Absorption of momilactone A and B by Arabidopsis thaliana L. and the growth inhibitory effects
Absorption of momilactone A and B by Arabidopsis thaliana L. and the growth inhibitory effects
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DOI：
10.1016/j.jplph.2012.05.022
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发表时间：
2012-10-15
影响因子：
4.3
通讯作者：
Kujime, Hiroya
中科院分区：
文献类型：
--
作者：
Kato-Noguchi, Hisashi;Ota, Katsumi;Kujime, Hiroya
虽然大多数化感物质可能会引起受体植物的生长抑制，但有关受体植物对这些化感物质的吸收的信息很少。本文研究了拟南芥（Arabidopsis thaliana，L）对豆蔻内酯A和B的吸收及其对拟南芥生长的影响。当浓度大于10 μ mol/L和1 μ mol/L时，毛霉内酯A和B分别抑制拟南芥下胚轴和根的生长。拟南芥下胚轴中的豆蔻内酯A和B的水平分别约为培养基中豆蔻内酯A和B的3.2和2.4%，而拟南芥根中的豆蔻内酯A和B的水平分别约为3.9- 3.4%。拟南芥对豆蔻内酯A和B的吸收速率无显著差异。本研究表明，苦瓜内酯A和B的吸收与其施用量成正比，苦瓜内酯A和B的生长抑制作用也可能与其内源水平有关。但豆蔻内酯B对生长的抑制作用远大于豆蔻内酯A，且下胚轴对豆蔻内酯A和B的敏感性大于根。这是首次报道水稻强化感物质-豆蔻内酯A和B被受体植物吸收的研究。(C)2012 Elsevier GmbH. All rights reserved.
Although most allelochemicals can potentially cause growth inhibition in receiver plants, there is little information available about the absorption of these allelochemicals by the receiver plants. The present research describes the absorption of momilactone A and B by Arabidopsis thaliana (L) and effects of the absorption on Arabidopsis growth. Exogenously applied momilactone A and B inhibited the growth of Arabidopsis hypocotyls and roots at concentrations greater than 10 and 1 mu mol/L, respectively. The levels of momilactone A and B in Arabidopsis hypocotyls were approximately 3.2 and 2.4% of momilactone A and B, respectively, in the medium and those in Arabidopsis roots were about 3.9-3.4%, respectively. The absorption rates of momilactone A and B by Arabidopsis were not significantly different. The present research suggests that momilactone A and B may be absorbed in proportion to their applied levels, and the growth inhibitory effects of momilactone A and B may also correlated with their endogenous levels. However, the effectiveness of momilactone B on growth inhibition was much greater than that of momilactone A, and the sensitivities of hypocotyls to momilactone A and B were greater than those of roots. This is the first report describing the absorption of potent rice allelochemicals, momilactone A and B by receiver plants. (C) 2012 Elsevier GmbH. All rights reserved.