Flower Formation - Flower Formation phase change internal...

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Flower Formation plant metamorphosis  - environment controls how the plant changes phase change - internal development >> competence, ability to reproduce reproductive structures added on to existing structures distinct juvenile, adult phases easier to revert adult into juvenile than to induce phase change flower production pathways  - 3 regulated pathways to flowering light-dependent (photoperiodic) pathway - length of day (amount of daily sunlight) affects flowering o daylight shorter than critical length (12 hours) >> flowering in short-day plants (blooms in late summer/fall) o daylight longer than critical length >> flowering in long-day plants (crop plants, blooms in spring/summer) o day-neutral plants - flower when mature, regardless of day length o 2 critical photoperiods >> will not flower if day too long/short o facultative-long-or-short-day-plants - flower speed depends on day length o cryptochrome/phytochrome detect photoperiods o
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