Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environment Sciences, Nanjing Agricultural University, Nanjing, China.
Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, Japan.
Nat Commun. 2021 Feb 2;12(1):735. doi: 10.1038/s41467-021-20964-4.
Nitrogen (N) and carbon (C) are essential elements for plant growth and crop yield. Thus, improved N and C utilisation contributes to agricultural productivity and reduces the need for fertilisation. In the present study, we find that overexpression of a single rice gene, Oryza sativa plasma membrane (PM) H-ATPase 1 (OSA1), facilitates ammonium absorption and assimilation in roots and enhanced light-induced stomatal opening with higher photosynthesis rate in leaves. As a result, OSA1 overexpression in rice plants causes a 33% increase in grain yield and a 46% increase in N use efficiency overall. As PM H-ATPase is highly conserved in plants, these findings indicate that the manipulation of PM H-ATPase could cooperatively improve N and C utilisation, potentially providing a vital tool for food security and sustainable agriculture.
氮（N）和碳（C）是植物生长和作物产量的必需元素。因此，提高 N 和 C 的利用率有助于提高农业生产力，并减少施肥的需求。在本研究中，我们发现，过量表达单个水稻基因，水稻质膜 H+-ATPase 1（OSA1），可促进根系对铵的吸收和同化，并增强光照诱导的气孔开放，从而提高叶片的光合作用速率。因此，水稻植株中 OSA1 的过表达导致其产量增加 33%，整体 N 利用率提高 46%。由于质膜 H+-ATPase 在植物中高度保守，这些发现表明，对质膜 H+-ATPase 的操纵可以共同提高 N 和 C 的利用率，为粮食安全和可持续农业提供了一个重要工具。
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