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中国科学院大学学报 ›› 2013, Vol. 30 ›› Issue (4): 485-496.DOI: 10.7523/j.issn.2095-6134.2013.04.009

• 环境科学与地理学 • 上一篇    下一篇

硫对苗期水稻根表胶膜形成的影响

吴丛杨慧1,2, 胡正义2, S. Haneklaus3, 樊建凌1, 章钢娅1, 徐柏森4, 夏旭1, 卢佳2, E. Schnug3   

  1. 1. 中国科学院南京土壤研究所, 土壤与农业可持续发展国家重点实验室, 南京 210008;
    2. 中国科学院大学资源与环境学院, 北京 100049;
    3. 联邦栽培植物研究中心(JKI) 作物与土壤科学研究所, 布伦瑞克 38116, 德国;
    4. 南京林业大学电镜实验室, 南京 210032
  • 收稿日期:2012-06-05 修回日期:2012-10-25 发布日期:2013-07-15
  • 通讯作者: 胡正义
  • 基金资助:

    Supported by National Natural Science Foundation of China (20577055, 31201689), Chinese Academy of Sciences-DAAD (German Academic Exchange Service) Joint Scholarship Programme Doctoral Research in Germany, and China Postdoctoral Science Foundation (20110490630) 

Influence of soil-applied sulfur on the formation of iron plaque on the root surface of rice (Oryza Sativa L.) seedlings

WU Cong-Yang-Hui1,2, HU Zheng-Yi2, Haneklaus Silvia3, FAN Jian-Ling1, ZHANG Gang-Ya1, XU Bai-Sen4, XIA Xu1, LU Jia2, Schnug Ewald3   

  1. 1. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
    2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Institute for Crop and Soil Science, Julius Kühn-Institut, Federal Research Centre for Cultivated Plants (JKI), Braunschweig 38116, German;
    4. Laboratory of Electron Microscope, Nanjing Forestry University, Nanjing 210032, China
  • Received:2012-06-05 Revised:2012-10-25 Published:2013-07-15

摘要:

通过土-砂根际盒培养试验研究了施硫(0, 30 mg·kg-1, SO42--S)对水稻苗期根表胶膜形成的影响. 结果表明,施硫显著提高ACA(乙酸钠-柠檬酸钠-抗坏血酸)浸提的24天和48天苗龄根表胶膜铁锰含量,即施硫促进水稻根表胶膜形成,但其对8天苗龄根表胶膜影响不明显. SEM-EDX观察发现,施硫导致水稻根表有更多颗粒状聚集,尤其在根的基部. 可见,硫可以通过调控水稻根表胶膜形成来影响根系对营养元素的吸收.

关键词: 硫, 胶膜, 水稻, ACA, SEM-EDX, 根际

Abstract:

Influence of soil-applied sulfur (S)(0, 30 mg·kg-1, SO42--S)on the formation of iron plaque in the root surface of rice seedlings (Oryza sativa L.) was investigated in a controlled soil-sand culture experiment. Application of S induced the formation of iron plaque in the root surface because the application of S increased significantly the ACA (ascorbic-citrate-acetic) extractable Fe and Mn contents in iron plaque on the root surface of 24- and 28-days-old rice seedlings, but the differences proved to be not significant on the root surface of 8-days-old rice seedlings. SEM-EDX image and analysis of iron plaque clearly revealed that differences of polymer particulate iron plaque deposition were the biggest between tip and top root segments in relation to the S treatment. The results provide the evidence that S is involved in the regulation of the uptake of other nutrients by the expression of iron plaque formation on the root surface of rice.

Key words: Sulfur, iron plaque, rice (Oryza sativa L.), ACA, SEM-EDX, rhizosphere

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