| 冯燕,李晓娜,曹雪松,王传洗,陈菲然,乐乐,王震宇.氧化铈纳米材料提升胡萝卜块根品质的机理研究[J].农业环境科学学报,2025,44(2):310-319. |
| 氧化铈纳米材料提升胡萝卜块根品质的机理研究 |
| Improving mechanism of carrot root tuber quality with cerium oxide nanomaterials |
| 投稿时间：2024-01-28 |
| DOI：10.11654/jaes.2024-0111 |
| 中文关键词: CeO2纳米材料 胡萝卜 产量 品质 代谢组 分子机制 |
| 英文关键词: CeO2 nanomaterials carrot yield quality metabolomics molecular mechanism |
| 基金项目:国家自然科学基金项目（42277225） |
| 作者 | 单位 | E-mail | | 冯燕 | 江南大学环境与生态学院, 环境过程与污染控制研究所, 江苏 无锡 214122 | | | 李晓娜 | 江南大学环境与生态学院, 环境过程与污染控制研究所, 江苏 无锡 214122 | | | 曹雪松 | 江南大学环境与生态学院, 环境过程与污染控制研究所, 江苏 无锡 214122 | | | 王传洗 | 江南大学环境与生态学院, 环境过程与污染控制研究所, 江苏 无锡 214122 | | | 陈菲然 | 江南大学环境与生态学院, 环境过程与污染控制研究所, 江苏 无锡 214122 | | | 乐乐 | 江南大学环境与生态学院, 环境过程与污染控制研究所, 江苏 无锡 214122 | leyue@jiangnan.edu.cn | | 王震宇 | 江南大学环境与生态学院, 环境过程与污染控制研究所, 江苏 无锡 214122 | |
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| 中文摘要: |
| 本试验通过4 d连续土壤施用100 mL不同浓度（1、10、50 mg·L-1）氧化铈纳米材料（Cerium oxide nanomaterials，CeO2 NMs），探究其对胡萝卜生长、产量和品质的影响及作用机制。结果表明，在施用1、10、50 mg·L-1 CeO2 NMs的处理中，促生增产的最佳处理浓度为50 mg·L-1，且该浓度的CeO2 NMs能被胡萝卜幼苗根系有效吸收并迁移至叶片。50 mg·L-1 CeO2 NMs处理下，叶片中铈颗粒的数量是对照组（不添加CeO2 NMs）的20.7倍，通过促进叶片中光合产物的合成优化了叶片-块根的养分分配；通过上调β-胡萝卜素合成相关基因—PSY、ZDS和LCYB的表达（上调幅度为105.9%、95.1%和68.9%）、增加激素含量（ABA和IAA分别增加了76.1%和15.8%），改善了胡萝卜块根的形成和分化。成熟期收获后，CeO2NMs处理后的胡萝卜块根中营养元素，如磷、硫、锰、铁和锌等的含量相较于对照处理组显著上调了15.1%~101.1%；β-胡萝卜素、可溶性糖和抗坏血酸分别是对照处理组的2.4、1.5倍和1.8倍；此外，CeO2 NMs通过提高块根中氨基酸和糖类等物质含量，改变色氨酸、苯丙氨酸生物合成和代谢等途径通路，调节了碳和氮的同化，进而影响了养分分配，最终改善了胡萝卜块根的品质。同时发现，胡萝卜块根中铈颗粒数量和铈元素含量分别是对照组的11.0倍和2.9倍，其潜在的环境健康风险仍需进一步探究。 |
| 英文摘要: |
| This study investigated the effects and mechanisms of 100 mL of CeO2 nanomaterials（NMs）on carrot growth, yield, and quality by applying different concentrations（1, 10, 50 mg·L-1）to soil for 4 d. The results showed that after the application of 1, 10, 50 mg·L-1 CeO2 NMs, the optimal concentration of CeO2 NMs for promoting growth and yield increase was observed to be 50 mg·L-1, which could be effectively absorbed by the roots of carrot seedlings and transferred to the leaves. The leaves of the treatment group contained 20.7 times more Ce particles than those of the control group, and the nutrient distribution between leaves and root tubers was optimized by promoting the synthesis of photosynthetic products in the leaves. Meanwhile, the formation and differentiation of carrot root tubers were improved by up-regulating the expression of β-carotene synthesis-related genes（PSY, ZDS, and LCYB up-regulated by 105.9%, 95.1%, and 68.9%） and increasing the content of hormones（ABA and IAA increased by 76.1% and 15.8%, respectively）. After harvesting at the mature stage, the contents of nutrients such as phosphorus, sulfur, manganese, iron, and zinc were significantly greater than in the control group, by 15.1%-101.1%; beta-carotene, soluble sugar, and ascorbic acid were 2.4, 1.5 times, and 1.8 times higher than those in the control group, respectively. In addition, by enhancing the amino acid and sugar contents and altering the biosynthesis and metabolism pathways of tryptophan and phenylalanine, carbon and nitrogen assimilation were regulated, thus affecting nutrient allocation and ultimately improving the quality of carrot root tubers. However, it should not be ignored that the carrot root tubers contained 11.0 and 2.9 times more Ce particles and Ce elements than those of the control group, respectively, and the potential environmental health risks require further investigation. |
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