Chapter 38 Reproduction in plants

Chapter 38 Reproduction in plants - Chapter 38-...

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Chapter 38- Reproduction in plants 38.1 Sexual Angiosperms -sexual reproduction new phenotype Flower is an Angiosperm structure for sexual reproduction - carpels, stamens, petals, and sepals are all parts of flower - carples- female part - stamen- male part - pistil- one or more carples - ovary- contains one or more ovules in which a megasporangium; inside, female gamete develops - stalk of a pistil is a style - stamen made of filament with 2 lobed anther- 4 crosporangia fused together - all petals = corolla - below sepals make calyx - male gametophytes begin within microsporangia Microscopic Gametophytes - multicellular diploid generation alternates with multicellular haploid generation - sporophyte generation produces the flower - flower produces spores - female gametophytes embryo sacs develop into megasporangia - male gametophytes pollen grains develop into microsporangia - megasporocyte undergoes a meiotic division, all but one survives; then undergoes 3 mitotic divisions; then migrates to 3 cells at one end (antipodal cells), 3 at another (2 synergids + 1 egg) and 1 central large cell (2 nucli) called
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This note was uploaded on 09/15/2009 for the course BIOE 20B taught by Professor Williams during the Spring '09 term at UCSC.

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Chapter 38 Reproduction in plants - Chapter 38-...

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