Diversity of Root Bacteria From Tobacco Cropping Systems

Kim, J. H.; Skipper, H. D.; Gooden, Dewitt T.; Kaiyi, Xiong

doi:10.3381/0082-4623-45.1.15

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…If the SI value is increased to 0.500 or greater, the number of unidentifiable isolates increases accordingly: 66.6% for Florida bermudagrass, 54.2% for South Carolina bermudagrass, 52.6% for Alabama bentgrass, and 51.1% for North Carolina bentgrass. These values fall within the range of 7.8% to 64% unidentifiable isolates obtained in other studies using GC-FAME for identification purposes (Axelrood et al, 2002;Germida and Siciliano, 2001;Gooden et al, 2004;Kim et al, 2001Kim et al, /2002Lilley et al, 1996;Mahaffee and Kloepper, 1997;Poonguzhali et al, 2006;Siciliano and Germida, 1999). Three of these studies were conducted in field soils in Alabama and South Carolina, states where two of our study sites were located.…”

Section: Resultssupporting

confidence: 79%

“…Other dominant genera in these studies included Arthrobacter (sugar beet and canola), Flavobacterium (sugar beet), and Microbacterium (sugar beet). In multiple-year studies conducted in comparable climates to the study here, but with continuously cropped peanut and tobacco, the dominant genera identified were Arthrobacter in the tobacco rhizosphere (Kim et al, 2001(Kim et al, /2002 and Burkholderia in the peanut rhizosphere (Gooden et al, 2004).…”

Section: Resultsmentioning

confidence: 56%

“…In South Carolina, 35% and 41% of isolates from rotational peanut plots and continuous peanut plots, respectively, could not be identified (Gooden et al, 2004). Likewise, Kim et al (2001Kim et al ( /2002 found up to 33% of isolates from continuous tobacco plots could not be identified. Thus, the number of unidentified isolates in the study here, obtained from an artificially constructed soil, would appear to be similar to the number from field soils in the same states using the same identification system.…”

Section: Resultsmentioning

confidence: 95%

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Taxonomic Diversity of Rhizosphere Bacteria in Golf Course Putting Greens at Representative Sites in the Southeastern United States

Elliott¹,

McInroy²,

Xiong³

et al. 2008

horts

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Taxonomic diversity of bacteria associated with golf course putting greens is a topic that has not been widely explored. The purpose of this project was to isolate and identify culturable bacteria from the rhizosphere of creeping bentgrass (Agrostris palustris Huds.) at two sites (Alabama and North Carolina) and hybrid bermudagrass [Cynodon dactylon (L.) Pers. × C. transvaalensis Burtt-Davy] at two sites (Florida and South Carolina) for a minimum of 3 years with sampling initiated after the construction process. Randomly selected colonies were identified using gas chromatography for analysis of fatty acid methyl ester profiles. Over 9000 isolates were successfully analyzed. When a similarity index of 0.300 or higher was used, the average number of unidentifiable isolates was 38.6%. The two dominant genera in both bentgrass and bermudagrass rhizospheres were Bacillus and Pseudomonas with Bacillus dominant in bermudagrass and Pseudomonas dominant or equal to Bacillus in bentgrass. Other genera that comprised at least 1% of the isolates at all four sites were Clavibacter, Flavobacterium, and Microbacterium. Arthrobacter also comprised a significant portion of the bacterial isolates in the bentgrass rhizosphere, but not the bermudagrass rhizosphere. Overall, there were 40 genera common to all four sites. At the species level, there were five that comprised at least 1% of the isolates at each location: B. cereus, B. megaterium, C. michiganensis, F. johnsoniae, and P. putida. As has been reported for many grasses, we found considerable taxonomic diversity among the culturable bacterial populations from the rhizospheres of bentgrass and bermudagrass grown in sand-based putting greens.

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 95%

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Taxonomic Diversity of Rhizosphere Bacteria in Golf Course Putting Greens at Representative Sites in the Southeastern United States

Elliott¹,

McInroy²,

Xiong³

et al. 2008

horts

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Diversity of Root Bacteria from Peanut Cropping Systems

Gooden¹,

Skipper

Kim

et al. 2004

Peanut Science

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Rhizobacteria play an important role in sustainable agriculture via plant growth and biological control of pests in a number of ecosystems. Understanding the interactions of crop rotation and rhizobacteria on peanut production is a critical research need. Development of a database on the rhizobacteria obtained from continuous and rotational fields of peanut was initiated in 1997 and terminated in 2000. Peanut was planted in monoculture for 4 yr. In rotational plots, peanut, cotton, corn, and peanut were planted in sequence. Rhizobacteria were isolated from the roots of crop plants grown in a Norfolk soil near Florence, SC. These isolates were identified by composition of fatty acids from gas chromatography analysis (GC/FAME). Arthrobacter and Bacillus were the major genera from non-rhizosphere soils. At initiation of this study in July 1997, the plots selected for continuous peanut had more diversity in rhizobacteria than those plots selected for rotation. In July 2000, rhizobacteria diversity was greater from peanut roots in the rotation cropping system than continuous peanut. Even though rhizobacteria diversity was greater in the rotation system, higher peanut yields were recorded in the continuous peanut system in 2000. Burkholderia spp. were always isolated from the peanut and other crop rhizospheres at each sampling date.

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Flue-Cured Tobacco in a Strip-Till Production System

Gooden¹,

Fortnum²,

Skipper³

2008

Tobacco Science

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A four-year study was conducted to compare the effects of strip-till tobacco production under crop rotation to conventional-till tobacco on a South Carolina Coastal Plain soil. A separate two-year study was conducted to define the impact of in-row cultivation and nitrogen application rate on conservation-till tobacco production. Flue-cured tobacco was planted into strip-till without bedding or into a conventional bedded production system. All plants received in-row sub-soiling. In-row cultivation of strip-till tobacco and conventional-till tobacco were evaluated under three nitrogen levels: 78.4, 95.2, and 112.0 kgN/ha. Strip-till tobacco production resulted in a negative impact on tobacco yield, quality, and lodging. The negative attributes of strip-till tobacco production can be partially overcome by cultivation. Increased nitrogen tended to improve yields, but at the expense of leaf quality and chemistry. Crop rotation resulted in significantly improved tobacco yields and value, and reduced root-knot nematode damage. These studies indicate the need for additional research in conservation-till tobacco production.

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Diversity of Root Bacteria From Tobacco Cropping Systems

Cited by 3 publications

References 13 publications

Taxonomic Diversity of Rhizosphere Bacteria in Golf Course Putting Greens at Representative Sites in the Southeastern United States

Taxonomic Diversity of Rhizosphere Bacteria in Golf Course Putting Greens at Representative Sites in the Southeastern United States

Diversity of Root Bacteria from Peanut Cropping Systems

Flue-Cured Tobacco in a Strip-Till Production System

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