Cholodny-went hypothesis
The Cholodny–Went model for the phototropic movement of shoots was later extended to gravitropism of roots, where auxin was thought to inhibit rather than stimulate growth and to accumulate in the lower side of a root section, causing the root to bend downward. See more In botany, the Cholodny–Went model, proposed in 1927, is an early model describing tropism in emerging shoots of monocotyledons, including the tendencies for the shoot to grow towards the light (phototropism) … See more The model was independently proposed by the Russian scientist Nikolai Cholodny of the University of Kyiv in 1927 and by Frits Warmolt Went of … See more Evidence that supports Cholodny–Went over competing theories was reported by Iino and Briggs in 1984, showing that there was decreased growth on the lighted side of a corn coleoptile and increased growth of the shaded side. Experiments on Arabidopsis thaliana in … See more The theory was widely accepted when first proposed, but began to receive serious criticism in the mid-1980s. Arguments against the model have included views that growth … See more WebDec 1, 1996 · The Cholodny-Went hypothesis holds that gravitropic curvature of a growing plant organ depends on regulated transport of the plant hormone auxin; new studies of the agravitropic mutant aux1 of Arabidopsis provide strong evidence in support of this hypothesis. Plant tropisms: the ins and outs of auxin Curr Biol.
Cholodny-went hypothesis
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WebApr 1, 1999 · The Cholodny-Went hypothesis of gravitropism suggests that the graviresponse is controlled by the distribution of auxin. However, the mechanism of auxin transport during the graviresponse of roots is still unresolved. WebDec 16, 2006 · According to the Cholodny–Went hypothesis, gravitropic differential growth is brought about by the redistribution of auxin (indolyl-3-acetic acid, IAA). We reinvestigated the relevance of different auxins and studied the role of ethylene in hypocotyls of sunflower and shoots and roots of rye and maize seedlings.
WebApr 1, 1994 · Results indicate that IAA induces growth by a mechanism independent of cell-wall acidification, consistent with the acid-growth hypothesis of FC action. SUMMARY Excised coleoptile segments that were depleted of endogenous auxin after pre-incubation in water respond to the phytotoxin fusicoccin (FC) and the plant hormone auxin (indole-3 … WebThe anatomy and morphology of these graviresponding organs indicates a certain spatial separation between the sensing region and the responding one, a situation that strongly suggests the requirement of phytohormones as mediators to coordinate the process. The Cholodny-Went hypothesis suggested auxin as the main mediator of gravitropism.
WebOne idea that has been around for >70 years is Cholodny–Went's hypothesis of gravitropism. This proposes that the differential growth characteristic of the gravitropic … WebGravitropism is explained by the Cholodny-Went hypothesis: the basipetal flow of auxin is diverted laterally. The resulting lateral auxin gradient triggers asymmetric growth. However, the...
WebThe Cholodny-Went Hypothesis. N. O. Cholodny and Went independently proposed that phototropism results from an asymmetric distribution of auxin •Their hypothesis makes three predictions: 1.1. Auxin produced at the tips moves from the light 2. side to the dark side 3.2. Auxin is transported down one side of the
WebAbstract. The existence of different auxin sensitivities in epidermal and subepidermal tissues (KV Thimann, CL Schneider 1938 Plant Physiol 25: 627-641) suggests a refinement to … free gap year programs in israelWebThe Cholodny–Went hypothesis, developed in the early 20th century, predicts that in the presence of asymmetric light, auxin will move towards the shaded side and promote elongation of the cells on that side to … free gap analysis powerpoint templateWeb植物重力生物学的Cholodny-Went假说研究进展 来自 国家科技图书文献中心 喜欢 0 阅读量： 53 作者： 刘承宪 摘要： 本文着重介绍生长素在植物向重性生长反应中作用的研究进 … free garageband download for windowsWebJul 1, 1987 · Abstract The existence of different auxin sensitivities in epidermal and subepidermal tissues (KV Thimann, CL Schneider 1938 Plant Physiol 25: 627-641) suggests a refinement to the Cholodny-Went theory which overcomes some of the difficulties associated with it. free garageband alternative for windowsWebThe Cholodny–Went model for the phototropic movement of shoots was later extended to gravitropism of roots, where auxin was thought to inhibit rather than stimulate growth and … free garageband alternativesWebDec 1, 1996 · The Cholodny–Went hypothesis holds that gravitropic curvature of a growing plant organ depends on regulated transport of the plant hormone auxin; new studies of the agravitropic mutant aux1 of Arabidopsis provide strong evidence in … free gantt chart power bihttp://labs.biology.ucsd.edu/estelle/publications/Estelle.1996.pdf free gap year