A2 OCR Biology - Plant hormones and their effects Plant hormones and their effects 3.0 / 5 based on 2 ratings ? BiologyBiological molecules, organic chemistry and biochemistryA2/A-levelAll boards Created by: IzzyCreated on: 10-04-12 10:58 Auxin Promote cell elongation. Inhibit growth of side shoots. Inhibit abscission (leaf fall). 1 of 5 Abscisic Acid Inhibits seed germination and growth. Causes stomatal closure when the plant is stressed by low water availability. 2 of 5 Cytokinins Promote cell division. 3 of 5 Giberellins Promote seed germination and growth of stems. 4 of 5 Ethene Promotes fruit ripening 5 of 5
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