Exposure of Cucurbita pepo to DDE-contamination alters the endophytic community: A cultivation dependent vs a cultivation independent approach

Eevers, Nele; Hawthorne, Joseph; White, Jason C.; Vangronsveld, Jaco; Weyens, Nele

doi:10.1016/j.envpol.2015.11.038

Cited by 30 publications

(15 citation statements)

References 31 publications

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“…Endophytic bacteria that reside inside plant tissues are also known to play a crucial role in the remediation of organic compounds. Plant-associated bacteria can enhance plant growth and degrade organic contaminants such as trichloroethylene and hydrocarbons [90]. The activity of endophytic bacteria can mitigate and improve plant conditions in stressful environments (such as contaminated soils).…”

Section: Endophyte-enhanced Phytoremediationmentioning

confidence: 99%

Biological Remediation of Phenoxy Herbicide-Contaminated Environments

Urbaniak¹,

Mierzejewska²

2019

Environmental Chemistry and Recent Pollution Control Approaches

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Phenoxy herbicides such as 2,4-dichlorophenoxyacetic acid (2,4-D) and 2-methyl-4-chlorophenoxyacetic acid (MCPA) are widely used in agriculture to control broadleaf weeds. Although their application has helped to increase the yield and value of crops, they are also recognized as a source of emerging environmental contamination. Their extensive use may promote contamination of soil, surface, and groundwater and lead to increased inhibition of plant development and soil toxicity. Hence, there is an urgent need to identify nature-based methods based on appropriate biological remediation techniques, such as bio-, phyto-, and rhizoremediation, that enable the effective elimination of phenoxy herbicides from the environment. Bioremediation typically harnesses microorganisms and their ability to utilize recalcitrant contaminants in complete degradation processes, while phytoremediation is a cost-effective, environmentally friendly strategy that uses plants to transform or mineralize xenobiotics to less or nontoxic compounds. Rhizoremediation (microbe-assisted phytoremediation), in turn, is based on the interactions between plant roots, root exudates enriched in plant secondary metabolites, soil, and microorganisms. Based on the above, this chapter presents current knowledge on the properties of phenoxy herbicides, as well as the concentrations detected in the environment, their toxicity, and the biological remediation techniques used for safe removal of the compounds of interest from the environment.

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Section: Endophyte-enhanced Phytoremediationmentioning

confidence: 99%

Biological Remediation of Phenoxy Herbicide-Contaminated Environments

Urbaniak¹,

Mierzejewska²

2019

Environmental Chemistry and Recent Pollution Control Approaches

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“…Valores de temperatura entre 15 e 40°C foram considerados por EEVERS et al (2016) favoráveis à degradação de pesticidas por bactérias isoladas degradadoras desses compostos.…”

Section: Fatores Que Influenciam a Biorremediaçãounclassified

“…A mobilidade e biodisponibilidade dos compostos xenobióticos no solo pode ser controlada por alterações orgânica ou inorgânica, sendo que a primeira apresenta vantagens mais eficazes sobre a segunda. Estas alterações em solos contaminados estimulam a produção de biomassa vegetal, aumentam a distribuição das raízes e sobrevivência da planta, biodisponibilizam os contaminantes e seus metabólitos às plantas melhorando a eficiência da fitoextração (EEVERS et al, 2016). Dentre os aditivos orgânicos mais relatados em processo de fitorremediação estão os resíduos agro-industriais, substâncias húmicas, biochar e matéria orgânica de fácil decomposição.…”

Section: Quadro 2 -Biodegradação De Pesticidas Por Diferentes Espécieunclassified

Biotecnologias De Remediação De Solos Contaminados Com Agroquímicos

Alves¹,

Bandeira²,

Borges³

et al. 2016

Agr. Acad.

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RESUMOA contaminação do ambiente agrícola tornou-se um grave problema global. O uso indiscriminado de pesticidas tem provocado diversos problemas à saúde humana, toxicidade a organismos alvo e não alvo, além de alterar a qualidade do ar, água e solo. Em 2008, o Brasil se tornou o maior consumidor mundial de pesticidas e por isso cresce o interesse em investigar estratégias de remediação in situ desses compostos. Neste sentido o objetivo desta pesquisa foi discutir sobre as diferentes estratégias de fitorremediação e vermirremediação de solos contaminados com pesticidas e as respectivas vantagens e limitações de cada uma dessas biotecnologias. Observou-se que as biotecnologias apresentadas neste trabalho apresentam vantagens econômicas e ambientais em comparação com os métodos físicos e químicos, porém apresentam limitações que precisam ser superadas através de pesquisa científica e ensaios em escala de laboratório, piloto e campo. Muitos trabalhos têm sido desenvolvidos na área de biotecnologias de remediação de solos contaminados por pesticidas, entretanto a maioria ocorre em condições de clima temperado. O Brasil precisa explorar mais essas biotecnologias uma vez que dispõe de elevado potencial por possuir condições climáticas e biodiversidade mais favorável em comparação com regiões de clima temperado. PALAVRAS-CHAVE: Contaminantes orgânicos, fitorremediação, vermirremediação. REMEDIATION BIOTECHNOLOGIES FOR CONTAMINATED SOIL WITH AGROCHEMICALSABSTRACT The contamination of the agricultural environment has become a major global problem. The indiscriminate use of pesticides has caused several problems to human health, toxicity to target organisms and non-target, and change the quality of air, water and soil. In 2008, Brazil became the world's largest consumer of pesticides and therefore growing interest in investigating remediation strategies in situ these compounds. In this sense, the objective of this research is to discuss the different strategies of phytoremediation and vermiremediation of soils contaminated with AGRARIAN ACADEMY, Centro Científico Conhecer -Goiânia, v.3, n.05; p.2016 28 pesticides and their advantages and limitations of each of these biotechnologies. It was observed that biotechnologies presented in this work have economic and environmental advantages compared to the physical and chemical methods, but have limitations that must be overcome through scientific research and conduct testing in laboratory scale, pilot scale and field scale. Many studies have been developed in the area contaminated by pesticides soil remediation technologies, though most occur in temperate conditions. Brazil needs to further explore these biotechnologies since it has high potential for having climatic conditions and more favorable biodiversity compared with temperate regions. KEYWORDS: Phytoremediation, vermiremediation, organic contaminants. INTRODUÇÃOAs principais fontes de contaminação do solo e água provém de rejeitos urbanos e industriais, agroquímicos e/ou vazamentos acidentais de compostos xenobióticos. Q...

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“…The presence of PAHs potentially stimulates the degradative potential of endophytic bacteria by changing the composition and structure of their community [9]; however, the particular mechanism of this occurrence is still unclear.…”

Section: Introductionmentioning

confidence: 99%

“…In this experiment, ryegrass was chosen to be the host plant. Since the most significant genera in the total communities are indeed cultivable under laboratory conditions [9], the cultivable communities were identified, and the microbial communities related to PAH degradation were analyzed. The objectives of this study were: (1) to assess the structure of endophytic bacterial communities in ryegrass exposed to PAHs; (2) to determine the degradation potential of endophytic isolates; (3) and to isolate highly PAH-degrading endophytic bacteria.…”

Section: Introductionmentioning

confidence: 99%

Phenanthrene and Pyrene Modify the Composition and Structure of the Cultivable Endophytic Bacterial Community in Ryegrass (Lolium multiflorum Lam)

Zhu

Sun

et al. 2016

IJERPH

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This study provides new insights into the dynamics of bacterial community structure during phytoremediation. The communities of cultivable autochthonous endophytic bacteria in ryegrass exposed to polycyclic aromatic hydrocarbons (PAHs) were investigated with regard to their potential to biodegrade PAHs. Bacterial counts and 16S rRNA gene sequence were used in the microbiological evaluation. A total of 33 endophytic bacterial strains were isolated from ryegrass plants, which represented 15 different genera and eight different classes, respectively. Moreover, PAH contamination modified the composition and structure of the endophytic bacterial community in the plants. Bacillus sp., Pantoea sp., Pseudomonas sp., Arthrobacter sp., Pedobacter sp. and Delftia sp. were only isolated from the seedlings exposed to PAHs. Furthermore, the dominant genera in roots shifted from Enterobacter sp. to Serratia sp., Bacillus sp., Pantoea sp., and Stenotrophomonas sp., which could highly biodegrade phenanthrene (PHE). However, the diversity of endophytic bacterial community was decreased by exposure to the mixture of PAHs, and increased by respective exposure to PHE and pyrene (PYR), while the abundance was increased by PAH exposure. The results clearly indicated that the exposure of plants to PAHs would be beneficial for improving the effectiveness of phytoremediation of PAHs.

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Exposure of Cucurbita pepo to DDE-contamination alters the endophytic community: A cultivation dependent vs a cultivation independent approach

Cited by 30 publications

References 31 publications

Biological Remediation of Phenoxy Herbicide-Contaminated Environments

Biological Remediation of Phenoxy Herbicide-Contaminated Environments

Biotecnologias De Remediação De Solos Contaminados Com Agroquímicos

Phenanthrene and Pyrene Modify the Composition and Structure of the Cultivable Endophytic Bacterial Community in Ryegrass (Lolium multiflorum Lam)

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