Unformatted text preview: Auxin is a major contributor of plant form by influencing phyllotaxis, organogenesis, and apical dominance Phyllotaxis Alternate, decussate (opposite), spiral, whorled Organogenesis Auxin has polar movement, auxin maximum on a certain spot where next leaf primordia forms Axillary buds/meristems come from SAM Undifferentiated cells left behind De-differentiation is associated with auxin In a root, promotes becoming meristems Adventitious growth Can get shoots or roots from any cell *CQ: which hormone commonly counteracts Auxin? Cytokinin Cytokinin also contributes to plant form by counteracting auxin and redistributing nutrients from roots to shoots Cytokinin responses Promote nutrient redistribution and communicate nutrient status Promotes shoot growth...
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- Spring '14
- Plant morphology, root apical meristem