The lecture about plant parts and reproduction


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It tackles about the functions of each part of a flower.

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The lecture about plant parts and reproduction

  1. 1. The Lecture aboutThe Plant Parts and Reproduction<br />Prepared by: Miss Mannielet Angelica L. Rosales<br />Pre-Masteral Student/Student Teacher<br />
  2. 2. The Flower<br />The flowers are the reproductive parts of most plants. It contains pollen and tiny eggs called ovules. After pollination and fertilization of the ovule, the ovule develops into a fruit.<br />
  3. 3. The Parts and Functions of a Flower<br />
  4. 4. The Parts and Functions of a Flower<br />1. Peduncle- The flower stalk<br />2. Receptacle- The part of the flower that bears floral organs at the base of the flower.<br />3. Sepal- The leaf like structures at the base of a flower that protects the young flower bud<br />4. Calyx- The sepals together form the calyx<br />5. Petal- It is located above the sepal which is often large and colorful. It provides scent and produces nectar that serves to attract pollinators to the plant.<br />
  5. 5. 6. Corolla- The petals together form the calyx<br />7. Stamen- The male organ of the flower which are consist of the anther and filament that produces pollen grains.<br />8. Filament- The stalk of the stamen which bears the anther.<br />9. Anther- The pollen bearing portion of the stamen.<br />10. Pollen- The grains that contain male gametes.<br />
  6. 6. 11. Carpel/Pistil- The female organ of the flower that consists of stigma, style and ovary.<br />12. Stigma- The sticky top of carpel that serves as a receptive surface for pollen grains.<br />13. Style-The stalk of a carpel between stigma and ovary through which the pollen tube grows.<br />
  7. 7. 14. Ovary- The enlarge base of the carpel that contains ovule or ovules when the ovary matures it become a fruit.<br />15. Ovule- It is located in the ovaries that carries female gametes. The ovule become seeds through the process of fertilization.<br />
  8. 8. The sex of the flower can be determined in three ways<br />Staminate Flower- The flowers that bears only male sex parts. These are sometimes referred as the “male flowers.<br />Carpellate Flower- The flowers that bears only female sex parts. These are sometimes referred as the “female flowers”.<br />Hermaphrodite/Complete Flower- The flowers that bear both male and female parts.<br />
  9. 9. What is Pollination ?<br />Pollination – The transfer of pollen from the anthers of a flower to the stigma of the same flower or another flower pollination for fertilization which means the fusion of nuclei from the pollen grain with the nuclei of the ovule.<br />
  10. 10. What is a Pollinator ?<br />Pollinator- An animal that moves pollen from the anthers to the stigma thus effecting pollination .<br />The animals that are known to be good pollinators which include the following:<br />Bees<br />Butterflies<br />Humming Birds<br />Moth<br />Wasp<br />Nectar-feeding Bats<br />
  11. 11. What are the benefits?<br />Plants benefit from pollination because the movement of pollen allows them to reproduce by setting seeds.<br />They pollinate to get nectar and or pollen from flowers to meet their energy requirements to produce offspring.<br />In the economy of nature, the pollinators provide an important service to flowering parts while the plants pay with food for the pollinators and their offspring.<br />
  12. 12. The two types of Pollination <br />Cross Pollination also called Allogamy- It occurs when the pollen is delivered to a flower of different plant. Plants adapted to cross-pollinate often have taller stamens than carpels or use other mechanism to better ensure the spread of pollen to other plants’ flowers.<br />Self Pollination- It occurs when pollen from one flower pollinates the same flower or other flowers of the same individual.<br />