DENDROLOGY

Detailed explanation-1: -Celery is handy for demonstrating capillary action because it has a lot of xylem tubes in the stalk, making for fast water uptake. You’ll see the pale green leaves take on a reddish and bluish colour because the dissolved food colouring moves with the water through the xylem tubes into the celery stalk and leaves.

Detailed explanation-2: -Besides xylem (water-conducting) and phloem (food-conducting) tissues, which together are called vascular bundles, celery contains collenchyma tissue, which provides support for the plant.

Detailed explanation-3: -When water moves into tiny spaces like that, we call it capillary action. In this activity the color in the water moved up into the celery with the water, because the water molecules attached to the coloring and brought it along. In nature, the water moving into a plant brings with it nutrients from the soil.