Ito Shinsaku, Nozoye Tomoko, Sasaki Eriko, Imai Misaki, Shiwa Yuh, Shibata-Hatta Mari, Ishige Taichiro, Fukui Kosuke, Ito Ken, Nakanishi Hiromi, Nishizawa Naoko K, Yajima Shunsuke, Asami Tadao
Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo, Japan; Department of Bioscience, Faculty of Applied Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya, Tokyo, Japan.
Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo, Japan.
PLoS One. 2015 Mar 20;10(3):e0119724. doi: 10.1371/journal.pone.0119724. eCollection 2015.
Phosphate is an essential macronutrient in plant growth and development; however, the concentration of inorganic phosphate (Pi) in soil is often suboptimal for crop performance. Accordingly, plants have developed physiological strategies to adapt to low Pi availability. Here, we report that typical Pi starvation responses in Arabidopsis are partially dependent on the strigolactone (SL) signaling pathway. SL treatment induced root hair elongation, anthocyanin accumulation, activation of acid phosphatase, and reduced plant weight, which are characteristic responses to phosphate starvation. Furthermore, the expression profile of SL-response genes correlated with the expression of genes induced by Pi starvation. These results suggest a potential overlap between SL signaling and Pi starvation signaling pathways in plants.
磷是植物生长发育过程中必需的大量营养元素；然而，土壤中无机磷（Pi）的浓度往往低于作物生长的最佳水平。因此，植物已经进化出多种生理策略来适应低磷环境。在此，我们报道拟南芥中典型的磷饥饿响应部分依赖于独脚金内酯（SL）信号通路。SL处理诱导了根毛伸长、花青素积累、酸性磷酸酶激活，并降低了植株重量，这些都是对磷饥饿的典型响应。此外，SL响应基因的表达谱与磷饥饿诱导基因的表达相关。这些结果表明植物中SL信号通路和磷饥饿信号通路之间可能存在重叠。
