Different stages in the plant growth cycle show a certain rhythmic pattern, the growth of plants or organs is often limited to certain areas, the observation of the plant growth cycle and growth areas in order to have a perceptual understanding of the rhythmic and localized laws of growth, and then for the study of artificial regulation and control of the growth process in order to prepare for the study of artificial regulation and control of the growth process.

Operation method

A test for determining the growth zones of leaves of dicotyledonous plants

Materials and Instruments

Sunflower Seedling
Rubber Stamp Ruler

Move

Select the top of the sunflower seedling has not yet fully expanded 3-4 pieces of young leaves, with a special rubber stamp on the 2 mm square small grid. The operation should be as careful as possible, not only to make the imprint clear, but also not to bruise the leaves. 3-6 days later, observe the changes in the width of the small cells at the top, middle and base of the leaves, and draw a diagram to show.

Common Problems

Analysis of results

Clarify in detail in which parts of the leaf blade the growth areas of dicotyledonous plants are distributed?

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