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Influence of soil-applied sulfur on the formation of iron plaque on the root surface of rice (Oryza Sativa L.) seedlings
Received date: 2012-06-05
Revised date: 2012-10-25
Online published: 2013-07-15
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
WU Cong-Yang-Hui , HU Zheng-Yi , Haneklaus Silvia , FAN Jian-Ling , ZHANG Gang-Ya , XU Bai-Sen , XIA Xu , LU Jia , Schnug Ewald . Influence of soil-applied sulfur on the formation of iron plaque on the root surface of rice (Oryza Sativa L.) seedlings[J]. Journal of University of Chinese Academy of Sciences, 2013 , 30(4) : 485 -496 . DOI: 10.7523/j.issn.2095-6134.2013.04.009
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