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白羽扇豆(Lupinus albus L.)对磷和生长素表现出高度的根系形态和生理可塑性反应,然而磷和生长素如何调节根形态和生理特性以及它们对根形态和生理的交互效应尚不清楚.本研究通过水培实验旨在评价磷(0或250μmol/L)和生长素(10-8mol/LNAA)对白羽扇豆根特性的影响及其交互效应.结果表明,缺少磷和生长素施用均明显改变了白羽扇豆的根形态(主根长度减少、一级侧根数目增加和排根大量形成)和生理特性(质子释放、柠檬酸分泌和酸性磷酸酶活性增加).外源生长素的施用增加了缺磷白羽扇豆根系的响应度和敏感性.磷和生长素对白羽扇豆根系形态和生理具有明显的交互作用.主成分分析表明,磷解释了根特性64.8%的信息,而生长素解释了21.3%的信息,表明磷供应对白羽扇豆根特性的影响比外源生长素施用更为重要.白羽扇豆能够通过协调根系形态和生理对外部刺激(如缺磷和施用生长素)作出应答,以及优化根形态和生理之间的关系从而最大化获取磷素资源.
Lupinus albus L. (Lupinus albus L.) showed a high root morphology and physiological plasticity response to phosphorus and auxin. However, it is unclear how phosphorus and auxin regulate the morphological and physiological characteristics of roots and their interactive effects on root morphology and physiology The objective of this study was to evaluate the effects of phosphorus (0 or 250μmol / L) and auxin (10-8mol / LNAA) on the root characteristics of white lupine and their interaction effects by hydroponic experiments.The results showed that both the application of phosphorus and auxin Obviously changed the root morphology of white lupins (the decrease of main root length, the increase of the number of lateral roots and the large number of root exudates) and the physiological characteristics (proton release, citric acid secretion and acid phosphatase activity increase) .The application of exogenous auxin increased Phosphate and auxin had a significant interaction on root morphology and physiology of white lupine.The principal component analysis showed that phosphorus explained 64.8% of the information of the root characteristics, while auxin explained 21.3% of the information, indicating that the phosphorus supply on the white lupine root characteristics than the application of auxin is more important.White lupins can coordinate the root morphology and physiology of external stimuli (such as the lack of And administration of growth hormone) respond, as well as to optimize the relationship between root morphology and physiology to maximize the acquisition of phosphorus resources.