Marzec Marek, Muszynska Aleksandra, Gruszka Damian
Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice 40-032, Poland.
Int J Mol Sci. 2013 Apr 29;14(5):9286-304. doi: 10.3390/ijms14059286.
Strigolactones (SLs) are a new group of plant hormones, which have been intensively investigated during the last few years. The wide spectrum of SLs actions, including the regulation of shoot/root architecture, and the stimulation of the interactions between roots and fungi or bacteria, as well as the stimulation of germination of parasitic plants, indicates that this group of hormones may play an important role in the mechanisms that control soil exploration, and the root-mediated uptake of nutrients. Current studies have shown that SLs might be factors that have an influence on the plant response to a deficiency of macronutrients. Experimental data from the last four years have confirmed that the biosynthesis and exudation of SLs are increased under phosphorus and nitrogen deficiency. All these data suggest that SLs may regulate the complex response to nutrient stress, which include not only the modification of the plant developmental process, but also the cooperation with other organisms in order to minimize the effects of threats. In this paper the results of studies that indicate that SLs play an important role in the response to nutrient stress are reviewed and the consequences of the higher biosynthesis and exudation of SLs in response to phosphorus and nitrogen deficiency are discussed.
独脚金内酯（SLs）是一类新型植物激素，在过去几年中受到了深入研究。独脚金内酯具有广泛的作用，包括调控地上部/根系结构、促进根系与真菌或细菌之间的相互作用以及刺激寄生植物种子萌发，这表明这类激素可能在控制根系探索土壤和根介导的养分吸收机制中发挥重要作用。目前的研究表明，独脚金内酯可能是影响植物对大量元素缺乏响应的因素。过去四年的实验数据证实，在磷和氮缺乏的情况下，独脚金内酯的生物合成和分泌会增加。所有这些数据表明，独脚金内酯可能调节对养分胁迫的复杂响应，这不仅包括改变植物发育过程，还包括与其他生物合作以尽量减少威胁的影响。本文综述了表明独脚金内酯在对养分胁迫响应中起重要作用的研究结果，并讨论了独脚金内酯在磷和氮缺乏时生物合成和分泌增加的后果。
