文献类型： 外文期刊

作者： Gao, H. J. ² ; Yang, H. Q. ¹ ;

作者机构： 1.Shandong Agr Univ, Coll Hort Sci & Engn, Tai An 271018, Shandong, Peoples R China

2.Shandong Inst Pomol, Tai An, Shandong, Peoples R China

关键词： indole-3-butyric acid;quercetin;root;sodium nitroprusside

期刊名称：PLANT SOIL AND ENVIRONMENT （ 影响因子：1.799； 五年影响因子：2.169 ）

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收录情况： SCI

摘要： The time-dependent production of nitric oxide (NO) in roots induced by indole-3-butyric acid (IBA) and the effect of sodium nitroprusside (SNP) on root architecture development were investigated, using Malus hupehensis Rehd. seedlings. Following IBA application, a very rapid increase in NO formation and a subsequent second wave of NO burst was observed, which was related to the induction of lateral roots (LRs) and the organogenesis of lateral root primordia (LRP), respectively. The first NO burst wascorrelated with the secondand the two peaks of NO burst induced by IBA were totally abolished by 3,3',4',5,7-pentahydroxyflavone (quercetin). Exogenous NO promoted the emergence and elongationof LR and inhibited the elongation of primary root (PR) in a dose-dependent manner: low concentrations of SNP promoted both the amounts and the elongation of LR but inhibited the elongation of LR and PR at higher concentrations. It was concluded that (i)the rapid production of NO induced by IBA was correlated with the IBA-induced initiation of LR, (ii) quercetin inhibition of IBA-induced LR formation was correlated with the quercetin inhibition of IBA-induced NO biosynthesis, and (iii) exogenous NO affects the development of root system architecture in a dose-dependent manner.