Ch 36 - Reproduction in Flowering Plants

Ch 36 - Reproduction in Flowering Plants - Reproduction in...

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Reproduction in Flowering Plants Chapter 36 Alternation of Generations A diploid sporophyte generation (large and nutritionally independent) A haploid gametophyte generation, located in the flower that is microscopic and nutritionally dependent on the sporophyte generation. Environmental cues facilitate the switch between vegetative and reproductive development Involves activation and inactivation of genes e.g. Flowering locus C gene – transcriptional factor that represses flowering Floral Structure Male and Female Gametophytes (n) Pollination Pollen grains are transported to stigmas by a variety of agents, such as animals and wind Self-pollination: within same flower or different flower on same individual plant Prevented by plants increasing harmful genes or rejecting its own pollen (self-incompatibility) Cross-pollination: transfer to a flower on another individual of same species Co-evolution Reciprocal adaptation flowering plant, animal pollinator form interdependent relationship affecting one another’s evolution Example: flowers with large, showy petals and scent
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This note was uploaded on 02/11/2010 for the course BIO 01-119-10 taught by Professor D'arville during the Spring '09 term at Rutgers.

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Ch 36 - Reproduction in Flowering Plants - Reproduction in...

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