无机溶质对植物生长素结合的影响。
Effects of inorganic solutes on the binding of auxin.
机构信息
Department of Horticulture, Purdue University, Lafayette, Indiana 47907.
出版信息
Plant Physiol. 1976 Dec;58(6):783-5. doi: 10.1104/pp.58.6.783.
Abstract
The binding of alpha-naphthaleneacetic acid ((14)C-NAA) to pelletable particulates from corn (Zea mays) coleoptiles was found to be influenced by inorganic solutes. La(3+), Ca(2+), and Mg(2+) increased the binding whereas monovalent cations did not. The concentrations of CaCl(2) which increased auxin binding were similar to those which inhibited coleoptile elongation in the presence of auxin. These results are interpreted as suggesting that the alteration of hormonal effectiveness by some inorganic solutes involves alterations in the attachment of the hormone to binding sites in the cell.
摘要
发现玉米（Zea mays）胚芽鞘可沉淀颗粒对α-萘乙酸（（14）C-NAA）的结合受到无机溶质的影响。La（3+）、Ca（2+）和 Mg（2+）增加了结合，而单价阳离子则没有。增加生长素结合的 CaCl2 浓度与在生长素存在下抑制胚芽鞘伸长的浓度相似。这些结果表明，某些无机溶质对激素效力的改变涉及激素与细胞结合位点的附着的改变。
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