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Plants17 - secondary tissue growth and fruit development...

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Plants: Essential Processes Terms Abscisic Acid - The best known of the inhibitor hormones; inhibits growth and prolongs dormancy. Acid Growth Hypothesis - Explains phototropism by suggesting that increased acidity in the walls of certain cells (stimulated by the hormone auxin) increases their flexibility and expandability, so that more water can diffuse into the cells and cause cell elongation. Active Transport - Movement of substances across cell membranes that requires energy expenditure on the part of the cell; contrasts with passive diffusion, or osmosis. Apoplast - The pathway from the root surface to the core by which water moves along cell walls and through intercellular spaces, bypassing the cells themselves. Auxin - One in a class of plant hormones that stimulates (among other things) cell elongation,
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Unformatted text preview: secondary tissue growth, and fruit development. Cytokinin - One in a class of plant hormones that promotes cell division and tissue growth. Day-Neutral Plant - Plant in which blooming is not affected by photoperiod, so that flowering occurs independently of the duration of day and night. Ethylene - A plant hormone that controls fruit ripening and promotes senescence (aging). Florigen - Name given to the hypothetical hormone that might control flowering in plants. Gibberellin - One of a class of plant hormones that stimulates stem elongation, germination, and conversion of the embryonic food source into usable sugars. Gravitotropism - Reaction of a plant to gravity; a stem grows against gravity, roots toward gravity....
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