive organ of the seed bearing plants . OvaryThe part of the plant that contains the ovules. OvuleThe part of the ovary that becomes the seeds. PetalThe colorful, often bright part of the flower (corolla). SepalThe parts that look like little green leaves that cover the outside of a flower bud (calix).

  8. SEED- is a small embryonicplant enclosed in a covering called the seed coat, usually with some stored food • Epicotyl = the shoot (stems and leaves) of the embryonic plant • Radicle = embryonic root • Hypocotyl = connection between cotyledon and radicle • Cotyledon = seed leaf • Seed coat = protective covering

  9. How Plants Grow and Multiply

  10. Plants contribution into our environment and to us.

  11. How Plants Grow and Multiply

  12. Sexual Reproduction Most plants grow from seeds

  13. These plants have parts that making of seeds. These seed-making of plants are found in the flower.

  14. Sexual Reproduction The pistil and the stamenare parts of the flower that are responsible in the making of seeds in flowering plants

  15. Stamen Is the male reproductive organ. It consist of stalk called the filament and an ovoid structure at its tip called the anther. The anther bear the pollen grains.

  16. Pistil The pistil is the female reproductive organ found at the center of the flower. It consist of the ovary ,style, and the stigma. An egg cell is formed in the ovule. The ovules, after fertilization, will develops into seed and the ovary surrounding it becomes the fruit of most plants.

  17. One of the important function of the flower is to produce seeds. How? Pollination

  18. If seeds are to be produced, the pollen grains from the anther must land on the stigma. This transfer of pollen grains to the stigma is called Pollination

  19. Pollination Pollination occur mainly by wind and by animals such as insects and birds. Pollination

  20. Pollination Self pollination When pollen from a plant’s anther is transferred to that same plant’s stigma, it is called self pollination.

  21. Pollination Crosspollination When pollen from a plant’s anther is transferred to another plant’s stigma it is called cross pollination.

  22. Fertilization and Development of Seed

  23. What is fertilization? How does fertilization in flowers lead to the formation of seeds?