Root Exudates of Paddy

Andal, R; Krishnan, Bhuvaneswari; Subba-Rao, N. S.

doi:10.1038/1781063a0

Cited by 40 publications

(9 citation statements)

References 3 publications

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“…2). As rice plants supply organic materials to the rhizosphere in the form of exudates and slough-off of root (Andal et al 1956;MacRae and Castro 1967;Kimura et al 1977) and they are considered to contribute to the increase of the TOC content, this finding suggested the immediate decomposition in the rhizosphere. Some portion may have been metabolized to methane and contributed to the drastic increase in the methane fluxes of the planted plot to the atmosphere, as suggested by Sass et al (1990).…”

Section: Chemical Fertilizer Plots (Cf-plots)mentioning

confidence: 94%

Methane production and its fate in paddy fields

Murase

Kimura

Kuwatsuka

1993

Soil Science and Plant Nutrition

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Section: Chemical Fertilizer Plots (Cf-plots)mentioning

confidence: 94%

Methane production and its fate in paddy fields

Murase

Kimura

Kuwatsuka

1993

Soil Science and Plant Nutrition

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“…Using the same Norin varieties (N 22, N 29, N 32, N 36, N 37) MacRae and Castro (1967) have shown Akagare resistance to correlate with the carhohydrate content of the root exudates and also with the number of amino acids present in the exudates. MacRae and Castro point out that a comparison may be drawn with varietal resistance to foot-rot caused by Fusarium moniliforme where a greater number of amino acids in the root exudates occurred in the varieties resistant to the disease (Andal et al 1956).…”

Section: Introductionmentioning

confidence: 99%

Rhizosphere Oxidation in Rice: An Analysis of Intervarietal Differences in Oxygen Flux from the Roots

Armstrong

1969

Physiologia Plantarum

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The polarographic technique (Armstrong 1967) has been found suitable for the detection of significant intervarietal differences in oxygen diffusion from rice roots. All the evidence obtained supports the thesis that intervarietal differences in oxygen diffusion rate occur and the varieties tested may be arranged in order of increasing oxygen flux as follows N 36 < N 22 < N 29 < N 32 < Yubae. The lowest oxygen flux rates are found in those varieties (N 22 and N 36) susceptible to Akagare disease of rice while the flux rates of varieties resistant to Akagare (N 29 and N 32) are higher. On the basis of these results one would also expect Yubae to be resistant to Akagare. The results are discussed with reference to previous work which has shown the oxidising activity and carbohydrate exudation properties of rice roots to be similarly correlated with resistance or susceptibility to Akagare. Attention is drawn to what it is felt are the shortcomings in existing techniques for measuring the oxidising activity of roots. It is suggested that with certain provisions the polarographic technique may he found useful in any effort to build up high oxidising power into the new plant type proposed for the tropics.

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“…Wetland rice field soil has distinct biogeochemical cycles and microbial communities from upland soils (Conrad and Frenzel 2002;Kirk 2004), and rice roots growing in a submerged soil give the specific habitat for microorganisms through supply of oxygen and organic matter to the rhizosphere depending on the growth stage (Gotō & Tai, 1956;Andal et al 1956). The rice roots in the early growth-stage release oxygen to the surrounding soil making the rhizosphere oxic (Gotō and Tai 1956;Joshi et al 1973).…”

Section: Introductionmentioning

confidence: 99%

Community structure of microeukaryotes in a rice rhizosphere revealed by DNA-based PCR-DGGE

Asiloglu

Honjo²,

Saka³

et al. 2015

Soil Science and Plant Nutrition

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Rice roots provide a specific habitat for microorganisms in the rhizosphere of a submerged field through supply of oxygen and organic matter. Many studies have focused on the microbial community in the rice rhizosphere, but less is still known about the microeukaryotic community structure of rice rhizosphere. This study explored the microeukaryotic community structure of a rice rhizosphere through denaturing gradient gel electrophoresis (DGGE) targeting 18S rRNA gene. The rice roots and the rhizosphere soil samples, which were collected from a field under rice-wheat rotation system, were separately analyzed. To characterize the rice rhizosphere-specific community, the bulk soil of rice field and the wheat rhizosphere samples were also examined. DGGE fingerprints showed that the microeukaryotic community of rice roots were distinct from the community of the bulk soil and showed a temporal shift with the growth stage. The rhizosphere soil community was distinct from the root and bulk soil communities, but this could be explained by that the root and bulk soil communities were shared in the rhizosphere. The rice rhizosphere community was also distinct from those in the wheat rhizosphere. Microeukaryotes that characterized the rice rhizosphere (roots and the rhizosphere soil) community could be affiliated to Polymyxa, flagellates, and oomycetes, which suggested that microeukaryotes with various ecological roles, e.g., parasites, bacterial grazers, and decomposers, inhabit the rice rhizosphere. The results showed that the rice root and its growth stages are key factors shaping the microeukaryotic community structure in the rhizosphere.

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Root Exudates of Paddy

Cited by 40 publications

References 3 publications

Methane production and its fate in paddy fields

Methane production and its fate in paddy fields

Rhizosphere Oxidation in Rice: An Analysis of Intervarietal Differences in Oxygen Flux from the Roots

Community structure of microeukaryotes in a rice rhizosphere revealed by DNA-based PCR-DGGE

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