Population Tendencies of Pseudomonas cichorii and P. syringae pv. garcae in Young and Mature Coffee Leaves

Oliveira, José Rogério de; Romeiro, R. S.; Muchovej, J. J.

doi:10.1111/j.1439-0434.1991.tb01190.x

Cited by 16 publications

(11 citation statements)

References 5 publications

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“…Perhaps emergent leaves are not the preferential site of colonization for strain PF130A. Differences in the ability of bacteria to colonize mature versus young leaves have been noted in other systems (26).…”

Section: Discussionmentioning

confidence: 88%

Population Sizes, Immigration, and Growth of Epiphytic Bacteria on Leaves of Different Ages and Positions of Field-Grown Endive (Cichorium endivia var. latifolia)

Jacques

Kinkel

Morris

1995

Appl Environ Microbiol

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Total, fluorescent, and pectolytic epiphytic bacterial population sizes were quantified on leaves of different age groups of broad-leaved endive during field cultivation from leaf emergence until harvest. Greater bacterial population densities (log 10 CFU per square centimeter) were observed on outer leaves than on inner leaves of the plants throughout the growing season. These differences were statistically significant for total bacterial populations at all sampling times and were often significant for fluorescent and pectolytic bacterial populations. At harvest, a linear gradient of decreasing densities of epiphytic bacteria from outer (older) to inner (younger) leaves of the head was significant. Leaf age influenced the frequency distribution and variability of bacterial population sizes associated with leaves of broad-leaved endive. Total bacterial population sizes were greater at leaf emergence for leaves emerging during the second half of the cultivation period than for leaves emerging earlier. The size of fluorescent and pectolytic bacterial populations on newly emerged leaves increased throughout the season as plants aged. To assess the importance of plant age on bacterial immigration at leaf emergence, bacterial densities were quantified on leaves emerging simultaneously on plants of different ages. In two of the three experiments, greater bacterial population sizes were observed on leaves emerging on younger plants. This indicates that factors other than an increase in concentration of airborne bacteria can lead to increases in population sizes at leaf emergence as plants age in the field. Results of leaf pruning experiments suggested that adjacent leaves may act as a barrier for immigration of fluorescent bacteria on newly emerged leaves. Survival of an inoculated strain of Pseudomonas fluorescens on newly emerged leaves generally did not vary with the age of plants. However, these effects were not consistent among experiments, suggesting that interactions among micro-and macroenvironmental conditions, physiological condition of leaves, and accessibility of leaves to airborne bacteria are important in controlling epiphytic bacterial population sizes.

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Section: Discussionmentioning

confidence: 88%

Population Sizes, Immigration, and Growth of Epiphytic Bacteria on Leaves of Different Ages and Positions of Field-Grown Endive (Cichorium endivia var. latifolia)

Jacques

Kinkel

Morris

1995

Appl Environ Microbiol

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“…Unfortunately, this correlation does not distinguish between the possibility that bacterial expression of pathogenicity is causal to abundant epiphytic growth, or that a susceptible host provides an environment that is more conducive to bacterial multiplication than that of a resistant host. Symptom expression, per se, probably does not contribute significantly to an increase in population size, at least in the laboratory, since the largest population increases after inoculation usually occur before symptoms are visible (KLEMENT et al 1964;LEBEN et al 1968a;OLIVEIRA et al 1991;STADT and SAETILER 1981;WYMAN and VAN ETIEN 1982).…”

Section: Pathogenicitymentioning

confidence: 96%

Epiphytic Fitness of Phytopathogenic Bacteria: Physiological Adaptations for Growth and Survival

Beattie

Lindow

1994

Bacterial Pathogenesis of Plants and Animals

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“…(2006) showed that just 0·5% of the bacterial species recorded in tropical tree canopies were common to all tree species. Furthermore, both bacterial and fungal population size on leaves has been correlated with leaf position, plant architecture and height in the canopy (Wildman and Parkinson 1979; Oliveira et al. 1991; Jacques et al.…”

Section: Sources Of Microbes Colonizing the Phyllospherementioning

confidence: 99%

Phyllosphere microbiology with special reference to diversity and plant genotype

Whipps

Hand

Pink

et al. 2008

Journal of Applied Microbiology

454

345

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Summary The phyllosphere represents the habitat provided by the aboveground parts of plants, and on a global scale supports a large and complex microbial community. Microbial interactions in the phyllosphere can affect the fitness of plants in natural communities, the productivity of agricultural crops, and the safety of horticultural produce for human consumption. The structure of phyllosphere communities reflects immigration, survival and growth of microbial colonists, which is influenced by numerous environmental factors in addition to leaf physico‐chemical properties. The recent use of culture‐independent techniques has demonstrated considerable previously unrecognized diversity in phyllosphere bacterial communities. Furthermore, there is significant recent evidence that plant genotype can play a major role in determining the structure of phyllosphere microbial communities. The main aims of this review are: (i) to discuss the diversity of phyllosphere microbial populations; (ii) to consider the processes by which microbes colonize the phyllosphere; (iii) to address the leaf characteristics and environmental factors that determine the survival and growth of colonists; (iv) to discuss microbial adaptations that allow establishment in the phyllosphere habitat and (v) to evaluate evidence for plant genotypic control of phyllosphere communities. Finally, we suggest approaches and priority areas for future research on phyllosphere microbiology.

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Population Tendencies of Pseudomonas cichorii and P. syringae pv. garcae in Young and Mature Coffee Leaves

Cited by 16 publications

References 5 publications

Population Sizes, Immigration, and Growth of Epiphytic Bacteria on Leaves of Different Ages and Positions of Field-Grown Endive (Cichorium endivia var. latifolia)

Population Sizes, Immigration, and Growth of Epiphytic Bacteria on Leaves of Different Ages and Positions of Field-Grown Endive (Cichorium endivia var. latifolia)

Epiphytic Fitness of Phytopathogenic Bacteria: Physiological Adaptations for Growth and Survival

Phyllosphere microbiology with special reference to diversity and plant genotype

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