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Iaa Gravitotropism,Shoots Concentration Increases Lower Side Cells Elongate

In shoots, higher IAA concentration on the lower side promotes cell elongation, resulting in upward growth against gravity (gravitropism).

In shoots, higher IAA on the lower side promotes cell elongation, causing upward growth against gravity during gravitropism.

Front Gravitotropism,Shoots and IAA
Back IAA concentration increases on the lower side, cells elongate so shoots grow upwards

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