Uptake and translocation of foliar-applied glycinebetaine in crop plants
Uptake and translocation of foliar-applied glycinebetaine in crop plants
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DOI：
10.1016/s0168-9452(96)04527-x
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发表时间：
1996-12-20
期刊：
影响因子：
5.2
通讯作者：
Somersalo, S
中科院分区：
文献类型：
--
作者：
Makela, P;PeltonenSainio, P;Somersalo, S
甘氨酸甜菜碱是一种植物保护剂，在盐和干旱胁迫下在某些植物中积累。将外源甜菜碱应用于不能合成甜菜碱的作物是克服作物生产的环境限制的一种可能途径。然而，关于植物吸收和转运叶面施用的甘氨酸甜菜碱的能力的信息是有限的。本研究以夏芜菁油菜为试材，研究了外源甜菜碱溶液对油菜叶片的处理效果。SSP. oleifera）、大豆[Glycine inns（L.）Merr.]，豌豆（豌豆）、番茄（Lycopersicon esculentum Mill.），和春小麦（Triticum aestivum L.）在温室实验中。使用高效液相色谱法监测甘氨酸甜菜碱的摄取。将[C-14]甘氨酸甜菜碱施用于芜菁油菜植物的叶片，并通过放射自显影监测其向其他植物器官的转运。[C-14]甘氨酸甜菜碱在施用后2小时内转移到根部。施用后一天，标记的甘氨酸甜菜碱被转移到芜菁油菜植物的所有植物部分。结果表明，植物能够将叶面施用的甘氨酸甜菜碱从其叶片转移到其他器官，并且表面活性剂的使用加速了叶面施用的甘氨酸甜菜碱的渗透。根据我们的研究结果，甜菜碱在植物细胞中是相当惰性的终产物，主要是韧皮部移动的。此外，环境条件的影响，叶面喷施甜菜碱的吸收和转运率。版权所有（C）1996 Elsevier Science爱尔兰有限公司
Glycinebetaine is known as an osmoprotectant which is accumulated in certain plant species under salt and drought stresses. Exogenous applications of glycinebetaine on crop plants unable to synthesise glycinebetaine is a possible approach to overcome the environmental limitations of crop production. Information about the capability of plants to take up and translocate foliar-applied glycinebetaine is, however, limited. In this study, glycinebetaine solution, with and without surfactants, was exogenously applied to foliage of summer turnip rape (Brassica rapa L. ssp. oleifera), soybean [Glycine inns (L.) Merr.], pea (Pisum sativum L.), tomato (Lycopersicon esculentum Mill.), and spring wheal (Triticum aestivum L.) in greenhouse experiments. Uptake of glycinebetaine was monitored using high-performance liquid chromatography. [C-14]glycinebetaine was applied to leaves of turnip rape plants and translocation to other plant organs was monitored autoradiographically. [C-14]glycinebetaine was translocated to roots within two hours of application. One day after application labelled glycinebetaine was translocated to all plant parts of turnip rape plants. The results indicate that plants are able to translocate foliar-applied glycinebetaine from their leaves to other organs, and that the use of surfactants accelerates the penetration of foliar-applied glycinebetaine. According to our results glycinebetaine is quite inert end-product in plant cells being mainly phloem-mobile. Moreover, environmental conditions are shown to affect the uptake and translocation rates of foliar-applied glycinebetaine. Copyright (C) 1996 Elsevier Science Ireland Ltd