Zinc Oxide Nanoparticles Foliar Application Effectively Enhanced Zinc and Aroma Content in Rice (Oryza sativa L.) Grains

Rice

Research

Xijun Yuan¹  Yanju Yang¹  Haipeng Zhang¹  Kailiang Mi¹  Xinyan Shi¹  Rui Wang¹  Jialing Pu¹  Jie Chen¹  Hongcheng Zhang¹ 

[1] Innovation Center of Rice Cultivation Technology in Yangtze Valley, Ministry of Agriculture/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Research Institute of Rice Industrial Engineering Technology, Yangzhou University, 225009, Yangzhou, China;

关键词: Zinc oxide nanoparticles;    Foliar spraying;    Zinc nutrition;    Rice fragrance;    Proline oxidase;    2-Acetyl-1-pyrroline;   

DOI  :  10.1186/s12284-023-00653-0

 received in 2023-05-27, accepted in 2023-08-11,  发布年份 2023

来源: Springer

【 摘 要 】

The search for an effective zinc fertilizer and its application method to effectively increase zinc content and enhance aroma in rice grains is a crucial objective. In this study, a 2-year field plot experiment was conducted to investigate the influence of ZnO NPs foliar spraying on rice quality, grain zinc and aroma content, along with exploring the physiological mechanisms underlying these effects. Our results demonstrated that the rice breakdown value and taste value of foliar spraying zinc oxide nanoparticles were improved by 31.0–41.7% and 8.2–13.0% compared with CK (control treatment involved spraying water), improving the tasting and steaming quality of rice. While Fe and Cu content in grains decreased for the application of zinc oxide nanoparticles, zinc oxide nanoparticles foliar spraying significantly increased the zinc content and accumulation of grains by 33.6–65.1% and 37.8–74.7%, respectively. Further analysis showed that the sprayed zinc oxide nanoparticles achieved effective enrichment of zinc in edible parts and increased the final bioavailability of Zn. In addition, foliar spraying of zinc oxide nanoparticles significantly increased activities of nitrate reductase and glutamine synthetase in leaves, which elevated nitrogen content in leaves and grains, and ultimately enhanced 2-acetyl-1-pyrroline (2-AP) content in grains at maturity by 6.1–21.4% compared to CK. Our findings indicated that zinc oxide nanoparticles can be practically applied as a foliar fertilizer at the gestation for quality improvement, zinc enrichment and aroma enhancement of rice grains.

【 授权许可】

CC BY   
© Springer Science+Business Media, LLC, part of Springer Nature 2023

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