Foliar application of nano zero-valent iron improves the fruit quality of ‘Yanfu No.6’ apple

作者：Yang Lu, Yongjuan Cheng, Guanquecailang Lan, Guoping Liang, Zhiyuan Bian, Zonghuan Ma, Juan Mao, Baihong Chen · 发表于：BMC Plant Biology · 年份：2025 · DOI：10.1186/s12870-025-06168-8 · 被引用次数：8 · 研究领域：Plant Micronutrient Interactions and Effects、Environmental remediation with nanomaterials、Plant Stress Responses and Tolerance

BACKGROUND: In recent years, the apple industry in Jingning County has developed rapidly. However, due to the neglect of the importance of trace elements in apple cultivation, iron chlorosis often occurs in fruit trees, affecting the growth of the industry. This study investigates the effects of different concentrations of nano-zero-valent iron (nZVI) on apple tree growth and fruit aims to provide theoretical references for determining the optimal nZVI concentration to improve the quality of Jingning apples. RESULTS: This study systematically analyzed the effects of different concentrations of nanoscale zero-valent iron (nZVI) on the growth and fruit quality of 'Yanfu No.6' apple trees. The experimental results showed that compared with the control group (CK), the T2 treatment group at a concentration of 10 mg L⁻¹ significantly promoted the growth of apple tree shoots, as evidenced by an increase of about 15% in shoot length and a 10% increase in base diameter (p < 0.05). At the same time, this concentration treatment significantly improved the photosynthesis rate, SPAD value, and enzyme activities of apple leaves, including peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT), and the enhancement effect remained stable at multiple time points. Furthermore, the T2 treatment at a concentration of 10 mg L⁻¹ significantly improved the appearance quality and intrinsic quality of apple fruit, specifically by increasing fruit weight, achieving a coordinated ratio of fru...