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Plant Tropisms

Chapter 39. Plant Tropisms. Figure 39.5. RESULTS. Shaded side. Control. Light. Illuminated side. Boysen-Jensen. Light. Darwin and Darwin. Light. Gelatin (permeable). Mica (impermeable). Trans- parent cap. Opaque cap. Opaque shield over curvature. Tip removed. RESULTS.

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Plant Tropisms

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  1. Chapter 39 Plant Tropisms

  2. Figure 39.5 RESULTS Shaded side Control Light Illuminatedside Boysen-Jensen Light Darwin and Darwin Light Gelatin(permeable) Mica(impermeable) Trans-parentcap Opaquecap Opaqueshield overcurvature Tipremoved

  3. RESULTS Figure 39.6 Excised tip onagar cube Growth-promotingchemical diffusesinto agar cube Control(agar cubelackingchemical) Offsetcubes Control

  4. Primary root of maizebending gravitropically(LMs) (b) (a) Statoliths settling tothe lowest sides ofroot cap cells (LMs) Figure 39.24 Statoliths 20 m

  5. Figure 39.25

  6. Figure 39.26 (b) Stimulated state (a) Unstimulated state Side of pulvinuswith flaccid cells Leafletsafterstimulation Side of pulvinuswith turgid cells Vein Pulvinus(motororgan) 0.5 m (c) Cross section of a leaflet pair in the stimulated state (LM)

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