Untitled

      Sunlight
         |
         |
         v
     +-------+
     | Leaf  | <---+
     +---+---+     |
         |         |
         |         |
     +---v---+     |
     | Auxin |     |
     +---+---+     |
         |         |
         v         |
     +-------+     |
     | Shade |     |
     +-------+     |
         |         |
         |         |
     +---v---+     |
     |  Cell |     |
     |  Wall |     |
     +---+---+     |
         |         |
         v         |
     +---+---+     |
     | Proton|     |
     | Pump  |     |
     +---+---+     |
         |         |
         v         |
     +-------+     |
     | Vacuole|     |
     +-------+     |
         |         |
         v         |
     +-------+     |
     |       |     |
     |  Water|     |
     |       |     |
     +-------+     |
         |         |
         v         |
     +-------+     |
     |       |     |
     |  Elong|     |
     |  ated |     |
     |  Side |     |
     +-------+     |