当前位置:首页>南京>Nature子刊 | 南京农业大学杰青 韦中教授 植物铁营养的"第三策略":微生物铁载体的直接吸收机制与农业应用

Nature子刊 | 南京农业大学杰青 韦中教授 植物铁营养的"第三策略":微生物铁载体的直接吸收机制与农业应用

  • 2026-03-17 19:38:36
Nature子刊 | 南京农业大学杰青 韦中教授 植物铁营养的"第三策略":微生物铁载体的直接吸收机制与农业应用

01

基本信息

•标题:Integrating microbial siderophores into concepts of plant iron nutrition

中文标题:将微生物铁载体纳入植物铁营养概念

•期刊:Nature Plants

•影响因子:13.6

•在线发表时间:2025年12月15日

•作者:Shaohua Gu;Nanqi Wang;Yiran Zheng;Tianqi Wang;Qirong Shen;Fusuo Zhang;Rolf Kümmerli;Zhong Wei;Yuanmei Zuo

•主要单位:中国农业大学等

关键词:plant iron nutrition, microbial siderophores, iron acquisition strategies, Strategy III, biofortification

•doi:https://doi.org/10.1038/s41477-025-02171-x 

02

文章概述

本文探讨植物铁吸收机制的复杂性,挑战传统的策略I(还原基)和策略II(植物铁载体基)二分法,提出混合策略的存在。重点强调微生物铁载体的关键作用,提出策略III(植物直接吸收微生物铁载体-铁复合物),并讨论其潜在农业应用价值,为作物铁生物强化和改善人类健康提供新思路。

03

研究背景

铁是植物必需微量元素,土壤中铁有效性低导致植物缺铁,影响生长及作物品质,进而引发人类“隐性饥饿”(如贫血)。传统观点认为植物通过策略I(双子叶和非禾本科单子叶植物的还原机制)和策略II(禾本科植物的植物铁载体机制)吸收铁,但近年研究发现两者界限模糊,存在混合策略。同时,微生物铁载体对植物铁营养的作用被忽视,其如何被植物利用的机制尚不明确,需整合微生物铁载体重新构建植物铁营养概念。

04

研究思路

  • 提出研究问题:传统植物铁吸收策略二分法是否适用于所有植物?微生物铁载体在植物铁营养中扮演何种角色?

  • 构建研究框架:回顾策略I和II机制,分析混合策略证据,探讨微生物铁载体作用,提出策略III概念。

  • 选择研究方法:通过文献综述整合生理、分子生物学及生态学证据,结合案例分析(如水稻、花生与玉米间作)。

  • 文献综述与理论推演评估微生物铁载体浓度、植物吸收途径(还原、配体交换、直接吸收)及相关 transporter功能。

  • 得出结论:提出策略III(直接吸收微生物铁载体-铁复合物),强调其农业应用潜力。

05

研究结果

  • 植物铁吸收策略并非严格二分,部分物种存在混合策略(如水稻兼具策略I和II特征,花生间作时吸收玉米植物铁载体)。

  • 微生物铁载体在根际浓度较高(12.5–50 μmol/l),可满足植物铁需求,且植物能通过根系分泌物富集产铁载体微生物。

  • 植物利用微生物铁载体的机制包括:策略I还原低稳定性复合物、策略II配体交换、直接吸收(策略III),后者涉及YS1/YSL转运蛋白、未知跨膜转运蛋白及胞吞作用。

06

结论不足与展望

  • 研究结论:植物铁吸收机制复杂,存在混合策略;微生物铁载体通过间接(策略I/II)和直接(策略III)途径被植物利用,策略III(直接吸收微生物铁载体-铁复合物)是未被充分认识的重要机制,为农业铁生物强化提供新靶点。

  • 研究的创新性:首次提出策略III概念,明确微生物铁载体直接吸收机制;挑战传统策略二分法,强调混合策略的普遍性;整合微生物生态学与植物营养学,为铁营养研究提供新框架。

  • 研究的不足之处:策略III的分子机制(如具体转运蛋白、胞吞路径)尚未明确;微生物铁载体与植物互作的生态风险(如过度螯合影响生态系统铁循环)需评估;多数微生物铁载体的植物吸收效果未验证(仅测试<2%已知种类)。

  • 研究展望:需通过基因编辑(如CRISPR-Cas突变体)、异源表达系统鉴定策略III相关转运蛋白;利用化学 proteomics 和共聚焦显微镜解析直接吸收机制;筛选高效产铁载体微生物,评估其在农业中的应用潜力;研究植物如何通过根系分泌物调控根际微生物群落以优化铁吸收。

  • 研究意义:丰富植物铁营养理论,为解决全球“隐性饥饿”提供新途径;推动微生物-植物互作研究,助力可持续农业发展;为作物铁生物强化提供理论基础,有望通过调控根际微生物提高作物铁含量,改善人类健康。

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  1. CONNECT:[ UseTime:0.001072s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001379s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000715s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000691s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001377s ]
  6. SELECT * FROM `set` [ RunTime:0.000630s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001605s ]
  8. SELECT * FROM `article` WHERE `id` = 503489 LIMIT 1 [ RunTime:0.001180s ]
  9. UPDATE `article` SET `lasttime` = 1775727700 WHERE `id` = 503489 [ RunTime:0.041366s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.008625s ]
  11. SELECT * FROM `article` WHERE `id` < 503489 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002890s ]
  12. SELECT * FROM `article` WHERE `id` > 503489 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001179s ]
  13. SELECT * FROM `article` WHERE `id` < 503489 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003476s ]
  14. SELECT * FROM `article` WHERE `id` < 503489 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001969s ]
  15. SELECT * FROM `article` WHERE `id` < 503489 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004402s ]
0.268637s