NDLI: Evaluation of rice root oxidizing potential using digital image analysis

Content Provider	Springer Nature Link
Author	Kim, Gil Won Khan, Muhammad Israr Atulba, Sarah Louise Kim, Sang Yoon Lee, Yong Bok Kim, Pil Joo Gutierrez, Jessie
Copyright Year	2015
Abstract	The aerenchymal transport of oxygen to rice roots has significantly influenced the anaerobic root zone of flooded paddy soils. Therefore, the visualization of redox dynamics may be useful to characterize rice root oxidation potentials and the dynamics of redox-influenced ions in the root zone of paddy soils. In order to investigate the interaction between root oxidation potential and Fe uptake of (a) six different rice cultivars (Oryza sativa L.; Chuchung, Dongjin, Ilmi, Junam, Nampyeong, and Samkwang) were monitored in a flooded paddy soil with the aid of rhizotron experiment throughout the vegetation period, (b) digital images of the root zone were taken at the important growing stages, and (c) rice Fe uptake was characterized simultaneously. The images were processed by image analysis to display the reduction and oxidation areas in the root zones, and the distinct areas which were colorized due to varying soil redox changes were localized and quantified. Oxidized areas were mainly observed in the surrounding active roots and in a distinct layer on the soil surface. The selected rice cultivars have shown significantly different root-oxidized areas at the same rice growing stage. Root-oxidized area was significantly and positively correlated with total Fe content of rice root, but negatively correlated with the inner root Fe content. Rice cultivars having higher root oxidation potential precipitated more Fe on the outer root surface in the form of Fe plaques. In conclusion, digital image analysis is an effective tool for evaluating the oxidizing potential of rice root under anaerobic soil condition.
Starting Page	463
Ending Page	471
Page Count	9
File Format	PDF
ISSN	17382203
Journal	Journal of the Korean Society for Applied Biological Chemistry
Volume Number	58
Issue Number	3
e-ISSN	2234344X
Language	English
Publisher	The Korean Society for Applied Biological Chemistry
Publisher Date	2015-03-27
Publisher Place	Seoul
Access Restriction	Subscribed
Subject Keyword	Rhizosphere Digital image analysis Fe uptake Applied Microbiology Root-oxidized area Biological Techniques Paddy soil Bioorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry, Genetics and Molecular Biology

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