東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

FindBook

Google Book

Amazon

博客來

Differential Impacts of Nanoparticle Formulation on Plant Growth and Soil Bacterial Communities.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Differential Impacts of Nanoparticle Formulation on Plant Growth and Soil Bacterial Communities./
作者:	Egboluche, Nzube Prisca.
面頁冊數:	1 online resource (87 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-02, Section: B.
Contained By:	Dissertations Abstracts International84-02B.
標題:	Environmental science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29166116click for full text (PQDT)
ISBN:	9798834091783

Differential Impacts of Nanoparticle Formulation on Plant Growth and Soil Bacterial Communities.
Egboluche, Nzube Prisca.

Differential Impacts of Nanoparticle Formulation on Plant Growth and Soil Bacterial Communities. - 1 online resource (87 pages)

Source: Dissertations Abstracts International, Volume: 84-02, Section: B.

Thesis (Ph.D.)--Morgan State University, 2022.

Includes bibliographical references

While nanoparticles (NPs) are finding utility in many industries, their impacts on ecosystems and human health remains to be fully explored. Still, it is known that NPs have unique properties not observed in bulk materials and some are known to exhibit antimicrobial properties. Microbiomes are not only key to healthy ecosystems but are also intricately connected to the health of multicellular organisms including plants. Some studies have characterized the impact of NPs on seedling growth in defined culture media, but little is known about their effects in complex natural environments such as soil. The goal of this study was to assess the potential effects of different nanoparticle formulations on seed germination, seedling growth and on soil microbial communities. The model used was the germination and growth of Phaseolus vulgaris and polyvinylpyrrolidone (PVP) coated and uncoated Cu2O, Fe3O4 and Ag2O NPs. Seed imbibition was conducted with nanopure H2O containing different amounts of NPs (0.5, 2.5 & 12.5 mg/ml) then planted in commercial potting soil. The higher amounts of PVP-coated and non-coated Fe3O4 NP decreased seed germination rate. All NP formulations decreased biomass accumulation while both PVP-coated and non-coated Ag2O NPs significantly decreased plant growth at 12.5 mg/ml. Overall, the measured plant growth parameters were impacted by NP treatments particularly the addition of Fe3O4 and Ag2O NPs at higher concentrations. Using two experimental approaches (quantitative PCR and 16S rRNA gene sequencing), effects of the NPs on soil bacterial communities were examined. Alterations in the soil bacterial community composition structure and richness was demonstrated. Bacterial richness was significantly reduced after 30 days of exposure. Particularly, Cu2O and Ag2O NPs caused a shift in class and phyla composition. While the mechanisms of these observations remain to be elucidated, it is proposed that the known antimicrobial properties of NPs and the potential release of ions resulted in differential reduced growth and death of bacteria phyla.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798834091783Subjects--Topical Terms:

677245
Environmental science.
Subjects--Index Terms:

16S rRNAIndex Terms--Genre/Form:

542853
Electronic books.

Differential Impacts of Nanoparticle Formulation on Plant Growth and Soil Bacterial Communities.
LDR:03451nmm a2200397K 4500 001 2354591
005 20230428105623.5
006 m o d
007 cr mn ---uuuuu
008 241011s2022 xx obm 000 0 eng d
020 $a 9798834091783
035 $a (MiAaPQ)AAI29166116
035 $a AAI29166116
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Egboluche, Nzube Prisca. $3 3694947
245 1 0 $a Differential Impacts of Nanoparticle Formulation on Plant Growth and Soil Bacterial Communities.
264 0 $c 2022
300 $a 1 online resource (87 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 84-02, Section: B.
500 $a Advisor: Wachira, James.
502 $a Thesis (Ph.D.)--Morgan State University, 2022.
504 $a Includes bibliographical references
520 $a While nanoparticles (NPs) are finding utility in many industries, their impacts on ecosystems and human health remains to be fully explored. Still, it is known that NPs have unique properties not observed in bulk materials and some are known to exhibit antimicrobial properties. Microbiomes are not only key to healthy ecosystems but are also intricately connected to the health of multicellular organisms including plants. Some studies have characterized the impact of NPs on seedling growth in defined culture media, but little is known about their effects in complex natural environments such as soil. The goal of this study was to assess the potential effects of different nanoparticle formulations on seed germination, seedling growth and on soil microbial communities. The model used was the germination and growth of Phaseolus vulgaris and polyvinylpyrrolidone (PVP) coated and uncoated Cu2O, Fe3O4 and Ag2O NPs. Seed imbibition was conducted with nanopure H2O containing different amounts of NPs (0.5, 2.5 & 12.5 mg/ml) then planted in commercial potting soil. The higher amounts of PVP-coated and non-coated Fe3O4 NP decreased seed germination rate. All NP formulations decreased biomass accumulation while both PVP-coated and non-coated Ag2O NPs significantly decreased plant growth at 12.5 mg/ml. Overall, the measured plant growth parameters were impacted by NP treatments particularly the addition of Fe3O4 and Ag2O NPs at higher concentrations. Using two experimental approaches (quantitative PCR and 16S rRNA gene sequencing), effects of the NPs on soil bacterial communities were examined. Alterations in the soil bacterial community composition structure and richness was demonstrated. Bacterial richness was significantly reduced after 30 days of exposure. Particularly, Cu2O and Ag2O NPs caused a shift in class and phyla composition. While the mechanisms of these observations remain to be elucidated, it is proposed that the known antimicrobial properties of NPs and the potential release of ions resulted in differential reduced growth and death of bacteria phyla.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Environmental science. $3 677245
650 4 $a Microbiology. $3 536250
650 4 $a Soil sciences. $3 2122699
650 4 $a Plant sciences. $3 3173832
653 $a 16S rRNA
653 $a Bacteria communities
653 $a qPCR
653 $a Soil microbiome
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0768
690 $a 0410
690 $a 0481
690 $a 0479
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a Morgan State University. $b Biology. $3 3277042
773 0 $t Dissertations Abstracts International $g 84-02B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29166116 $z click for full text (PQDT)