2025-05-21 東京大学
図1:PATROL1遺伝子の発現量を高めることで、乾燥ストレス下の植物の成長が強化される
<関連情報>
- https://www.a.u-tokyo.ac.jp/topics/topics_20250521-1.html
- https://academic.oup.com/pnasnexus/advance-article/doi/10.1093/pnasnexus/pgaf151/8128352
PATROL1を介したH+-ATPaseトランスロケーションは、根と葉の機能を最適化することにより、干ばつ下での植物の成長を促進する PATROL1-mediated H+-ATPase translocation boosts plant growth under drought by optimizing root and leaf functions
Naoya Katsuhama , Kazuma Sakoda , Haruki Kimura , Yutaro Shimizu , Yuuki Sakai , Kenji Nagata , Mitsutomo Abe , Ichiro Terashima , Wataru Yamori
PNAS Nexus Published:10 May 2025
DOI:https://doi.org/10.1093/pnasnexus/pgaf151
Abstract
Optimizing leaf photosynthesis and root water and mineral uptake in crops during drought is crucial for enhancing agricultural productivity under climate change. Although plasma membrane H+-ATPase plays a key role in plant physiological processes, its overexpression alone does not consistently improve growth. While PROTON ATPASE TRANSLOCATION CONTROL 1 (PATROL1) regulates H+-ATPase translocation in response to various environmental stimuli in leaves, its function in roots remains largely unknown. Here we show that H+-ATPase was coimmunoprecipitated with PATROL1 in roots of Arabidopsis thaliana. Under hyperosmotic stress, PATROL1 overexpression line had significantly greater root length and lateral root numbers than wild type and knockout lines. Micrografting between wild type and PATROL1 knockout or overexpression lines showed that PATROL1 is indispensable in both shoots and roots, indicating that root uptake and leaf photosynthesis are simultaneous limiting factors for plant growth under soil water deficit. Compared to the wild type, PATROL1 overexpression in whole plants resulted in a 41% increase in shoot dry weight and a 43% increase in shoot nitrogen content under drought conditions. These findings highlight the potential of H+-ATPase regulation in both roots and shoots as a new strategy to improve plant productivity, particularly under drought conditions.
