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Trans-organ analysis of gene co-expression networks reveals a mobile long-distance regulator that balances shoot and root development in Arabidopsis

文献类型： 外文期刊

作者： Ye, Jia Yuan 1 ; Sakuraba, Yasuhito 2 ; Zhuo, Meng Na 2 ; Torii, Yousuke 2 ; Ohtsuki, Namie 2 ; Tian, Wen Hao 3 ; Jin, Chong Wei 1 ; Zheng, Shao Jian 1 ; Mochida, Keiichi 4 ; Yanagisawa, Shuichi 2 ;

作者机构： 1.Zhejiang Univ, Coll Life Sci, State Key Lab Plant Environm Resilience, Hangzhou, Peoples R China

2.Univ Tokyo, Agrobiotechnol Res Ctr, Grad Sch Agr & Life Sci, Tokyo, Japan

3.China Natl Rice Res Inst, State Key Lab Rice Biol & Breeding, Hangzhou, Peoples R China

4.RIKEN, Ctr Sustainable Resource Sci, Bioprod Informat Res Team, Yokohama, Japan

期刊名称：NATURE PLANTS （ 影响因子：13.6； 五年影响因子：17.0 ）

ISSN： 2055-026X

年卷期： 2025 年 11 卷 8 期

页码：

收录情况： SCI

摘要： Long-distance regulation between individual organs is a fundamental process for the optimized adaptation of the plant body to diverse environments. However, systematic methods for identifying key genes for long-distance regulation are currently unavailable. Here we present a new approach, trans-organ analysis of gene co-expression networks, which offers a unique way of identifying candidates for such genes. This approach revealed that TGA7 functions as a shoot-to-root mobile bZIP transcription factor in Arabidopsis to activate photosynthetic genes directly in shoots and nitrate-uptake-related genes, both directly and via a transcriptional cascade, in roots. Analysis of grafted chimeras showed that nitrogen-deficiency-induced enhanced TGA7 expression in shoot vascular tissue promotes TGA7 protein accumulation in roots, boosting root growth and nitrate uptake. Furthermore, the loss of TGA7-mediated long-distance regulation perturbed the balance between shoot and root development under nitrogen deficiency. These findings underscore the utility of our approach for uncovering long-distance regulation in plants.

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