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首页> 外文期刊>Plant and Soil >The accumulation and transport of abscisic acid insoybean (Glycine max L.) under aluminum stress
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The accumulation and transport of abscisic acid insoybean (Glycine max L.) under aluminum stress

机译：铝胁迫下脱落酸大豆（Glycine max L.）的积累和转运

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Abscisic acid (ABA) plays an important role in mediating some biotic and abiotic stresses. In the present study, to better understand the relationship of ABA production and Aluminum (Al)-resistance in plants, Al-resistance genotype (Jiyu70) of soybean was adopted to investigate the accumulation and transport of ABA in plants exposed to Al. Results showed that exogenous application of ABA and ABA synthesis inhibitor-fluridone respectively increased and reduced endogenous ABA content in root apices of soybean, and results in the corresponding reduction and aggravation of Al toxicity. Increasing of either Al concentration (0–50 μM) or treatment duration (0–12 h, 30 μM Al) cause a higher inhibition of root elongation and ABA accumulation in root apices of soybean. Al-induced enhancement of endogenous ABA production not only was in roots but also in leaves, whereas La3+ (behaves similarly as Al3+ at the level of cell surface) only increased ABA accumulation in roots. In split-root experiments, Al treatment in two parts of roots (Part A, + Al; Part B, + Al) both decreased root elongation and increased ABA accumulation in root apices of soybean. Whereas when only part A of roots was exposed to Al (Part A, + Al; Part B, -Al), endogenous ABA content in root apices increased in part A but inversely in part B, but root elongation inhibition only was found in part A. Using [3H]-ABA radioisotope technique, it was found that [3H]-ABA can transport at the rate of more than 3.2 cm·min−1 in the whole plants, and this can be accelerated by Al supply. In addition, [3H]-ABA tended to distribute in the root part under Al stress. Together, these results suggest that ABA may play an important role in regulating Al resistance of soybean as an Al-stress signal.
机译：脱落酸（ABA）在介导某些生物和非生物胁迫中起重要作用。在本研究中，为了更好地了解植物中ABA的产生与抗铝（Al）的关系，采用大豆的抗铝基因型（Jiyu70）来研究ABA在暴露于Al的植物中的积累和转运。结果表明，外源施用ABA和ABA合成抑制剂氟啶酮可分别增加和减少大豆根尖内源性ABA的含量，并相应降低和加剧Al的毒性。铝浓度（0–50μM）或处理持续时间（0–12 h，30μMAl）的增加会导致对大豆根尖中根伸长和ABA积累的更高抑制。 Al诱导的内源ABA产生增强不仅在根部而且在叶片中，而La 3 + （在细胞表面水平上与Al 3 + 类似）仅增加了ABA在根中的积累。在分根实验中，对大豆根部两部分（A部分，+ A1； B部分，+ A1）的铝处理既降低了根系的伸长，又增加了大豆根尖中ABA的积累。而当仅根的一部分A暴露于Al时（A部分，+ Al； B部分，-Al），A部分的根尖内源ABA含量增加，而B部分则相反，但根部分只有根伸长抑制作用答：使用[ 3 H] -ABA放射性同位素技术，发现[ 3 H] -ABA的传输速率可以超过3.2 cm·min -1 ，这可以通过铝的供应来加速。另外，[ 3 H] -ABA在铝胁迫下倾向于分布在根部。总之，这些结果表明ABA可能作为铝胁迫信号在调节大豆的铝抗性中发挥重要作用。

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