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Auxins also play a part in phototropism, an occurrence that involves plants bending or moving away from light. The shoot tip is responsible for directional movement by the plant in response to sunlight, as this is the area where ... Tutorials » Control of Growth & Development » Plant Auxins - Phototropism & Geotropism...
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www.biology-online.org/3/5_plant_hormones.htm
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Like phototropism, gravitropism appears to be regulated by auxins. One hypothesis proposes that when a seedling is placed horizontally, auxins accumulate along the lower sides of the root and the stem. This concentration of auxins stimulates cell elongation along the lower side of the stem, and the stem grows upward.
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www.biology-online.org/11/10_growth_and_plant_hormones....
www.biology-online.org/11/10_growth_and_plant_hormones.htm
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With the contribution of more scientists, it was gradually concluded that auxins were responsible for phototropism, auxins elongated cells on the shady side ...
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www.essortment.com/all/phototropism_rdwn.htm
www.essortment.com/all/phototropism_rdwn.htm
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Auxins are plant hormones. The most important auxin produced by plants is indole-3-acetic acid (IAA). ... Plant shoots display positive phototropism: when illuminated from one direction, the shoot proceeds to grow in that direction.
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users.rcn.com/jkimball.ma.ultranet/BiologyPages/A/Auxin...
users.rcn.com/jkimball.ma.ultranet/BiologyPages/A/Auxin.html
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AUXIN-GIBBERELLIN INTERACTION ON PHOTOTROPISM. 75 may be seen, all the hypocotyls gave positive reactions under light of. 1500 lux intensity. ...
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pcp.oxfordjournals.org/cgi/reprint/4/1/73.pdf
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Phototropism - Wikipedia, the free encyclopedia
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Phototropism is directional growth in which the direction of growth is determined by the direction of the light source. In other words, it is the growth and response to a light stimulus. Phototropism...
en.wikipedia.org/wiki/Phototropism
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Both root tips and most stem tips exhibit positive phototropism to red light. Phototropism is enabled by auxins. Auxins are plant hormones that have many functions. In this respect, auxins are responsible for expelling H+ ions which decreases pH in the cells on the dark side of the plant.
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www.bioportfolio.com/indepth/Phototropism.html
www.bioportfolio.com/indepth/Phototropism.html
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This behaviour is common among plants and is known as phototropism. ... Methyl-4-chlorindole-3-acetic acid and indole aspartate, for example, were found in unripe pea seeds (and unripe seeds of other plants, too). Auxins are often glycosylated or bound to proteins.
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www.biologie.uni-hamburg.de/b-online/e31/31b.htm
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With the contribution of more scientists, it was gradually concluded that auxins were responsible for phototropism, auxins elongated cells on the shady side of the plant, and this elongation made a curvature in the stem.
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homepage.smc.edu/hodson_kent/plant_growth/Hormones/Phyt...
homepage.smc.edu/hodson_kent/plant_growth/Hormones/Phytochrome/phototropism.htm
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