Lecture 15 - Seed development

Lecture 15 - Seed development - SEXUAL PROPAGATION:...

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SEXUAL  PROPAGATION: SEED BIOLOGY AND  APPLICATIONS
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Topics to be covered Seed development Seed ripening and dissemination Seed germination Seed dormancy Seed saving, certification and storage Plant breeding and selection
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Seed  development
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Introduction 400 million years ago plants moved out of the  oceans to colonize land    Two major adaptions made this possible:        1) __________        2) _________________ Price - relative immobility Solution:  spores               seeds Facilitated spread of progeny _________ ____________________
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Bryophytes Green  Algae Ancestor Pteridophytes Gymnosperms Angiosperms Vascular          Seeds Terrestrial   Flowers EVOLUTIONARY TIME Kingdom Plantae
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Seed Development
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  Features: stigma collects     pollen ____________________ Sperm cells fuse with: 1.  egg cell - ___________ 1.2 polar nuclei –        ____________________ Pollination & fertilization
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This note was uploaded on 04/03/2011 for the course HORT 201 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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Lecture 15 - Seed development - SEXUAL PROPAGATION:...

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