Roles for Plasma Membrane Redox Systems in Cell Growth
Correlative evidence from cultured mammalian cells suggests that growth and plasma membrane redox activities are somehow related. This comes in part from studies with hormones, growth factors and anticancer drugs where substances that stimulate or inhibit growth respectively stimulate or inhibit plasma membrane redox activities to corresponding degrees and vice versa (Crane et al., 1985). One possibility is that plasma membrane redox activities are somehow involved in cell cycle control but the mechanisms by which that regulation might be achieved remain obscure. In this report, we have extended the observations from mammalian cells to elongating plant tissues and regulation by auxin hormones where growth is due primarily, if not exclusively, to an increase in cell size.
KeywordsNADH Oxidase Plasma Membrane Vesicle NADH Oxidase Activity Soybean Hypocotyl Isonicotinoyl Hydrazone
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