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Plasma membrane H+-ATPase overexpression increases rice yield via simultaneous enhancement of nutrient uptake and photosynthesis

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.

Description: https://lh3.googleusercontent.com/ahByc7UGyHOA1t9wuBuIlLzVCbzM8GKj24QWn4pgdAa4qGiIn0nxcUXWn6HqGZ1PuaOVcl235dHdIBS4NWwO3DqCm6krJ76tGOBH72W5kbsHFuExyKzXn1-qfQGMn2hc682pOj4

 

Maoxing ZhangYin WangXi ChenFeiyun XuMing DingWenxiu YeYuya KawaiYosuke TodaYuki HayashiTakamasa SuzukiHouqing ZengLiang XiaoXin XiaoJin XuShiwei GuoFeng YanQirong ShenGuohua XuToshinori Kinoshita & Yiyong Zhu

Nature Communications volume 12, 02 February 2021; Article number: 735 (2021) 

 

Abstract

 

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.

 

See: https://www.nature.com/articles/s41467-021-20964-4

 

Description: figure1

Figure 1: Plasma membrane (PM) H+-ATPase regulates ammonium (NH4+) uptake in rice.

a 15NH4+ absorption rate in wild-type (WT) rice. To determine 15NH4+ absorption rates, rice seedlings were incubated in 2 mM 15NH4+ solution with 5 μM fusicoccin (FC) for 30 min under dark or illuminated conditions. b Average transpiration rates of rice leaves under dark and illuminated conditions over 30 min. Small circles in ab represent data points for individual experiments; three biological replicates were analysed for each treatment. Columns and error bars in ab represent the means ± standard errors (SEs; n = 3). Differences were evaluated using the two-tailed Student’s t test (*P < 0.05; ***P < 0.005; n.s., not significant). The exact P values are 0.0018 (mock in dark vs. FC in dark), 0.0025 (mock in dark vs. mock in light), 0.0143 (mock in light vs. FC in light) and 0.0016 (FC in dark vs. FC in light) for (a); 0.8194 (mock in dark vs. FC in dark), 0.0006 (mock in dark vs. mock in light), 0.0851 (mock in light vs. FC in light), and 4.27 × 10−5 (FC in dark vs. FC in light) for (b). n.s. Not significant.

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