Gravitrophism In Plants

The video explains how plants respond to gravity through gravitropism, with roots exhibiting positive gravitropism by growing downward and stems showing negative gravitropism by growing upward. The hormone auxin plays a crucial role in these processes, with its distribution and concentration affecting cell elongation differently in roots and stems. Statocytes in root caps help sense gravity, causing auxin to accumulate and inhibit root cell elongation, while in stems, auxin promotes cell elongation, enabling upward growth.

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