Microbe and plant assisted-remediation of organic xenobiotics and its enhancement by genetically modified organisms and recombinant technology: A review

Hussain, Imran; Aleti, Gajender; Naidu, Ravi; Puschenreiter, Markus; Mahmood, Qaisar; Rahman, Mohammad Mahmudur; Wang, Fang; Shaheen, Shahida; Syed, Jabir Hussain; Reichenauer, Thomas G.

doi:10.1016/j.scitotenv.2018.02.037

Cited by 135 publications

(39 citation statements)

References 278 publications

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“…The bacterial plant microbiome is important for plant growth and health, increasing nutrient acquisition (Knoth et al, 2014;Pankievicz et al, 2015;Alori et al, 2017;Chhabra and Dowling, 2017), improving abiotic stress tolerances (Cura et al, 2017;Lata et al, 2018;Zhang et al, 2019), protecting against pathogens (Bulgarelli et al, 2013;Pandey et al, 2019), modulating plant hormones (Santoyo et al, 2016;Ali et al, 2017), and detoxifying environmental pollutants (Afzal et al, 2014;Hussain et al, 2018). There is a strong and steadily increasing interest in microbial endophytes of plants (Rho et al, 2017) and how they could be harnessed to improve sustainability in agriculture, forestry and bioenergy production (Busby et al, 2017;Doty, 2017).…”

Section: Introductionmentioning

confidence: 99%

Influences of Climate on Phyllosphere Endophytic Bacterial Communities of Wild Poplar

et al. 2020

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Plant-associated microbial communities play a central role in the plant response to biotic and abiotic stimuli, improving plant fitness under challenging growing conditions. Many studies have focused on the characterization of changes in abundance and composition of root-associated microbial communities as a consequence of the plant response to abiotic factors such as altered soil nutrients and drought. However, changes in composition in response to abiotic factors are still poorly understood concerning the endophytic community associated to the phyllosphere, the above-ground plant tissues. In the present study, we applied high-throughput 16S rDNA gene sequencing of the phyllosphere endophytic bacterial communities colonizing wild Populus trichocarpa (black cottonwood) plants growing in native, nutrient-limited environments characterized by hot-dry (xeric) riparian zones (Yakima River, WA), riparian zones with mid hot-dry (Tieton and Teanaway Rivers, WA) and moist (mesic) climates (Snoqualmie, Skykomish and Skagit Rivers, WA). From sequencing data, 587 Amplicon Sequence Variants (ASV) were identified. Surprisingly, our data show that a core microbiome could be found in phyllosphere-associated endophytic communities in trees growing on opposite sides of the Cascades Mountain Range. Considering only taxa appearing in at least 90% of all samples within each climatic zone, the core microbiome was dominated only by two ASVs affiliated Pseudomonadaceae and two ASVs of the Enterobacteriaceae family. Alpha-diversity measures indicated that plants colonizing hot-dry environments showed a lower diversity than those from mid hot-dry and moist climates. Beta-diversity measures showed that bacterial composition was significantly different across sampling sites. Accordingly, we found that specific ASV affiliated to Pseudomonadaceae and Enterobacteriaceae were significantly more abundant in the phyllosphere endophytic community colonizing plants adapted to the xeric environment. In summary, this study highlights that sampling site is the major driver of variation and that only a few ASV showed a distribution that significantly correlated to climate variables.

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Section: Introductionmentioning

confidence: 99%

Influences of Climate on Phyllosphere Endophytic Bacterial Communities of Wild Poplar

et al. 2020

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“…Unatoč tomu, mnogi mikroorganizmi imaju sposobnost vraćanja takvih tvari u prirodan biogeokemijski ciklus. 10,11 Potencijal mikroorganizama u uklanjanju onečišćujućih tvari proizlazi iz njihove raznolikosti, brojnosti i prilagodljivosti. 12 Primjena bioremedijacije pogodna je na onečišćenim mjestima čija obnova nije hitna te tamo gdje se ne mogu primijeniti drugi postupci uklanjanja onečišćenja.…”

Section: Bioremedijacijaunclassified

“…2,20,21,22 Tablica 1 -Mikroorganizmi s bioremedijacijskim potencijalom uklanjanja onečišćujućih tvari 23 Kako bi se uspješno uklonilo onečišćenje bioremedijacijom, potrebno je dobro razumijevanje fizikalno-kemijskih svojstava onečišćenog područja i mikrobnih zajednica (tablica 1) koje su uključene u proces. 10,[23][24][25] Upotreba mikroorganizama u procesu bioremedijacije ima velik potencijal uspješnog uklanjanja onečišćenja iz okoliša, ali nedostatak informacija o čimbenicima koji utječu na rast i metabolizam različitih mikrobioloških vrsta ograničava njihovu uporabu. Jedan od razloga zašto naše znanje o mikrobiološkim putovima razgradnje nije sveobuhvatno je visoka složenost mikrobiološke fiziologije koja daje odgovor i omogućava prilagodbu mikroorganizma na različite vanjske i unutarnje podražaje.…”

Section: Bioremedijacijaunclassified

“…U područje sintetske biologije ubrajamo genetičko modificiranje mikroorganizama i razvoj umjetnih, odnosno "sintetskih" mikrobnih zajednica. 10,20 Ubrzani razvoj sintetske biologije omogućava stvaranje i optimiranje sintetskih mikrobnih zajednica s posebnim svojstvima. 26,27 Dakle, usporedno s razvojem metoda kojima se procesi bioremedijacije izučavaju na razini gena razvijaju se umjetne mikrobne zajednice i genetički modificirani organizmi s velikim bioremedijacijskim potencijalom.…”

Section: Bioremedijacijaunclassified

“…U tom se slučaju gen za aktivnost iz drugog organizma koji nije prikladan za upotrebu u bioremedijaciji iz praktičnih razloga "ubacuje" u prvi organizam. 2,10 Genetički Problem može nastati u slučaju kada modificirani organizmi prevladaju nad autohtonima jer tada dolazi do ugrožavanja ekološke ravnoteže. Također, protok gena između genetički modificiranog i prirodnog organizma možda je i najveći rizik prilikom upotrebe modificiranih organizama u bioremedijaciji in situ jer se na taj način može prenijeti otpornost na antibiotike u patogene mikroorganizme.…”

Section: Genetičko Inženjerstvo U Funkciji Bioremedijacijeunclassified

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Povećanje učinkovitosti bioremedijacije na razini gena

Česnik

Blažević²,

Domanovac³

2019

Kem. ind. (Online)

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Bioremedijacija se koristi potencijalom mikroorganizama pri uklanjanju onečišćenja iz okoliša. Metabolički putovi kojima se onečišćujuća tvar razgrađuje u manje toksične tvari vrlo su kompleksni. Naprednim tehnikama molekularne biologije mehanizmi bioremedijacije izučavaju se na razini gena. Gen zaslužan za proizvodnju proteina koji razgrađuje onečišćujuću tvar može se izolirati i unijeti u drugi organizam, čime nastaje organizam s poboljšanim bioremedijacijskim svojstvima. Brojna se svjetska istraživanja temelje na genetičkom inženjerstvu na mikroorganizmima, no najveću prepreku upotrebe takvih organizama u bioremedijaciji čine zakonski okviri te nedovoljno poznavanje posljedica njihova oslobađanja u okoliš.

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