近日，由沈阳农大张志宏团队在PCE发表了题为《FvPHR1 Improves the Quality of Woodland Strawberry Fruit by Up-Regulating the Expression of FvPHT1;7 and FvSWEET9》的研究论文，揭示了PHR1通过上调PHT1;7和SWEET9的表达改善林地草莓果实的品质。
磷（P）对植物生长至关重要，持续施用磷肥可以增加产量和质量，但也会导致环境污染。植物通过复杂的信号通路维持稳定的磷酸盐（Pi）供应。
植物中磷饥饿反应1（PHR1）是植物Pi饥饿信号的的关键调节因子，使植物能够保持足够的Pi水平。然而，PHR1在果实品质中的作用尚不清楚。
在本研究中，作者通过在草莓中过表达FvPHR1基因确定了FvPHR1的功能。作者通过研究植物表型和分析RNA-Seq数据，鉴定并验证了两个FvPHR1的下游基因。FvPHR1直接增强了磷酸转运蛋白1;7（FvPHT1;7）的表达，增加了Pi的吸收并提高了光合效率。此外，FvPHR1上调了糖输出转运蛋白9（FvSWEET9）的表达，该蛋白编码一种促进从叶片到果实的糖运输的糖转运蛋白。
FvPHR1可以通过磷酸信号通路增强源处的光合产物，并通过FvSWEET9促进向汇处的糖运输。FvPHR1在提高果实品质方面发挥着复杂的作用，为开发具有高效Pi利用过程和高糖含量的草莓品种提供了分子基础。
Phosphorus (P) is vital for plant growth, and continuous P fertiliser application is necessary to increase yield and quality, but it can cause environmental pollution. Plants maintain a steady phosphate (Pi) supply through complex signalling pathways. Phosphate starvation response 1 (PHR1), a key regulator of Pi starvation signals in plants, enables plants to maintain a sufficient Pi level. However, the role of PHR1 in fruit quality remains unclear. In this study, we determined the function of PHR1 in Fragaria vesca (FvPHR1) by overexpressing the FvPHR1 gene. We identified and validated two downstream genes of FvPHR1 by investigating plant phenotypes and analysing RNA-Seq data. FvPHR1 directly enhanced the expression of phosphate transporter 1;7 (FvPHT1;7), increasing Pi uptake and improving photosynthesis efficiency. Additionally, FvPHR1 upregulated the expression of sugar will eventually be exported transporter 9 (FvSWEET9), which encodes a sugar transporter that facilitates sugar transport from leaves to fruit. FvPHR1 can enhance photosynthetic products in a source via the phosphate signalling pathway and facilitate sugar transport to a sink through FvSWEET9. FvPHR1 plays a complicated role in improving fruit quality, providing a molecular foundation for developing strawberry cultivars with highly efficient Pi utilisation processes and high sugar content.
本公众号免费发布招聘信息和宣传科研成果
已推送文献可提供PDF，如有需要，文章后留言即可
欢迎联系微信：506911145 或邮箱506911145@qq.com
