气候变化领域集成服务门户(CCPortal): Unravelling the interplay of different traits and parameters related to nitrogen use efficiency in wheat for climate-resilient agriculture

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DOI	10.1111/jac.12696
	Unravelling the interplay of different traits and parameters related to nitrogen use efficiency in wheat for climate-resilient agriculture
	Gayatri; Mandal, Puja; Venkatesh, Karnam; Mandal, Pranab Kumar
发表日期	2024
ISSN	0931-2250
EISSN	1439-037X
起始页码	210
结束页码	2
卷号	210 期号:2
英文摘要	Enhancing Nitrogen Use Efficiency (NUE) is extremely important towards mitigating climate change, especially in wheat where the NUE is less than 50%. Hence, optimizing grain yield under reduced application of nitrogenous fertilizer is a significant challenge. To address this challenge, a comprehensive study was conducted to investigate various agronomic traits and morphological, biochemical and molecular parameters related to NUE. This study explored their interrelationships and effects on grain yield, providing novel insights that were not previously reported. A set of 278 diverse wheat genotypes were assessed, encompassing eight NUE-related field traits. All traits' values were reduced under stressed N (ranging from 7.5% to 77.5%) except Nitrogen Utilization Efficiency (NUtE) and NUE. Data analysis showed a significant positive correlation between grain yield and all other NUE-related traits (r2 value ranged from .23 to 1.00), highlighting their relevance in comprehending the biological NUE of wheat plants. Principal component analysis (PCA) also revealed that N at head and N at harvest were more connected with gain yield, NUE and biomass under the optimum N condition, but less connected with gain yield and NUE under the stressed N condition. To complement the field data, representative genotypes were further subjected to a hydroponics experiment under absolute N control to study the different morphological parameters, photosynthetic pigments and the performance of essential N- and C-metabolizing enzymes at the seedling stage. N stress had a detrimental impact on the majority of the parameters (-0.84% to -79.8%). Nitrite reductase (NiR), glutamate dehydrogenase (GDH) and isocitrate dehydrogenase (ICDH) enzymes as well as root length (RL), root fresh weight (RFW) and CS transcript, were positively affected by 5.9%-35.6%. The correlation analysis highlighted the substantial influence of four key N-metabolizing enzymes, namely nitrate reductase (NR), glutamine synthetase (GS), glutamate oxo-glutarate aminotransferase (GOGAT), and GDH on grain yield. Additionally, this study highlighted the direct and indirect associations between seedling parameters and field traits, where shoot and root length were found to be most significant for N acquisition, especially under N stress. In conclusion, these findings offer valuable insights into the intricate network of traits and parameters influencing wheat grain yield under varying N regimes.
英文关键词	carbon-metabolizing enzymes; nitrogen-metabolizing enzymes; nitrogen stress; NUE-related traits; wheat
语种	英语
WOS研究方向	Agriculture
WOS类目	Agronomy
WOS记录号	WOS:001166501500001
来源期刊	JOURNAL OF AGRONOMY AND CROP SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305995
作者单位	Indian Council of Agricultural Research (ICAR); ICAR - National Institute For Plant Biotechnology (NIPB); Tamil Nadu Agricultural University; Indian Council of Agricultural Research (ICAR); ICAR - Indian Institute of Millets Research
推荐引用方式 GB/T 7714	Gayatri,Mandal, Puja,Venkatesh, Karnam,et al. Unravelling the interplay of different traits and parameters related to nitrogen use efficiency in wheat for climate-resilient agriculture[J],2024,210(2).
APA	Gayatri,Mandal, Puja,Venkatesh, Karnam,&Mandal, Pranab Kumar.(2024).Unravelling the interplay of different traits and parameters related to nitrogen use efficiency in wheat for climate-resilient agriculture.JOURNAL OF AGRONOMY AND CROP SCIENCE,210(2).
MLA	Gayatri,et al."Unravelling the interplay of different traits and parameters related to nitrogen use efficiency in wheat for climate-resilient agriculture".JOURNAL OF AGRONOMY AND CROP SCIENCE 210.2(2024).