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Effect of silver nanoparticles and Bacillus cereus LPR2 on the growth of Zea mays
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Effect of silver nanoparticles and Bacillus cereus LPR2 on the growth of Zea mays
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Journal Article
Effect of silver nanoparticles and Bacillus cereus LPR2 on the growth of Zea mays
2020
Overview
The effect of Plant Growth Promoting Rhizobacteria (
Bacillus
sp.) and silver nanoparticles on
Zea mays
was evaluated. The silver nanoparticles were synthesized from
Tagetes erecta
(Marigold) leaf and flower extracts, whereas PGPR isolated from spinach rhizosphere. The silver nanoparticles (AgNPs) were purified using ultra centrifugation and were characterized using UV–Vis spectroscopy at gradient wavelength and also by High Resolution Transmission Electron microscopy (HRTEM). The average particles size of AgNPs was recorded approximately 60 nm. Almost all potential isolates were able to produce Indole Acetic Acid (IAA), ammonia and Hydrogen cyanide (HCN), solubilized tricalcium phosphate and inhibited the growth of
Macrophomina phaseolina
in vitro but the isolate LPR2 was found the best among all. On the basis of 16S rRNA gene sequence, the isolate LPR2 was characterized as
Bacillus cereus
LPR2. The maize seeds bacterized with LPR2 and AgNPs individually showed a significant increase in germination (87.5%) followed by LPR2 + AgNPs (75%). But the maximum growth of root and shoot of maize plant was observed in seeds coated with LPR2 followed by AgNPs and a combination of both.
Bacillus cereus
LPR2 and silver nanoparticles enhanced the plant growth and LPR2 strongly inhibited the growth of deleterious fungal pathogen. Therefore, LPR2 and AgNPs could be utilized as bioinoculant and growth stimulator, respectively for maize.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 631/449
/ 639/925
/ Ammonia
/ Ascomycota - growth & development
/ Bacillus cereus - growth & development
/ Bacillus cereus - metabolism
/ Calcium Phosphates - metabolism
/ Calcium Phosphates - pharmacology
/ Corn
/ Gold
/ Humanities and Social Sciences
/ Hydrogen Cyanide - metabolism
/ Hydrogen Cyanide - pharmacology
/ Indoleacetic Acids - metabolism
/ Indoleacetic Acids - pharmacology
/ Metal Nanoparticles - chemistry
/ Metal Nanoparticles - toxicity
/ RNA, Ribosomal, 16S - genetics
/ rRNA 16S
/ Science
/ Seeds
/ Silver
/ Transmission electron microscopy
/ Zea mays
