Distribution of<i>Xylella fastidiosa</i>Within Roots of Peach

Aldrich, James H.

doi:10.1094/pd-76-0885

Cited by 37 publications

(20 citation statements)

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“…Reduced frequency of bacterial detection within root tissues also may be explained by arbitrary collection of root samples; stems initially were selected during active growth on the basis of symptom presence, whereas roots were selected by meeting criteria of sufficient diameter and accessibility. In their study, Aldrich et al (1) provide evidence that the bacteria are not uniformly distributed within the roots of infected peach trees and suggest that likelihood of detection in roots may be increased by selecting sampling size on the basis of probability of host infection in the sampling area. In our research, sampling a larger number of roots might have increased the frequency of detection of X. fastidiosa.…”

Section: Discussionmentioning

confidence: 99%

Distribution ofXylella fastidiosain Sycamore Associated with Low Temperature and Host Resistance

et al. 2004

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Experiments were conducted in the field and laboratory to determine effects of low temperatures on Xylella fastidiosa populations in American sycamore. Roots and shoots from naturally infected trees at two locations were collected monthly. Sap extracted from the samples was tested by enzyme-linked immunosorbent assay for presence of X. fastidosa and was diluted and plated on periwinkle wilt medium to determine populations of viable bacteria. Cumulative rainfall and hours below temperature thresholds (-5 to 10°C) were recorded at each site. Bacterial populations in shoots were negatively correlated with cumulative hours below -5°C air temperature (r= -0.96). In roots, bacterial populations were only weakly correlated with cumulative hours below soil temperature thresholds (-0.61 < r <-0.25). Bacterial populations were not correlated with monthly rainfall. In the laboratory, resistant and susceptible sycamore trees were inoculated with X. fastidiosa and held in the dark at 5°C or 22°C. After 12 weeks, inoculated stem sections were collected and sap was extracted and tested as described previously. Stems that tested positive for X. fastidiosa were divided into additional samples and tested as described above. Results of the laboratory study indicated no significant effects of low-temperature treatment (5°C) or host resistance on viable bacteria. Bacterial detection frequency and population size were greatest near the inoculation point and the primary direction of early bacterial spread was acropetal.

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Section: Discussionmentioning

confidence: 99%

Distribution ofXylella fastidiosain Sycamore Associated with Low Temperature and Host Resistance

et al. 2004

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“…However, other sources of tissue include small twigs and roots of peach (Aldrich et al ., ), blueberry stem and roots (Holland et al ., ) and citrus fruit peduncles (Rossetti et al ., ).…”

Section: Detectionmentioning

confidence: 99%

PM 7/24 (4) Xylella fastidiosa

2019

EPPO Bulletin

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“…As X. fastidiosa is confined to the xylem tissue of its hosts, the petiole and midrib recovered from leaf samples are the best source for diagnosis as they contain a higher number of xylem vessels (Hopkins, ). However, other sources of tissue include small twigs and roots of peach (Aldrich et al ., ), blueberry stem and roots (Holland et al ., ) and citrus fruit peduncles (Rossetti et al ., ).…”

Section: Detectionmentioning

confidence: 99%

PM 7/24 (3) Xylella fastidiosa

2018

EPPO Bulletin

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Distribution ofXylella fastidiosaWithin Roots of Peach

Cited by 37 publications

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Distribution ofXylella fastidiosain Sycamore Associated with Low Temperature and Host Resistance

Distribution ofXylella fastidiosain Sycamore Associated with Low Temperature and Host Resistance

PM 7/24 (4) Xylella fastidiosa

PM 7/24 (3) Xylella fastidiosa

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