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And the mechanism that's thought to be behind it is brilliantly simple. Cells in the root and shoot tips contain little packets of starch, called statoliths. The starch is dense so the statoliths always settle at the bottom of the cell. The position of the statoliths determines which direction auxin is released in. Tilting the plant on its side makes the statoliths roll and settle on the side of the cells, causing auxin to be released in that direction, and the cells there to elongate.
Auxin is the first group of plant hormones that was discovered by scientists in 1926. Auxin is mainly present in the form of indole acetic acid (IAA) in plants. However, there are other chemical compounds also found in plants that exhibit functions similar to auxins.One of the major functions of the IAA is to stimulate cell elongation of the young shoots.uxin is the first group of plant hormones that was discovered by scientists in 1926. Auxin is mainly present in the form of indole acetic acid (IAA) in plants. However, there are other chemical compounds also found in plants that exhibit functions similar to auxins.