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Science Advances:高温条件下水稻维持高产和高氮利用效率的分子调控机制

已有 1068 次阅读 2022-11-28 22:03 |个人分类:每日摘要|系统分类:论文交流

High-temperature adaptation of an OsNRT2.3 allele is thermoregulated by small RNAs

第一作者YONG ZHANG

第一单位南京农业大学

通讯作者XIAORONG FAN


 Abstract 

背景回顾:Climate change negatively affects crop yield, which hinders efforts to reach agricultural sustainability and food security.


主要发现Here, we show that a previously unidentified allele of the nitrate transporter gene OsNRT2.3 is required to maintain high yield and high nitrogen use efficiency under high temperatures


结果We demonstrate that this tolerance to high temperatures in rice accessions harboring the HTNE-2 (high temperature resistant and nitrogen efficient-2) alleles from enhanced translation of the OsNRT2.3b mRNA isoform and the decreased abundance of a unique small RNA (sNRT2.3-1) derived from the 5′ untranslated region of OsNRT2.3. sNRT2.3-1 binds to the OsNRT2.3a mRNA in a temperature-dependent manner.


结论Our findings reveal that allelic variation in the 5′ untranslated region of OsNRT2.3 leads to an increase in OsNRT2.3b protein levels and higher yield during high-temperature stress. 


展望Our results also provide a breeding strategy to produce rice varieties with higher grain yield and lower N fertilizer input suitable for a sustainable agriculture that is resilient against climate change.

image.png

The schematic diagram of the mechanism by which OsNRT2.3 regulates NUE and yield at nighttime high temperature.


 摘 要 

气候变化负调控作物的产量,阻碍了实现农业可持续性和食物安全的进程。本文中,作者发现一个硝酸盐转运蛋白编码基因OsNRT2.3对于高温条件下,维持水稻高产和高氮利用效率是必须的。作者发现,含有HTNE-2等位基因的水稻材料之所有具有对高温的耐受性,是因为OsNRT2.3b mRNA剪切体异构体的翻译增强以及来自OsNRT2.3基因5′-UTR的小RNA sNRT2.3-1的丰度减少。sNRT2.3-1可以以一种温度依赖性的方式,结合OsNRT2.3a基因的mRNA。本文的发现揭示了OsNRT2.3基因的5′-UTR等位基因变异导致高温条件下OsNRT2.3b蛋白水平的增加以及水稻的高产。同时,本文的研究结果还为创制具有更高产量和更低氮肥消耗的水稻新品种提供了一个育种策略,适合未来气候变化下的可持续农业的实现。

image.png

The simple structure diagram of two OsNRT2.3 alternative spliced proteins, OsNRT2.3a and OsNRT2.3b, under high nighttime.




** 范晓荣 **


个人简介:

1995-1999年,南京农业大学,学士;

1999-2002年,南京农业大学,硕士;

2002-2005年,南京农业大学,博士;

2005-2009年,南京农业大学,讲师;

2009-2014年,南京农业大学,副教授;

2014年-至今,南京农业大学,教授。


研究方向:主要从事水稻氮素营养的生理学,分子生物学与氮高效水稻分子育种研究工作。



doi: https://doi.org/10.1126/sciadv.adc9785


Journal: Science Advances

Published date: November 23, 2022


Cite:
Yong Zhang, Hisae Tateishi-Karimata, Tamaki Endoh, Qiongli Jin, Kexin Li, Xiaoru Fan, Yingjun Ma, Limin Gao, Haiyan Lu, Zhiye Wang, Art E. Cho, Xuefeng Yao, Chunming Liu, Naoki Sugimoto, Shiwei Guo, Xiangdong Fu, Qirong Shen, Guohua Xu, Luis Rafael Herrera-Estrella, Xiaorong Fan. High-temperature adaptation of an OsNRT2.3 allele is thermoregulated by small RNAs. Science Advances, 2022, 8(47): eadc9785. DOI: 10.1126/sciadv.adc9785




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