Collection and analysis of root exudates of Festuca arundinacea L. and their role in facilitating the phytoremediation of petroleum-contaminated soil

Liu, Wuxing; Hou, Jinyu; Wang, Qingling; Yang, Huijuan; Luo, Yongming; Christie, Peter

doi:10.1007/s11104-014-2345-9

Cited by 61 publications

(21 citation statements)

References 41 publications

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“…In the long term, crude oil in the environment naturally degrades by physical, chemical, and biological processes (Barakat et al, 2001). This process is accelerated by plants (Ogbo et al, 2009), microorganisms (Abed et al, 2015), and their symbiosis in the rhizosphere (Newman and Reynolds, 2004; Grenier et al, 2015; Liu et al, 2015). However, in deserts a limited and unpredictable water supply and high temperature amplitudes result in low biomass production of plants and low activity of microorganisms (Noy‐Meir, 1973).…”

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confidence: 99%

Desert Vegetation Forty Years after an Oil Spill

et al. 2017

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Deserts are the most frequent locations of terrestrial crude oil contaminations. Nevertheless, the long-term effects of petroleum hydrocarbons on desert ecosystems are still unknown, which makes risk assessment and decision making concerning remediation difficult. This study examined the long-term effects of petroleum hydrocarbons on perennial desert vegetation. The study site was a hyper-arid area in the south of Israel, which was contaminated by a crude oil spill in 1975. The contaminated area was compared to uncontaminated reference areas. The composition of perennial plants 40 yr after the oil spill was not significantly affected by the contamination. However, the size distribution of the two most dominant shrub species, Baker and (Moq.) Iljin., and the only tree species, Savi and (Forssk.) Hayne, were different from the reference. These differences can be explained by decreased recruitment. The estimated recruitment of in the last 40 yr post oil spill was 74% less than recruitment in the reference area. Low recruitment of may in the future lead to the loss of tree cover, which would change the entire ecosystem, as are keystone species on which a number of microorganisms, plants, and animals rely. Remediation of oil spills and preventative measures are recommended.

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confidence: 99%

Desert Vegetation Forty Years after an Oil Spill

et al. 2017

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“…We used ethyl acetate to extract the rhizosphere soil secretions and then profiled them using gas chromatography-mass spectrometry (GC-MS) (TSQ 8000TM Evo Triple quadrupole GC-MS, Thermo Fisher Scientific Co., Ltd., Shanghai, China) (Carvalhais et al, 2015;Liu et al, 2015).…”

Section: Rhizosphere Secretionsmentioning

confidence: 99%

Effect of industrial crop Jerusalem artichoke on the micro-ecological rhizosphere environment in saline soil

Shao

Long

Gao

et al. 2021

Preprint

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Salinity is not only a threat to organisms and ecosystems, but also a major factor restricting the development of agricultural production. This study aimed to explore the modification effect of in-situ Jerusalem artichoke (genotype NY-1) cultivation on the rhizosphere micro-ecological environment in the saline-alkali region along the southeast coast of China. We analyzed the change of carbon and nitrogen in the saline soil from a microbial perspective, through the quantification of the area of root channels, rhizosphere secretions and soil microbiome (cbbL, cbbM and nifH). The root channels of NY-1 not only improved the physical structure of saline soil, but also provided a living space for microorganisms, afforded basic conditions for the optimization of the soil micro-ecological environment. In addition, rhizosphere secretions (from roots of NY-1 as well as microorganisms), such as carbohydrates, hydrocarbons, acids, etc., could be considered as a way to improve the saline-alkali soil habitat. NY-1 increased the diversity and abundance of autotrophic and nitrogen-fixing bacteria in saline soil (rhizosphere > bulk soils), which should be a biological way to increase the amount of carbon and nitrogen fixation in soil. Moreover, some of the detected genera (Sideroxydans, Thiobacillus, Sulfuritalea, Desulfuromonas, etc.) participate in the carbon and nitrogen cycles, and in the biogeochemical cycle of other elements. In short, Jerusalem artichoke can improve not only the physical and chemical properties of saline-alkali soil, but also promote material circulation and energy flow in the micro-ecological rhizosphere environment of saline soils.

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“…The mechanisms by which root exudates enhance degradation of organic pollutions involve the activation of microbial enzymatic pathways 22 , enhanced bioavailability of organic pollutions 23 – 25 , and increased abundance of degradation bacteria 15 , 26 . Nevertheless, the degradation of organic pollutants in the soil rhizosphere is attributed to the joint actions of root exudates and microorganisms 15 , 27 , 28 . However, how the components of root exudates affect microbial activity and, in turn, the biodegradation of organic pollutants remains unclear.…”

Section: Introductionmentioning

confidence: 99%

The role of artificial root exudate components in facilitating the degradation of pyrene in soil

Sun

Zhu

2017

Sci Rep

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Root exudates play an important role in the phytoremediation of soils contaminated by organic pollutants, but how root exudate components affect the remediation process is not well understood. In this study, we explored the effects and mechanisms of the major root exudates, including glucose, organic acids, and serine, in the rhizoremediation of pyrene-contaminated soil. The results showed that glucose increased the degradation of pyrene (54.3 ± 1.7%) most significantly compared to the organic acids (45.5 ± 2.5%) and serine (43.2 ± 0.1%). Glucose could significantly facilitate the removal of pyrene in soil through promoting dehydrogenase activity indicated by a positive correlation between the removal efficiency of pyrene and the soil dehydrogenase activity (p < 0.01). Furthermore, root exudates were able to change soil microbial community, particularly the bacterial taxonomic composition, thereby affecting the biodegradation of pyrene. Glucose could alter soil microbial community and enhance the amount of Mycobacterium markedly, which is dominant in the degradation of pyrene. These findings provide insights into the mechanisms by which root exudates enhance the degradation of organic contaminants and advance our understanding of the micro-processes involved in rhizoremediation.

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Collection and analysis of root exudates of Festuca arundinacea L. and their role in facilitating the phytoremediation of petroleum-contaminated soil

Cited by 61 publications

References 41 publications

Desert Vegetation Forty Years after an Oil Spill

Desert Vegetation Forty Years after an Oil Spill

Effect of industrial crop Jerusalem artichoke on the micro-ecological rhizosphere environment in saline soil

The role of artificial root exudate components in facilitating the degradation of pyrene in soil

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