38-pldevresponmod

38-pldevresponmod - Plant Developmental Responses...

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Unformatted text preview: Plant Developmental Responses Phototropism positive Gravitropism positive negative Thigmotropism Old Fig. 36.11 Sun rising over horizon Morning Noon Afternoon Heliotropism Old Fig. 36.08c (c) Cross-sectional views Parenchyma cells retaining turgor Decrease of turgor in parenchyma cells Vascular tissue Pulvinus Leaflet Open Closed Nastic movements Mimosa Venus fly trap (vulnerable) (induction) Fig 6-2 Cell communication Signal transduction pathway eg: hormones Auxin structure The Darwins’ work on phototropism coleoptile of grass seedling + +-- Frits Went’s experiment What’s happening? effects a. promotes cell growth b. shoot phototropism c. root gravitropism d. apical dominance e. differentiation of vascular tissue f. prevents leaf abscision effects a. promotes cell growth b. shoot phototropism c. root gravitropism d. apical dominance e. differentiation of vascular tissue f. prevents leaf abscision Apical dominance (released) effects a. promotes cell growth b. shoot phototropism c. root gravitropism d. apical dominance e. differentiation of vascular tissue f. prevents leaf abscision used in agriculture/horticulture to:...
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This note was uploaded on 01/17/2012 for the course BIOL V04 taught by Professor De-jesus,m during the Fall '08 term at Ventura College.

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38-pldevresponmod - Plant Developmental Responses...

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