Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, 40-032 Katowice, Poland.
Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), D-06466 Gatersleben, Germany.
Int J Mol Sci. 2018 Jun 27;19(7):1887. doi: 10.3390/ijms19071887.
Strigolactones (SLs) constitute a group of plant hormones which are involved in multiple aspects of plant growth and development. Beside their role in shoot and root development and plant architecture in general, SLs are also involved in plant responses to nutrient deficiency by promoting interactions with symbiotic organisms and via promotion of root elongation. Recent observations on the cross talk between SLs and other hormones demonstrate that the inhibition of adventitious root formation by ethylene is independent of SLs. Additionally, it was shown that root exposure to SLs leads to the accumulation of secondary metabolites, such as flavonols or antioxidants. These data suggest pleiotropic effects of SLs, that influence root development. The discovery that the commonly used synthetic SL analogue racGR24 might also mimic the function of other plant growth regulators, such as karrikins, has led us to consider the previously published publications under the new aspects. This review summarizes present knowledge about the function of SLs in shaping root systems under optimal and nutrient deficiency conditions. Results which appear inconsistent with the various aspects of root development are singled out.
独脚金内酯（SLs）是一组植物激素，参与植物生长和发育的多个方面。除了在芽和根发育以及一般植物结构中的作用外，SLs 还通过促进与共生生物的相互作用和促进根伸长来参与植物对养分缺乏的反应。最近关于 SLs 与其他激素之间相互作用的观察表明，乙烯对不定根形成的抑制作用与 SLs 无关。此外，还表明根暴露于 SLs 会导致黄酮醇或抗氧化剂等次生代谢物的积累。这些数据表明 SLs 具有影响根系发育的多效性作用。发现常用的合成 SL 类似物 racGR24 也可能模拟其他植物生长调节剂（如卡利金）的功能，这促使我们从新的角度考虑以前发表的出版物。本综述总结了目前关于 SLs 在优化和养分缺乏条件下塑造根系功能的知识。挑出了与根系发育的各个方面不一致的结果。
