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Auxins (plural of auxin / ˈ ɔː k s ɪ n /) are a class of plant hormones (or plant-growth regulators) with some morphogen-like characteristics. Auxins play a cardinal role in coordination of many growth and behavioral processes in plant life cycles and are essential for plant body development.
Plant physiologists have identified four different stages the plant goes through after the apex is removed (Stages I-IV). The four stages are referred to as lateral bud formation, "imposition of inhibition" (apical dominance), initiation of lateral bud outgrowth following decapitation, and; elongation and development of the lateral bud into a ...
Polar auxin transport (PAT) is directional and active flow of auxin molecules through the plant tissues. The flow of auxin molecules through the neighboring cells is driven by carriers (type of membrane transport protein) in the cell-to-cell fashion (from one cell to other cell and then to the next one) and the direction of the flow is determined by the localization of the carriers on the ...
Within the 20-year timespan, many scientists have actively contributed to examining and reevaluating Hager's acid-growth hypothesis. Despite the accumulation of observations that evidently identify the final target of the auxin-induced action to be H +-ATPase, which excretes H + protons to the apoplast and take in K + ions through its rectifying K + channel in the following years, the ...
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Simple plant hormone table with location of synthesis and effects of application — this is the format used in the description templates at bottom of Wikipedia articles about plant hormones. Hormonal Regulation of Gene Expression and Development — Detailed introduction to plant hormones, including genetic information.
Ethylene and auxin complement JA by influencing cell elongation and asymmetric growth, both critical for thigmomorphogenesis. Ethylene production increases in mechanically stimulated plants and is linked to radial expansion and stem thickening, traits that enhance structural stability against mechanical forces like wind.
A plant will abscise a part either to discard a member that is no longer necessary, such as a leaf during autumn, or a flower following fertilisation, or for the purposes of reproduction. Most deciduous plants drop their leaves by abscission before winter, whereas evergreen plants continuously abscise their leaves. Another form of abscission is ...