Germination Behavior of Scirrhia acicola Conidia on Pine Needles

Setliff, E. C.; Patton, R. F.

doi:10.1094/phyto-64-1462

Cited by 6 publications

(12 citation statements)

References 3 publications

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“…An asymptomatic phase in which L. acicola establishes within needles can last several days (Setliff and Patton, ) to 3 months (Skilling and Nicholls, ). This is dependent on the strain of the pathogen (Kais, ) and length of the wet season.…”

Section: Symptoms Of Brown Spot Needle Blightmentioning

confidence: 99%

“…Conidia begin to germinate on the needle surfaces by developing one to four germ tubes, depending on the number of cells in the conidia (Setliff and Patton, ). It is uncertain whether the germ tubes are attracted to the stomata, or whether they grow randomly over the needle surface (Patton and Spear, ; Setliff and Patton, ). Light plays an indirect, but essential role in the infection process as it stimulates the opening of stomata, allowing the germ tube to penetrate the needle (Fig.…”

Section: Life Cyclementioning

confidence: 99%

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Lecanosticta acicola: A growing threat to expanding global pine forests and plantations

Nest

Wingfield

Janoušek

et al. 2019

Molecular Plant Pathology

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Summary Lecanosticta acicola causes brown spot needle blight (BSNB) of Pinus species. The pathogen occurs mostly in the Northern Hemisphere but has also been reported in Central America and Colombia. BSNB can lead to stunted growth and tree mortality, and has resulted in severe damage to pine plantations in the past. There have been increasingly frequent new reports of this pathogen in Europe and in North America during the course of the past 10 years. This is despite the fact that quarantine practices and eradication protocols are in place to prevent its spread. Taxonomy Kingdom Fungi; Phylum Ascomycota; Subphylum Pezizomycotina; Class Dothideomycetes; Subclass Dothideomycetidae; Order Capniodales; Family Mycosphaerellaceae; Genus Lecanosticta. Host range and distribution Lecanosticta spp. occur on various Pinus species and are found in North America, Central America, South America (Colombia), Europe as well as Asia. Disease symptoms Small yellow irregular spots appear on the infected pine needles that become brown over time. They can be surrounded by a yellow halo. These characteristic brown spots develop to form narrow brown bands that result in needle death from the tips down to the point of infection. Needles are prematurely shed, leaving bare branches with tufts of new needles at the branch tips. Infection is usually most severe in the lower parts of the trees and progresses upwards into the canopies. Useful websites The EPPO global database providing information on L. acicola (https://gd.eppo.int/taxon/SCIRAC) Reference genome of L. acicola available on GenBank (https://www.ncbi.nlm.nih.gov/genome/?term=Lecanosticta+acicola) JGI Gold Genome database information sheet of L. acicola sequenced genome (https://gold.jgi.doe.gov/organism?xml:id=Go0047147)

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Section: Symptoms Of Brown Spot Needle Blightmentioning

confidence: 99%

Section: Life Cyclementioning

confidence: 99%

Lecanosticta acicola: A growing threat to expanding global pine forests and plantations

Nest

Wingfield

Janoušek

et al. 2019

Molecular Plant Pathology

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“…Growth of the fungus on the surface of bracts was observed by fluorescence microscopy and scanning electron microscopy (SEM). Spore germination and surface growth of genn tubes were observed by fluorescence microscopy of spores treated with a fluorescent brightener, Galcofluor White M2R New (American Cyanamid Go., Bound Brook, New Jersey) (RoHRiNGER et al 1977;SETLIFF and PATTON 1974). Greater detail of stomatal entry was obtained by standard SEM methods (PATTON and SPEAR 1978), which were applied to bracts selected from stems of seedlings that had been sprayed or brushed with suspensions of culture-produced conidia in concentrations that ranged from 1 X 10''tolOOx 10'spores/ml, depending on the nature of the experiment.…”

Section: Methodsmentioning

confidence: 99%

The mode of infection and early stages of colonization of pines by Gremmeniella abietina

Patton

Spear

Blenis

1984

European Journal of Forest Pathology

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Gremmeniella abietina infects shoots of red and Scots pines through stomata on bracts th.it subtend short shoots. The gertn tulic penetrates between guard cells and sparsely colonizes bmct tissue by late summer or fall. Only after about late Januaiy or early Fcbruaiy of the following year does the fungus extend from the bract and begin eolonization of the short shoot and surrounding cortical tissue.~j

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“…Typically, warmer regions in the southern States of the USA have multiple disease cycles per annum, and foliar symptoms, conidia and ascospores can be seen throughout the year (Wolf and Barbour, 1941;Siggers, 1944;Henry, 1954a,b;Kais, 1971Kais, , 1975b. In cooler mid-western and northern regions L. acicola tends to have an annual life cycle, driven by mist and rain-disseminated conidia, with peaks of infection between June and September (Verrall, 1936;Kais, 1971, Nicholls et al, 1973Kais and Peterson, 1986;Wyka et al, 2017).…”

Section: Influence Of Climate On L Acicolamentioning

confidence: 99%

The Increasing Threat to European Forests from the Invasive Foliar Pine Pathogen, Lecanosticta Acicola

et al. 2022

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Germination Behavior of Scirrhia acicola Conidia on Pine Needles

Cited by 6 publications

References 3 publications

Lecanosticta acicola: A growing threat to expanding global pine forests and plantations

Lecanosticta acicola: A growing threat to expanding global pine forests and plantations

The mode of infection and early stages of colonization of pines by Gremmeniella abietina

The Increasing Threat to European Forests from the Invasive Foliar Pine Pathogen, Lecanosticta Acicola

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