Botany notes - Botany II notes angiosperms double...

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Botany II notes angiosperms: double fertilization (only one) -endosperm: food reserve of seed for embryo and baby plant Germination: Steps -seed absorbs water/seed rupture (imbibition) -gibberellin is released (hormone involved) -triggers production of amylase (breaks down starch) -starch hydrolyzed into maltose (breaking it down) -maltose hydrolyzed into glucose -glucose into energy-new cell walls -SHORT ANSWER ON TEST photoperiodism: control flowering of plants -Pr into Pfr -Phytochrome -know long day (short night=critical period) and short day plant -Pfr triggers response to flower -abundance=bloom Phototropism: response to light -auxin move to dark side -causes cells to elongate (HAVE TO HAVE FOR CREDIT) -plant bends towards light Thygmotropism: response to touch -auxin moves to side away from object
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Unformatted text preview: -causes cells to elongate -wraps around object Gravitropism: response to gravity -statoliths settle in cell to bottom (NOT auxin) (how it determines up from down) -auxin moves to top shoot cells elongate/grows up -auxin moves to bottom -root cells elongate/roots grow down Hormones: -auxin: cell elongation -cytokinins-cell division -giberellins-cell growth/break dormancy (germination) -abscisic acid-slows growing seed dormancy, closes stoma -apopostasis-where leaves drop when plants die -ethylene-fruit ripening (only hormone that is a gas) Seed: has embryo, endosperm (triploid), seed coat to protect it -seed coat-protection and keep it from drying out (desiccation) -Pr to Pfr is much quicker due to red light (turns it on) -red light turns it on by turning phytochrome to Pfr and flowering...
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