auxin

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Auxin is one of the phytohormones. Auxin is basically represented as indol-3-acetic acid (IAA) in plants. It is important in regulating various growths and formation processes (Kefeli & Kalevitch, 2003). Auxin is essential in many vital tasks in plants. Therefore, plants which are unable to produce IAA do not exist. The role of auxin is described by “short distance activity” as a morphogen (Friml, 2003). The term morphogen was probably first being used by the British mathematician Alan Mathison Turing (1912-1954) to understand about the differentiation of Hydra. By dictionary definition, morphogens are chemicals which regulate morphogenesis. However from the perspective of biologists, morphogens are substances which form a concentration gradient, and can actually be viewed as flowing substances. The analyses of IAA levels are too low to provide information on IAA level in individual cells with the current sensitivities of the available methods (Galun, 2010). In adult plants, the source of auxin presumed in the tips of the shoots and in young leaves. Auxin causes apical dominance and ...

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