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

doi:10.7523/j.issn.2095-6134.2013.04.009

Abstract

Abstract:

Influence of soil-applied sulfur (S)(0, 30 mg·kg^-1, SO₄^2--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

CLC Number:

S511

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.

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