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江苏省农业科学院植保所科研团队在国际期刊(IF=12.6)发表科研成果

  • 2026-06-21 06:26:27
江苏省农业科学院植保所科研团队在国际期刊(IF=12.6)发表科研成果

Reactive oxygen species (ROS)-responsive delivery of chlorantraniliprole by a nanoscale metal-phenolic network for systemic control of rice striped stem borer文章发表在《Journal of Nanobiotechnology》。本研究依托金属酚网络(MPN)构建活性氧(ROS)响应型氯虫苯甲酰胺纳米递送体系CAP@TF-PEG,成功解决了传统农药靶向性差、持效期短、生态风险高等问题。该纳米制剂可精准防控水稻二化螟,同时兼具生物安全性、环境友好性,还能促进水稻根系生长,实现病虫防治与作物提质兼顾,为绿色智能纳米农药的研发与应用提供了可行方案。

研究背景

水稻二化螟是水稻主产区重大害虫,幼虫钻蛀茎秆的取食方式,让常规叶面喷施农药难以抵达作用靶标,严重威胁水稻产量与粮食安全。当前防治主力药剂氯虫苯甲酰胺的传统剂型存在物理稳定性差、植株内吸转运能力弱等缺陷,需多次高浓度施药,进而引发农药残留、害虫抗药性、虫害再猖獗等3R”生态问题。研究发现,水稻遭受虫害、组织受损时会爆发ROS,而金属酚网络拥有动态配位结构与刺激响应特性。基于植物-害虫互作的ROS信号机制,开发ROS响应型智能纳米农药,成为突破传统农药应用瓶颈的重要方向。

主要研究结果

研究以单宁酸-三价铁金属酚网络为载体包覆氯虫苯甲酰胺,外层修饰聚乙二醇与牛血清白蛋白,制备得到CAP@TF-PEG纳米颗粒。材料表征证实其粒径均一,大幅改善药液在疏水水稻叶片上的润湿性与附着能力;体外释药实验表明,该体系在正常环境下药物泄漏量极低,仅在高ROS环境中瓦解外壳、定向释放有效成分,具备优异的ROS响应释药特性。

借助荧光标记、PET-CT活体示踪技术证实,CAP@TF-PEG可通过水稻韧皮部完成体内转运,并在虫害、植株损伤部位靶向富集。室内毒力试验显示,该制剂速效毒性略低于传统剂型,但杀虫持效性显著提升;田间试验证明其对水稻二化螟综合防效优异,可有效减少水稻白穗与田间虫口数量。转录组分析表明,纳米载体可协同抑制害虫表皮合成,干扰其解毒与代谢通路,强化杀虫效果。

生物安全评价结果显示,CAP@TF-PEG对斑马鱼、哺乳动物细胞的毒性远低于原药,且不会改变土壤微生物群落结构与功能,生态安全性良好。此外,该纳米载体可上调水稻生长素相关基因表达,提升内源生长素含量,显著促进水稻根系生长。

研究总结

该研究打造的多功能智能纳米农药,融合了靶向释药、长效防虫、生态安全、作物促生四大优势,弥补了传统化学农药的诸多短板,契合现代农业绿色可持续发展理念,拥有较高的田间推广价值与商业化潜力。

原文链接:

https://doi.org/10.1186/s12951-026-04666-x

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  1. CONNECT:[ UseTime:0.000438s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000650s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.003422s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000310s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000685s ]
  6. SELECT * FROM `set` [ RunTime:0.000312s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000718s ]
  8. SELECT * FROM `article` WHERE `id` = 549951 LIMIT 1 [ RunTime:0.002659s ]
  9. UPDATE `article` SET `lasttime` = 1782427705 WHERE `id` = 549951 [ RunTime:0.000582s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.002210s ]
  11. SELECT * FROM `article` WHERE `id` < 549951 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.003841s ]
  12. SELECT * FROM `article` WHERE `id` > 549951 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000501s ]
  13. SELECT * FROM `article` WHERE `id` < 549951 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.057941s ]
  14. SELECT * FROM `article` WHERE `id` < 549951 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.038461s ]
  15. SELECT * FROM `article` WHERE `id` < 549951 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.024285s ]
0.220679s