Publications

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xylella fastidiosa isolates from both subsp. multiplex and fastidiosa cause disease on southern highbush blueberry (vaccinium sp.) under greenhouse conditions.xylella fastidiosa is a xylem-limited gram-negative plant pathogen that affects numerous crop species, including grape, citrus, peach, pecan, and almond. recently, x. fastidiosa has also been found to be the cause of bacterial leaf scorch on blueberry in the southeastern united states. thus far, all x. fastidiosa isolates obtained from infected blueberry have been classified as x. fastidiosa subsp. multiplex; however, x. fastidiosa subsp. fastidiosa isolates are also present in the southeastern ...201525738552
differential iridoid production as revealed by a diversity panel of 84 cultivated and wild blueberry species.cultivated blueberry (vaccinium corymbosum, vaccinium angustifolium, vaccinium darrowii, and vaccinium virgatum) is an economically important fruit crop native to north america and a member of the ericaceae family. several species in the ericaceae family including cranberry, lignonberry, bilberry, and neotropical blueberry species have been shown to produce iridoids, a class of pharmacologically important compounds present in over 15 plant families demonstrated to have a wide range of biological ...028609455
elevated genetic diversity in the emerging blueberry pathogen exobasidium maculosum.emerging diseases caused by fungi are increasing at an alarming rate. exobasidium leaf and fruit spot of blueberry, caused by the fungus exobasidium maculosum, is an emerging disease that has rapidly increased in prevalence throughout the southeastern usa, severely reducing fruit quality in some plantings. the objectives of this study were to determine the genetic diversity of e. maculosum in the southeastern usa to elucidate the basis of disease emergence and to investigate if populations of e. ...201526207812
exobasidium maculosum, a new species causing leaf and fruit spots on blueberry in the southeastern usa and its relationship with other exobasidium spp. parasitic to blueberry and cranberry.exobasidium leaf and fruit spot of blueberry (vaccinium section cyanococcus) is an emerging disease that has rapidly increased in prevalence throughout the southeastern usa. to determine whether this disease is caused by a new species of exobasidium, we studied the morphology and phylogenetic relationship of the causal fungus compared with other members of the genus, including the type species e. vaccinii and other species that parasitize blueberry and cranberry (v. macrocarpon). both scanning e ...201624871592
nondestructive detection and quantification of blueberry bruising using near-infrared (nir) hyperspectral reflectance imaging.currently, blueberry bruising is evaluated by either human visual/tactile inspection or firmness measurement instruments. these methods are destructive, time-consuming, and subjective. the goal of this paper was to develop a non-destructive approach for blueberry bruising detection and quantification. experiments were conducted on 300 samples of southern highbush blueberry (camellia, rebel, and star) and on 1500 samples of northern highbush blueberry (bluecrop, jersey, and liberty) for hyperspec ...201627767050
chemical characterization and cytotoxic activity of blueberry extracts (cv. misty) cultivated in brazil.vaccinium corymbosum (l.) varieties cultivation is relatively recent in brazil, but its production has been intensified given its good adaptability to the southern brazil climate. blueberries are a rich source of phenolic compounds and contain significant levels of anthocyanins, flavonols, chlorogenic acids, and procyanidins, which lead to different biological activities. chemical identification of skin and whole hydroalcoholic blueberry extracts (extsb and extwb) revealed the presence of anthoc ...201627411085
identifying breeding priorities for blueberry flavor using biochemical, sensory, and genotype by environment analyses.breeding for a subjective goal such as flavor is challenging, as many blueberry cultivars are grown worldwide, and identifying breeding targets relating to blueberry flavor biochemistry that have a high degree of genetic control and low environmental variability are priorities. a variety of biochemical compounds and physical characters induce the sensory responses of taste, olfaction, and somatosensation, all of which interact to create what is perceived flavor. the goal of this study was to ide ...201526378911
comparison of cultivars and seasonal variation in blueberry (vaccinium species) leaf extract on adult t-cell leukemia cell line growth suppression.the inhibitory effects of blueberry leaves on the proliferation of adult t-cell leukemia (atl) cell lines have previously been reported. a comparison of blueberry leaf extracts from different cultivars and seasonal variation were investigated regarding their effects on atl cell line proliferation. the inhibitory effects of 80% ethanol leaf extracts from different blueberry cultivars collected from april to december in 2006 or 2008 were evaluated using two atl cell lines. the bioactivities of lea ...201428933373
aroma active volatiles in four southern highbush blueberry cultivars determined by gas chromatography-olfactometry (gc-o) and gas chromatography-mass spectrometry (gc-ms).aroma active volatiles in four southern highbush blueberry cultivars ('prima dona', 'jewel', 'snow chaser', and 'kestrel') were determined using solid phase microextraction (spme) in combination with gas chromatography-olfactometry (gc-o) and identified via gc-pfpd and gc-ms using retention indices of reference compounds and mass spectral data. the aromas of total, unseparated spme extracts evaluated using gc-o were rated 8.2-9.0/10 for the four cultivars in terms of similarity to the original b ...201424758568
correlation between sensory and instrumental measurements of standard and crisp-texture southern highbush blueberries (vaccinium corymbosum l. interspecific hybrids).fruit texture is a primary selection trait in southern highbush blueberry (shb) breeding to increase fresh fruit postharvest quality and consumer acceptance. a novel crisp fruit texture has recently been identified among shb germplasm. in this study, we developed a common set of descriptors that align sensory evaluation of blueberry fruit texture with instrumental measures that could be used for quantitative measurements during pre- and postharvest evaluation.201424619938
effects of southern highbush blueberry cultivar and treatment threshold on flower thrips populations.in florida, southern highbush (shb) blueberries (vaccinium corymbosum l. x vaccinium darrowi camp) are grown for a highly profitable early season fresh market. flower thrips are the key pest of shb blueberries, and frankliniella bispinosa (morgan) is the most common species found. flower thrips injure blueberry flowers by feeding and ovipositing in all developing tissues. these injuries can lead to scarring of developing fruit. the objectives of this study were to determine the relationship betw ...201222606818
an efficient rna isolation procedure and identification of reference genes for normalization of gene expression in blueberry.application of transcriptomics approaches can greatly enhance our understanding of blueberry physiology. the success of transcriptomics approaches is dependent on the extraction of high-quality rna which is complicated by the abundance of polyphenolics and polysaccharides in blueberry. additionally, transcriptomics requires the accurate quantification of transcript abundance. quantitative real-time polymerase chain reaction (qrt-pcr) is a robust method to determine transcript abundance. normaliz ...201121761237
volatile composition of four southern highbush blueberry cultivars and effect of growing location and harvest date.the volatile composition of four southern highbush blueberry cultivars ('primadonna', 'jewel', 'snowchaser', and 'fl02-40') grown in two locations (gainesville and haines city, fl) and harvested multiple times was investigated. a total of 42 volatiles were identified, including 8 esters, 12 terpenoids, 11 aldehydes, 7 alcohols, and 4 ketones. twelve of these volatiles are reported for the first time in highbush blueberries, with 10 being positively identified: (z)-3-hexenal, (e,e)-2,4-hexadienal ...201121721574
effects of exogenous abscisic acid on fruit quality, antioxidant capacities, and phytochemical contents of southern high bush blueberries.abscisic acid (aba) is a plant growth regulator that has a potential to increase antioxidant capacity and phenolic content of fruits and vegetables. the objective of this study was to examine whether an exogenous aba application can positively affect fruit quality, antioxidant capacity, and phytochemical content of southern high bush blueberries (vaccinium darrowii). two varieties, namely star and windsor, were tested with aba water solutions of three concentrations (0, 200, and 400ppm) using a ...201229243625
susceptibility of low-chill blueberry cultivars to mediterranean fruit fly, oriental fruit fly, and melon fly (diptera: tephritidae).no-choice tests were conducted to determine whether fruit of southern highbush blueberry, vaccinium corymbosum l., hybrids are hosts for three invasive tephritid fruit flies in hawaii. fruit of various blueberry cultivars was exposed to gravid female flies of bactrocera dorsalis hendel (oriental fruit fly), ceratitis capitata (wiedemann) (mediterranean fruit fly), or bactrocera cucurbitae coquillet (melon fly) in screen cages outdoors for 6 h and then held on sand in the laboratory for 2 wk for ...201121510205
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