Chapter 37 Plant Development

Chapter 37 Plant Development - 37 Plant Development 37.1...

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37 Plant Development 37.1 Plant Development - Enviormental clues - receptors to sense enviormaltal cues - hormones -genome Plant Genome, Hormones, and Photoreceptors - hormones- produced in a specific part of plant body - photoreceptors can absorb light - genome limits plant’s capacity From seed seedling - dominate cells are not actively growing - when it germinates, it takes up water - develops a radical – embryonic root Flowering - flowering is a reproductive organ Seed Germination Cues - exclude water and molecular oxygen from embryo - mechanical resistant of embryo through a seed coat - chemical inhibition of embryonic development Seed Dormancy Advantages - allows seeds to wait until conditions improve - prevents competition between parent/daughter - allow for fresh start after a fire Begins with Uptake of Water - imbibition - high ψ inside seed - metabolic pathways activated Mobilizing Seed Reserves - relays on seed reserves until able to do photosynthesis - stored in endosperm or condyles - startch, oils, and protein -
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