The Secret Life of Foliar Bacterial Pathogens on Leaves

Beattie, Gwyn A.

doi:10.1146/annurev.phyto.33.1.145

Cited by 67 publications

(92 citation statements)

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“…Wilson et al (1991) showed that some of the leafassociated population of saprophytic pseudomonads could survive surface sterilization. Beattie and Lindow (1995) suggested that P. fluorescens may survive on leaf surfaces by occupying particular surface sites. Saprophytic Pseudomonas isolates were shown to colonize substomatal chambers (Blakeman, 1972).…”

Section: Discussionmentioning

confidence: 99%

“…Fluorescent pseudomonad strains have been reported to control diseases caused by soil-borne pathogens (Weller, 1988;Capper & Higgins, 1993;Vidhyasekaran & Muthamilan, 1995) and are known to survive in both rhizosphere and phyllosphere (Wilson et al, 1991;Beattie & Lindow, 1995). Earlier studies indicated that foliar diseases could be controlled by application of fluorescent pseudomonads as seed, soil or root treatments and it is presumed that they may induce systemic resistance and thus protect the leaves (Wei et al, 1991;Alstrom, 1991;Maurhofer et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

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Development of a powder formulation of Pseudomonas fluorescens for control of rice blast

et al. 1997

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Pseudomonas fluorescens strain Pf1, inhibitory to the growth of the rice blast pathogen Pyricularia oryzae in vitro, was developed as a talc-based powder formulation. When rice seeds were treated with this formulation, the bacteria spread to roots, stems and leaves of the plants and protected against leaf infection by P. oryzae. When applied as a foliar spray, the bacteria survived on the leaves. The powder formulation controlled leaf blast under greenhouse conditions. In tests as a seed treatment and foliar spray in four field trials it effectively controlled the disease and increased grain yield.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of a powder formulation of Pseudomonas fluorescens for control of rice blast

et al. 1997

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“…The phylloplane can be characterized as a very unfavourable habitat for micro-organisms, showing rapid changes in temperature, u.v.-irradiation, osmotic potential, and water and nutrient supply (Beattie & Lindow, 1995). Thus, increased leaf wetting can have important consequences for phyllosophere ecology.…”

Section: Wetting Properties Of Model Surfaces Colonized By Epiphytic mentioning

confidence: 99%

Influence of epiphytic micro‐organisms on leaf wettability: wetting of the upper leaf surface of Juglans regia and of model surfaces in relation to colonization by micro‐organisms

Knoll

Schreiber

1998

New Phytologist

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Wetting of the upper leaf surface of Juglans regia L. and of model surfaces colonized by epiphytic micro-organisms was investigated by measuring contact angles of aqueous solutions buffered at different pH values. During June to October 1995, contact angles of aqueous solutions on the leaf surface of J. regia decreased by angles ranging from 12m (low pH values) to 25m at high pH values. At the end of this vegetation period, wetting was strongly dependent on pH showing significantly lower contact angles with alkaline solutions (pH 9n0) than with acidic solutions (pH 3n0). Contact angle titration measured angles on the leaf surface as a function of the pH of buffered aqueous solutions, covering a pH range from 3n0 to 11n0. Titration curves revealed inflection points around 7n5, indicating the existence of ionizable carboxylic groups at the interface of the phylloplane. Altered leaf-surface wetting properties observed on the intact leaf surface could be simulated in model experiments by measuring contact angles on artificial surfaces colonized by Pseudomonas fluorescens and by epiphytic micro-organisms isolated from the phylloplane of J. regia. Strong evidence is provided that interfacial carboxylic groups derive from epiphytic micro-organisms present on the phylloplane. Results suggest that the age-dependent increase in, and pH dependence of, wetting as leaves mature are related to the presence of epiphytic micro-organisms on the phylloplane. Ecological consequences of increased leaf-surface wetting, concerning the structure of the leaf surface as a microhabitat for epiphytic micro-organisms, are discussed.

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“…However, positive effects, such as increases in plant growth, and changes in plant community composition caused by mycorrhiza associations and plant-growth promoting bacteria were also reported (Compant et al 2005). Direct effects of plants on microbial community, such as root exudates and particulate organic matter rhizodeposited by plants, can determine the nature of microbial habitats and local nutrient conditions (Puget andDrinkwater 2001, Orwin et al 2006); these compounds can also indirectly influence bacterial metabolism and plant gene expression (Beattie and Lindow 1995). A better understanding of the role that plant species play in determining soil microbial community structure will contribute to the predictability of soil biogeochemistry.…”

mentioning

confidence: 99%

Effect of legume-cereal mixtures on the diversity of bacterial communities in the rhizosphere

Qiao¹,

Li²,

Wang³

et al. 2012

PLANT SOIL ENVIRON

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Aboveground plant diversity is known to influence belowground diversity and ecosystem processes. However, there is little knowledge of soil microbial succession in legume-grass mixtures. Therefore, this study was designed to determine the effect of oat and common vetch binary mixtures at three seeding rates on soil bacterial communities. Denaturing gradient gel electrophoresis (DGGE) of 16S rDNA fragments was used to profile the structure of the bacterial community in the rhizosphere. Compared with a monoculture of common vetch and oat, the ShannonWeaver index and species richness of the mixtures were increased. Thirteen cloned monocultures and mixtures of oat and common vetch soil 16S rDNA sequences were deposited to NCBI. Based on the sequencing results, the bands could be identified as related to Proteobacteria, Bacteroidetes and Cyanobacteria. Common vetch did not have some bacteria relatives to Sphingomonas spp. Some bacterial taxa could be detected in the ratio of 1:1 and 1:2, but not in the ratio of 1:3, e.g. Myxococcales. The results suggested that the belowground diversity could be promoted by mixed cropping systems.

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The Secret Life of Foliar Bacterial Pathogens on Leaves

Cited by 67 publications

References 0 publications

Development of a powder formulation of Pseudomonas fluorescens for control of rice blast

Development of a powder formulation of Pseudomonas fluorescens for control of rice blast

Influence of epiphytic micro‐organisms on leaf wettability: wetting of the upper leaf surface of Juglans regia and of model surfaces in relation to colonization by micro‐organisms

Effect of legume-cereal mixtures on the diversity of bacterial communities in the rhizosphere

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