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Red Light Regulation Of Ethylene Biosynthesis And Gravitropism In Etiolated Pea Stems, C. L. Steed, L. K. Taylor, Marcia Harrison-Pitaniello Phd
Red Light Regulation Of Ethylene Biosynthesis And Gravitropism In Etiolated Pea Stems, C. L. Steed, L. K. Taylor, Marcia Harrison-Pitaniello Phd
Biological Sciences Faculty Research
During gravitropism, the accumulation of auxin in the lower side of the stem causes increased growth and the subsequent curvature, while the gaseous hormone ethylene plays a modulating role in regulating the kinetics of growth asymmetries. Light also contributes to the control of gravitropic curvature, potentially through its interaction with ethylene biosynthesis. In this study, red-light pulse treatment of etiolated pea epicotyls was evaluated for its effect on ethylene biosynthesis during gravitropic curvature. Ethylene biosynthesis analysis included measurements of ethylene; the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC); malonyl-conjugated ACC (MACC); and expression levels of pea ACC oxidase (Ps-ACO1) and …