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Understanding Plant Growth and Reproduction: From Roots to Fruits

Explore the fascinating process of plant growth and reproduction. Plants continue to grow throughout their lives, with primary growth producing new tissues and secondary growth enlarging existing ones, especially in dicots. Asexual reproduction occurs through mechanisms like rhizomes, bulbs, and runners, while sexual reproduction involves flowers with male (stamens) and female (carpels) reproductive parts. Discover how fruits, derived from mature ovaries in angiosperms, protect seeds and aid in their dispersal.

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Understanding Plant Growth and Reproduction: From Roots to Fruits

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  1. Plants Part 2 Growth and Reproduction

  2. Plant growth • Many plants have continuous growth • Growth occurs in discrete places • Primary growth is the making of new tissues • Secondary growth is the enlarging of older tissues

  3. Only dicots have secondary growthWood is a type of secondary growth and occurs along the vascular cambium

  4. Rings are made when wood produced in the spring meets wood produced in the winter

  5. Reproduction • Asexual • Rhizomes (iris) • Bulbs or corms (daffodils) • Runners or stolons (Bermuda grass, strawberries) • Sexual • Spores (mosses, liverworts and ferns) • Seeds (gymnosperms, and angiosperms)

  6. 1) Stamen male reproductive parts • Anther contains pollen • Filament stem-like portion of the stamen that holds the anther erect 2) Carpel female reproductive parts of the flower • Stigma sticky end part of the carpel fo pollen attachment • Style the stalk that raises the stigma out of the flower • Ovary area in which the ovules are kept ovary wall will develop into fruit

  7. 3) Ovule structure that will develop into seed after fertilization 4) Calyx outer most portion of the flower, usually showy • Petals usually the colorful portion of the flower collectively the petals are called the corrolla • Sepals outermost part of the flower covers the developing bud often green, but sometimes colored like the petals as in lillies

  8. What is a fruit? • A mature ovary • Found only in angiosperms • Protects the seeds by enlarging the ovary wall • Aids in dispersal of seeds

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