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Insights of Improved Aroma under Additional Nitrogen Application at Booting Stage in Fragrant Rice

文献类型： 外文期刊

作者： Bao, Gegen 1 ; Huang, Suihua 2 ; Ashraf, Umair 3 ; Qiao, Jingxuan 1 ; Zheng, Axiang 4 ; Zhou, Qi 1 ; Li, Lin 1 ; Wan, Xiaorong 1 ;

作者机构： 1.Zhongkai Univ Agr & Engn, Innovat Inst Modern Seed Ind, Guangzhou Key Lab Res & Dev Crop Germplasm Resourc, Guangzhou 510225, Peoples R China

2.Guangdong Acad Agr Sci, Inst Qual Stand & Monitoring Technol Agroprod, Guangzhou 510640, Peoples R China

3.Univ Educ Lahore, Dept Bot, Div Sci & Technol, Lahore 54770, Pakistan

4.China Agr Univ, Coll Agron & Biotechnol, Beijing 100083, Peoples R China

关键词： fragrant rice; 2-acetyl-1-pyrroline; nitrogen

期刊名称：GENES （ 影响因子：4.141； 五年影响因子：4.474 ）

ISSN：

年卷期： 2022 年 13 卷 11 期

页码：

收录情况： SCI

摘要： Plant mineral nutrition substantially affects the growth, yield and quality of rice, whereas nitrogen (N) application contributes significantly in this regard. Undoubtedly, N application improves rice aroma biosynthesis; however, the molecular mechanism underlying the regulation of grain 2-acetyl-1-pyrroline (2-AP) biosynthesis in the presence of nitrogen application at the booting stage has remained largely unexplored. The present study examined the effects of three N levels, i.e., 0 g per pot (N0), 0.43 g per pot (N1) and 0.86 g per pot (N2) on intermediates, enzymes and genes involved in 2-AP biosynthesis, as well as on the yield of two fragrant rice cultivars viz, Meixiangzhan2 and Xiangyaxiangzhan. N was additionally applied at the booting stage. The results depicted that the levels of precursor, such as proline, and the activity of enzymes involved in 2-AP biosynthesis, such as Delta 1-pyrroline-5-carboxylate synthetase (P5CS) and diamine oxidase (DAO), and P5CS1 gene expression were comparatively higher under N1 than N0 in both fragrant rice cultivars. Moreover, the N2 treatment increased the grain panicle(-1), filled grain percentage and grain yield of both rice cultivars, while the grain yield of Meixiangzhan2 and Xiangyaxiangzhan was increased by 15.87% and 12.09%, respectively, under N2 compared to N1 treatment. Hence, 0.43 g per pot of N showed positive performances in yield and aroma accumulation in fragrant rice and should be further employed in the practice and production for better cultivation in the rice market.

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