Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
Institute for Advanced Research, NAIAS, Nagoya University, Frocho, Chikusa, Nagoya 464-8601, Japan.
Int J Mol Sci. 2020 Apr 23;21(8):2971. doi: 10.3390/ijms21082971.
Recent studies have shown various metabolic and transcriptomic interactions between sulfur (S) and phosphorus (P) in plants. However, most studies have focused on the effects of phosphate (Pi) availability and P signaling pathways on S homeostasis, whereas the effects of S availability on P homeostasis remain largely unknown. In this study, we investigated the interactions between S and P from the perspective of S availability. We investigated the effects of S availability on Pi uptake, transport, and accumulation in grown under sulfur sufficiency (+S) and deficiency (-S). Total P in shoots was significantly increased under -S owing to higher Pi accumulation. This accumulation was facilitated by increased Pi uptake under -S. In addition, -S increased root-to-shoot Pi transport, which was indicated by the increased Pi levels in xylem sap under -S. The -S-increased Pi level in the xylem sap was diminished in the disruption lines of and , which are involved in root-to-shoot Pi transport. Our findings indicate a new aspect of the interaction between S and P by listing the increased Pi accumulation as part of -S responses and by highlighting the effects of -S on Pi uptake, transport, and homeostasis.
最近的研究表明，硫（S）和磷（P）在植物中有各种代谢和转录组相互作用。然而，大多数研究都集中在磷酸盐（Pi）可用性和 P 信号通路对 S 稳态的影响上，而 S 可用性对 P 稳态的影响在很大程度上仍然未知。在这项研究中，我们从 S 可用性的角度研究了 S 和 P 之间的相互作用。我们研究了在硫充足（+S）和缺乏（-S）条件下生长的植株中 S 可用性对 Pi 吸收、运输和积累的影响。由于 Pi 积累增加，-S 下地上部总磷显著增加。这种积累是由于 -S 下 Pi 吸收增加而促进的。此外，-S 增加了根到地上部的 Pi 运输，这表现在 -S 下木质部汁液中的 Pi 水平增加。在涉及根到地上部 Pi 运输的 和 缺失系中，木质部汁液中 -S 增加的 Pi 水平减少。我们的发现通过将增加的 Pi 积累列为 -S 反应的一部分，并强调 -S 对 Pi 吸收、运输和稳态的影响，列出了 S 和 P 之间相互作用的一个新方面。
