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Article
2024
Superior glucose metabolism supports NH4+ assimilation in wheat to improve ammonium tolerance
Superior glucose metabolism supports NH4+ assimilation in wheat to improve ammonium tolerance
Abstract (English)
The use of slow-release fertilizers and seed-fertilizers cause localized high-ammonium (NH4 +) environments in agricultural fields, adversely affecting wheat growth and development and delaying its yield. Thus, it is important to investigate the physiological responses of wheat and its tolerance to NH4 + stress to improve the adaptation of wheat to high NH4 + environments. In this study, the physiological mechanisms of ammonium tolerance in wheat (Triticum aestivum) were investigated in depth by comparative analysis of two cultivars: NH4 +-tolerant Xumai25 and NH4 +-sensitive Yangmai20. Cultivation under hydroponic conditions with high NH4 + (5 mM NH4 +, AN) and nitrate (5 mM NO3 -, NN), as control, provided insights into the nuanced responses of both cultivars. Compared to Yangmai20, Xumai25 displayed a comparatively lesser sensitivity to NH4 + stress, as evident by a less pronounced reduction in dry plant biomass and a milder adverse impact on root morphology. Despite similarities in NH4 + efflux and the expression levels of TaAMT1.1 and TaAMT1.2 between the two cultivars, Xumai25 exhibited higher NH4 + influx, while maintaining a lower free NH4 + concentration in the roots. Furthermore, Xumai25 showed a more pronounced increase in the levels of free amino acids, including asparagine, glutamine, and aspartate, suggesting a superior NH4 + assimilation capacity under NH4 + stress compared to Yangmai20. Additionally, the enhanced transcriptional regulation of vacuolar glucose transporter and glucose metabolism under NH4 + stress in Xumai25 contributed to an enhanced carbon skeleton supply, particularly of 2-oxoglutarate and pyruvate. Taken together, our results demonstrate that the NH4 + tolerance of Xumai25 is intricately linked to enhanced glucose metabolism and optimized glucose transport, which contributes to the robust NH4 + assimilation capacity.
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Frontiers in plant science, 15 (2024), 1339105.
https://doi.org/10.3389/fpls.2024.1339105.
ISSN: 1664-462X
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English
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630 Agriculture
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Sustainable Development Goals
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@article{Hu2024,
url = {https://hohpublica.uni-hohenheim.de/handle/123456789/16107},
doi = {10.3389/fpls.2024.1339105},
author = {Hu, Jinling and Zheng, Qiaomei and Neuhäuser, Benjamin et al.},
title = {Superior glucose metabolism supports NH4
+ assimilation in wheat to improve ammonium tolerance},
journal = {Frontiers in plant science},
year = {2024},
volume = {15},
}