Identification and role of organic acids in watermelon root exudates for recruiting Paenibacillus polymyxa SQR-21 in the rhizosphere

Ling, Ning; Raza, Waseem; Ma, Jie; Huang, Qiwei

doi:10.1016/j.ejsobi.2011.08.009

Cited by 144 publications

(77 citation statements)

References 27 publications

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“…Biocontrol with isolated antagonistic microorganisms as a similar method to BSD is a focal point of research in the control of soil-borne diseases (Ling et al 2011a;Chen et al 2010). It is based on the applications of aerobic antagonistic microbes in the soil, such as Trichoderma spp., Bacillus spp.…”

Section: Discussionmentioning

confidence: 99%

Toxic organic acids produced in biological soil disinfestation mainly caused the suppression of Fusarium oxysporum f. sp. cubense

et al. 2014

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Biological soil disinfestation (BSD) is an effective and environmentally friendly way to suppress soil-borne pathogens. Although it is increasingly used in USA, the Netherlands and Japan, its precise mechanism has not been well quantified so far. Quantitative real-time PCR, denaturing gradient gel electrophoresis and high performance liquid chromatography were used for investigating the role of organic acids in the mechanisms of BSD. The results showed that BSD significantly reduced the population of Fusarium oxysporum in soil. Simultaneously, in BSD treatments, the soil pH significantly decreased and some organic acid producers, such as Clostridia sp., were observed. Four kinds of toxic organic acids to F. oxysporum were detected in soil solutions of BSD treatments. Acetic acid and butyric acid were the primary organic acids, followed by small amounts of isovaleric acid and propionic acid. The verification test directly demonstrated that the toxic organic acids with the maximal doses detected in BSD significantly suppressed F. oxysporum, Rhizoctonia solani and Ralstonia solanacearum.

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Section: Discussionmentioning

confidence: 99%

Toxic organic acids produced in biological soil disinfestation mainly caused the suppression of Fusarium oxysporum f. sp. cubense

et al. 2014

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“…Zhang et al (2007) found that the REs of apple seedlings mainly contained organic acids, glycol, esters, and phenol derivatives, peach REs contained phenolic acids and phenol derivatives in addition to two unidentified compounds, and REs of jujube did not contain any phenolic acids. Several organic acids in the REs of watermelon such as oxalic acid, malic acid, and citric acid were identified by Ling et al (2011). Citric acid is also contained in REs of S. triqueter in this study.…”

Section: Resultsmentioning

confidence: 78%

Identification of Scirpus triqueter root exudates and the effects of organic acids on desorption and bioavailability of pyrene and lead in co-contaminated wetland soils

Hou

Liu

Zhang

et al. 2015

Environ Sci Pollut Res

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Root exudates (REs) of Scirpus triqueter were extracted from the rhizosphere soil in this study. The components in the REs were identified by GC-MS. Many organic acids, such as hexadecanoic acid, pentadecanoic acid, vanillic acid, octadecanoic acid, citric acid, succinic acid, glutaric acid, and so on, were found. Batch simulated experiments were conducted to evaluate the impacts of different organic acids, such as citric acid, artificial root exudates (ARE), succinic acid, and glutaric acid in REs of S. triqueter on desorption of pyrene (PYR) and lead (Pb) in co-contaminated wetland soils. The desorption amount of PYR and Pb increased with the rise in concentrations of organic acids in the range of 0-50 g·L(-1), within shaking time of 2-24 h. The desorption effects of PYR and Pb in soils with various organic acids treatments decreased in the following order: citric acid > ARE > succinic acid > glutaric acid. The desorption rate of PYR and Pb was higher in co-contaminated soil than in single pollution soil. The impacts of organic acids in REs of S. triqueter on bioavailability of PYR and Pb suggested that organic acids enhanced the bioavailability of PYR and Pb in wetland soil, and the bioavailability effects of organic acids generally followed the same order as that of desorption effects.

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“…Root exudates are a complex blend of high and low molecular weight compounds, many of which can induce chemotactic response in PGPR (Bais, Broeckling, & Vivanco, 2008). In the abundant literature on the subject, small sugars, amino acids, aromatic compounds and small organic acids are suggested to be important drivers of bacterial attraction in the rhizosphere (Bashan & Holguin, 1994;De Weert et al, 2002;Heinrich & Hess, 1985;Ling, Raza, Ma, Huang, & Shen, 2011;Neal, Ahmad, Gordon-Weeks, & Ton, 2012;Oku, Komatsu, Tajima, Nakashimada, & Kato, 2012;Parales & Harwood, 2002;Reinhold, Hurek, & Fendrik, 1985;Rudrappa, Czymmek, Paré, & Bais, 2008;Van Bastelaere et al, 1999). PGPR encodes for many chemoreceptors, which suggest a wide diversity of attracting molecules.…”

Section: Introductionmentioning

confidence: 98%

Not Just Sweet Talkers

Beauregard

2015

Advances in Botanical Research

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Identification and role of organic acids in watermelon root exudates for recruiting Paenibacillus polymyxa SQR-21 in the rhizosphere

Cited by 144 publications

References 27 publications

Toxic organic acids produced in biological soil disinfestation mainly caused the suppression of Fusarium oxysporum f. sp. cubense

Toxic organic acids produced in biological soil disinfestation mainly caused the suppression of Fusarium oxysporum f. sp. cubense

Identification of Scirpus triqueter root exudates and the effects of organic acids on desorption and bioavailability of pyrene and lead in co-contaminated wetland soils

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