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Article: Effect of rock dust-amended compost on the soil properties, soil microbial activity, and fruit production in an apple orchard from the Jiangsu province of China

Li, Jiangang / Mavrodi, Dmitri V. / Dong, Yuanhua

Archiv für Acker- und Pflanzenbau und Bodenkunde. 2021 Aug. 24, v. 67, no. 10

2021

Abstract: This study examined the effect of compost fortified with rock dust on the soil properties, soil microbial activity, and yield and fruit quality in a mature apple orchard from the Jiangsu province of China. The incorporation of rock dust significantly ... ...

Abstract	This study examined the effect of compost fortified with rock dust on the soil properties, soil microbial activity, and yield and fruit quality in a mature apple orchard from the Jiangsu province of China. The incorporation of rock dust significantly improved the microelement contents of Ca, Mg, Fe, Mn, Zn, B, and Al, but without increasing phytotoxicity of the compost. The fortified compost had higher metabolic activity and functional diversity of microorganisms as determined by the community-level physiological profiling with Biolog EcoPlates. The two-year incorporation of the rock dust compost into a poor-quality soil led to a significant increase in the yield with the increase of 120% and 187% compared to untreated control in 2013 and 2014, respectively. Application of the rock dust compost obviously promoted superoxide dismutase (SOD) activity and concentration of vitamin C in mature apple trees. The beneficial effects coincided with higher microbial activity and shifts in the composition of the soil microbiome. Our results demonstrate that the practice of combining the rock dust-fortified compost with NPK fertilizers provides a cost-effective way of supplying crops with macro-and micronutrients ensuring better vegetative growth and higher yields.
Keywords	apples ; ascorbic acid ; biochemical pathways ; composts ; dust ; fruit quality ; fruits ; functional diversity ; microbial activity ; orchards ; phytotoxicity ; soil microorganisms ; superoxide dismutase ; vegetative growth ; China
Language	English
Dates of publication	2021-0824
Size	p. 1313-1326.
Publishing place	Taylor & Francis
Document type	Article
ZDB-ID	1132910-5
ISSN	1476-3567 ; 0365-0340
ISSN (online)	1476-3567
ISSN	0365-0340
DOI	10.1080/03650340.2020.1795136
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Draft Genome Sequences of Xylella fastidiosa subsp.

Mavrodi, Olga V / Mavrodi, Dmitri V / Stafne, Eric T / Adamczyk, John J / Babiker, Ebrahiem M

Microbiology resource announcements

2020 Volume 9, Issue 25

Abstract: We report here high-quality draft whole-genome assemblies ... ...

Abstract	We report here high-quality draft whole-genome assemblies of
Language	English
Publishing date	2020-06-18
Publishing country	United States
Document type	Journal Article
ISSN	2576-098X
ISSN (online)	2576-098X
DOI	10.1128/MRA.00562-20
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Article: Comparative Analysis of Rhizosphere Microbiomes of Southern Highbush Blueberry (

Li, Jiangang / Mavrodi, Olga V / Hou, Jinfeng / Blackmon, Chazden / Babiker, Ebrahiem M / Mavrodi, Dmitri V

Frontiers in microbiology

2020 Volume 11, Page(s) 370

Abstract: Plants are inhabited by millions of parasitic, commensal, and mutualistic microorganisms that coexist in complex ecological communities, and profoundly affect the plant's productivity, health, and capacity to cope with environmental stress. Therefore, a ... ...

Abstract	Plants are inhabited by millions of parasitic, commensal, and mutualistic microorganisms that coexist in complex ecological communities, and profoundly affect the plant's productivity, health, and capacity to cope with environmental stress. Therefore, a better understanding of the rhizosphere microbiome may open a yet untapped avenue for the rational exploitation of beneficial plant-microbe interactions in modern agriculture. Blueberries encompass several wild and cultivated species of shrubs of the genus
Language	English
Publishing date	2020-03-12
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2587354-4
ISSN	1664-302X
ISSN	1664-302X
DOI	10.3389/fmicb.2020.00370
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Article: Exploring the Pathogenicity of

Yang, Mingming / Mavrodi, Dmitri V / Mavrodi, Olga V / Thomashow, Linda S / Weller, David M

Plant disease

2020 Volume 104, Issue 4, Page(s) 1026–1031

Abstract: Pseudomonas ... ...

Abstract	Pseudomonas brassicacearum
MeSH term(s)	Lycopersicon esculentum ; Northwestern United States ; Phloroglucinol ; Plant Roots ; Pseudomonas ; Pseudomonas fluorescens ; Virulence
Chemical Substances	Phloroglucinol (DHD7FFG6YS)
Language	English
Publishing date	2020-01-29
Publishing country	United States
Document type	Journal Article
ZDB-ID	754182-x
ISSN	0191-2917
ISSN	0191-2917
DOI	10.1094/PDIS-09-19-1989-RE
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Article: Differential Response of Wheat Cultivars to Pseudomonas brassicacearum and Take-All Decline Soil.

Yang, Mingming / Mavrodi, Dmitri V / Thomashow, Linda S / Weller, David M

Phytopathology

2018 Volume 108, Issue 12, Page(s) 1363–1372

Abstract: 2,4-Diacetylphloroglucinol (DAPG)-producing Pseudomonas spp. in the P. fluorescens complex are primarily responsible for a natural suppression of take-all of wheat known as take-all decline (TAD) in many fields in the United States. P. brassicacearum, ... ...

Abstract	2,4-Diacetylphloroglucinol (DAPG)-producing Pseudomonas spp. in the P. fluorescens complex are primarily responsible for a natural suppression of take-all of wheat known as take-all decline (TAD) in many fields in the United States. P. brassicacearum, the most common DAPG producer found in TAD soils in the Pacific Northwest (PNW) of the United States, has biological control, growth promoting and phytotoxic activities. In this study, we explored how the wheat cultivar affects the level of take-all suppression when grown in a TAD soil, and how cultivars respond to colonization by P. brassicacearum. Three cultivars (Tara, Finley, and Buchanan) supported similar rhizosphere population sizes of P. brassicacearum when grown in a TAD soil, however they developed significantly different amounts of take-all. Cultivars Tara and Buchanan developed the least and most take-all, respectively, and Finley showed an intermediate amount of disease. However, when grown in TAD soil that was pasteurized to eliminate both DAPG producers and take-all suppression, all three cultivars were equally susceptible to take-all. The three cultivars also responded differently to the colonization and phytotoxicity of P. brassicacearum strains Q8r1-96 and L5.1-96, which are characteristic of DAPG producers in PNW TAD soils. Compared with cultivar Tara, cultivar Buchanan showed significantly reduced seedling emergence and root growth when colonized by P. brassicacearum, and the response of Finley was intermediate. However, all cultivars emerged equally when treated with a DAPG-deficient mutant of Q8r1-96. Our results indicate that wheat cultivars grown in a TAD soil modulate both the robustness of take-all suppression and the potential phytotoxicity of the antibiotic DAPG.
MeSH term(s)	Ascomycota/drug effects ; Genetic Variation ; Genotype ; Host-Pathogen Interactions ; Phloroglucinol/analogs & derivatives ; Phloroglucinol/metabolism ; Plant Diseases/microbiology ; Plant Diseases/prevention & control ; Pseudomonas/chemistry ; Rhizosphere ; Soil Microbiology ; Triticum/genetics ; Triticum/microbiology ; Triticum/physiology
Chemical Substances	2,4-diacetylphloroglucinol (8XV4YYO3WN) ; Phloroglucinol (DHD7FFG6YS)
Language	English
Publishing date	2018-10-17
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	208889-7
ISSN	1943-7684 ; 0031-949X
ISSN (online)	1943-7684
ISSN	0031-949X
DOI	10.1094/PHYTO-01-18-0024-R
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Article: Control of Pseudomonas amygdali pv. loropetali on Metal, Wood, and Loropetalum chinense Stem Surfaces

Copes, Warren E / Mavrodi, Dmitri V / Mavrodi, Olga V

Plant health progress. 2019 Dec. 17, v. 20, no. 4

2019

Abstract: Clorox Germicidal Bleach, Cuproxat, Green-Shield II, KleenGrow, Virkon S, and ZeroTol 2.0 were evaluated for their ability to inactivate Pseudomonas amygdali pv. loropetali on stainless steel (SS), pressure-treated wood (PtW), and loropetalum stem ... ...

Abstract	Clorox Germicidal Bleach, Cuproxat, Green-Shield II, KleenGrow, Virkon S, and ZeroTol 2.0 were evaluated for their ability to inactivate Pseudomonas amygdali pv. loropetali on stainless steel (SS), pressure-treated wood (PtW), and loropetalum stem sections. Clorox at 11% product and Virkon S at 1.0% product eliminated P. amygdali pv. loropetali on SS surfaces and nearly eliminated it on PtW surfaces. Green-Shield II at 0.5% product and KleenGrow at 0.8% product nearly eliminated the bacterium on SS, while causing a significant reduction without elimination on PtW. Cuproxat and ZeroTol 2.0 were not effective against this bacterium in these applications. Clorox and KleenGrow were evaluated further for their ability to kill P. amygdali pv. loropetali on loropetalum stems, which was used as a preliminary surrogate for vegetative stem cuttings. Only Clorox eliminated bacteria from stem surfaces, but the bacterial inoculum level appeared to affect efficacy. Several disinfestants are commercially available that kill P. amygdali pv. loropetali on production surfaces.
Keywords	bacteria ; bleaching agents ; inoculum ; Loropetalum chinense ; Pseudomonas amygdali ; stainless steel ; stems ; wood
Language	English
Dates of publication	2019-1217
Size	p. 270-277.
Publishing place	The American Phytopathological Society
Document type	Article
ISSN	1535-1025
DOI	10.1094/PHP-09-19-0068-RS
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Article: Rhizosphere plant-microbe interactions under water stress.

Bhattacharyya, Ankita / Pablo, Clint H D / Mavrodi, Olga V / Weller, David M / Thomashow, Linda S / Mavrodi, Dmitri V

Advances in applied microbiology

2021 Volume 115, Page(s) 65–113

Abstract: Climate change, with its extreme temperature, weather and precipitation patterns, is a major global concern of dryland farmers, who currently meet the challenges of climate change agronomically and with growth of drought-tolerant crops. Plants themselves ...

Abstract	Climate change, with its extreme temperature, weather and precipitation patterns, is a major global concern of dryland farmers, who currently meet the challenges of climate change agronomically and with growth of drought-tolerant crops. Plants themselves compensate for water stress by modifying aerial surfaces to control transpiration and altering root hydraulic conductance to increase water uptake. These responses are complemented by metabolic changes involving phytohormone network-mediated activation of stress response pathways, resulting in decreased photosynthetic activity and the accumulation of metabolites to maintain osmotic and redox homeostasis. Phylogenetically diverse microbial communities sustained by plants contribute to host drought tolerance by modulating phytohormone levels in the rhizosphere and producing water-sequestering biofilms. Drylands of the Inland Pacific Northwest, USA, illustrate the interdependence of dryland crops and their associated microbiota. Indigenous Pseudomonas spp. selected there by long-term wheat monoculture suppress root diseases via the production of antibiotics, with soil moisture a critical determinant of the bacterial distribution, dynamics and activity. Those pseudomonads producing phenazine antibiotics on wheat had more abundant rhizosphere biofilms and provided improved tolerance to drought, suggesting a role of the antibiotic in alleviation of drought stress. The transcriptome and metabolome studies suggest the importance of wheat root exudate-derived osmoprotectants for the adaptation of these pseudomonads to the rhizosphere lifestyle and support the idea that the exchange of metabolites between plant roots and microorganisms profoundly affects and shapes the belowground plant microbiome under water stress.
MeSH term(s)	Dehydration ; Microbiota ; Plant Roots ; Rhizosphere ; Soil Microbiology ; Triticum
Language	English
Publishing date	2021-04-16
Publishing country	United States
Document type	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	160-0
ISSN	0065-2164
ISSN	0065-2164
DOI	10.1016/bs.aambs.2021.03.001
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Article ; Online: Draft genome sequences of Xylella fastidiosa subsp. fastidiosa strains OK3, VB11, and NOB1 isolated from bunch and muscadine grapes grown in southern Mississippi

Mavrodi, Olga V. / Mavrodi, Dmitri V. / Stafine, Eric T. / Adamczyk, John J. / Babiker, Ebrahiem M.

Microbiology resource announcements. 2020 June 18, v. 9, no. 25

2020

Abstract: We report here high-quality draft whole-genome assemblies of Xylella fastidiosa subsp. fastidiosa strains OK3, VB11, and NOB1 isolated from symptomatic bunch and muscadine grape plants grown in southern Mississippi. ...

Abstract	We report here high-quality draft whole-genome assemblies of Xylella fastidiosa subsp. fastidiosa strains OK3, VB11, and NOB1 isolated from symptomatic bunch and muscadine grape plants grown in southern Mississippi.
Keywords	Vitis rotundifolia ; Xylella fastidiosa subsp. fastidiosa ; bacterial diseases of plants ; genome ; nucleotide sequences ; plant pathogenic bacteria ; Mississippi
Language	English
Dates of publication	2020-0618
Document type	Article ; Online
ISSN	2576-098X
DOI	10.1128/MRA.00562-20
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Article: Differential Response of Wheat Cultivars to Pseudomonas brassicacearum and Take-All Decline Soil

Yang, Mingming / Mavrodi, Dmitri V / Thomashow, Linda S / Weller, David M

Phytopathology. 2018 Dec., v. 108, no. 12

2018

Abstract	2,4-Diacetylphloroglucinol (DAPG)-producing Pseudomonas spp. in the P. fluorescens complex are primarily responsible for a natural suppression of take-all of wheat known as take-all decline (TAD) in many fields in the United States. P. brassicacearum, the most common DAPG producer found in TAD soils in the Pacific Northwest (PNW) of the United States, has biological control, growth promoting and phytotoxic activities. In this study, we explored how the wheat cultivar affects the level of take-all suppression when grown in a TAD soil, and how cultivars respond to colonization by P. brassicacearum. Three cultivars (Tara, Finley, and Buchanan) supported similar rhizosphere population sizes of P. brassicacearum when grown in a TAD soil, however they developed significantly different amounts of take-all. Cultivars Tara and Buchanan developed the least and most take-all, respectively, and Finley showed an intermediate amount of disease. However, when grown in TAD soil that was pasteurized to eliminate both DAPG producers and take-all suppression, all three cultivars were equally susceptible to take-all. The three cultivars also responded differently to the colonization and phytotoxicity of P. brassicacearum strains Q8r1-96 and L5.1-96, which are characteristic of DAPG producers in PNW TAD soils. Compared with cultivar Tara, cultivar Buchanan showed significantly reduced seedling emergence and root growth when colonized by P. brassicacearum, and the response of Finley was intermediate. However, all cultivars emerged equally when treated with a DAPG-deficient mutant of Q8r1-96. Our results indicate that wheat cultivars grown in a TAD soil modulate both the robustness of take-all suppression and the potential phytotoxicity of the antibiotic DAPG.
Keywords	Pseudomonas brassicacearum ; Pseudomonas fluorescens ; antibiotics ; biological control ; cultivars ; decline ; mutants ; phytotoxicity ; population size ; rhizosphere ; root growth ; seedling emergence ; soil ; wheat ; United States
Language	English
Dates of publication	2018-12
Size	p. 1363-1372.
Publishing place	Phytopathology
Document type	Article
Note	Affiliations: First author: State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, P.R. China; second author: Department of Cell and Molecular Biology, The University of Southern Mississippi, Hattiesburg 39406: and third and fourth authors: U.S. Department of Agriculture, Agricultural Research Service, Wheat Health, Genetics and Quality Research Unit, Pullman, WA 99164-6430.
ZDB-ID	208889-7
ISSN	1943-7684 ; 0031-949X
ISSN (online)	1943-7684
ISSN	0031-949X
DOI	10.1094/PHYTO-01-18-0024-R
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Article ; Online: Antimicrobial Activity of, and Cellular Pathways Targeted by,

Adewunmi, Yetunde / Namjilsuren, Sanchirmaa / Walker, William D / Amato, Dahlia N / Amato, Douglas V / Mavrodi, Olga V / Patton, Derek L / Mavrodi, Dmitri V

Applied and environmental microbiology

2020 Volume 86, Issue 4

Abstract: Plant-derived aldehydes are constituents of essential oils that possess broad-spectrum antimicrobial activity and kill microorganisms without promoting resistance. In our previous study, we ... ...

Abstract	Plant-derived aldehydes are constituents of essential oils that possess broad-spectrum antimicrobial activity and kill microorganisms without promoting resistance. In our previous study, we incorporated
MeSH term(s)	Anti-Bacterial Agents/pharmacology ; Benzaldehydes/pharmacology ; Catechin/analogs & derivatives ; Catechin/pharmacology ; Drug Resistance, Multiple, Bacterial ; Microbial Sensitivity Tests ; Pseudomonas aeruginosa/drug effects
Chemical Substances	Anti-Bacterial Agents ; Benzaldehydes ; Catechin (8R1V1STN48) ; 4-anisaldehyde (9PA5V6656V) ; epigallocatechin gallate (BQM438CTEL)
Language	English
Publishing date	2020-02-03
Publishing country	United States
Document type	Journal Article ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	223011-2
ISSN	1098-5336 ; 0099-2240
ISSN (online)	1098-5336
ISSN	0099-2240
DOI	10.1128/AEM.02482-19
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