Scleroderris lagerbergii: Resistance and differences in attack between pine species and provenances

Roll-Hansen, F.

doi:10.1111/j.1439-0329.1972.tb00340.x

Cited by 26 publications

(8 citation statements)

References 6 publications

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“…There are several examples of differences in susceptibility to pathogens among tree host individuals and populations from different locations (Roll‐Hansen, ; Hunt et al ., ; Carnegie et al ., ; Swedjemark et al ., ; Hamilton et al ., ; Balmelli et al ., ; Romeralo et al ., ; Štochlová et al ., ). For example, European larch ( Larix decidua ) differs strongly in susceptibility to larch canker ( Lachnellula willkommii ) depending on the provenance (Yde‐Andersen, ).…”

Section: Evolutionary Aspects Of Ash Genetic Diversity and Variation mentioning

confidence: 99%

Ash dieback due toHymenoscyphus fraxineus: what can be learnt from evolutionary ecology?

et al. 2016

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The future existence of common ash (Fraxinus excelsior), an important tree species throughout temperate Europe, is threatened. An invasive fungal disease (ash dieback) has spread through much of the distribution area of common ash. The causal agent of the disease is Hymenoscyphus fraxineus, a necrotrophic ascomycete, most probably introduced from Asia in the early 1990s. Hymenoscyphus fraxineus infects ash trees and saplings through their leaves, from which it grows into the stem. The fungus was studied intensively in recent years but there is still a need to address the topic from an evolutionary perspective. In this overview, some key evolutionary aspects of ash dieback are discussed, from the Red Queen dynamics of host–pathogen interactions to the probable consequences for virulence evolution of multiple infections. The progression of ash dieback in Europe does not show spatial differences, but studies show variation in susceptibility within host populations, a probable consequence of genetic differences, thus providing material for evolution of disease resistance or tolerance. Breeding programmes need to maintain the genetic diversity of Fraxinus, to enable it to withstand further threats such as climate change and the emerald ash borer. Because H. fraxineus reproduces exclusively sexually, the pathogen is likely to overcome a narrow genetic resistance. The introduction of further strains of H. fraxineus to Europe and the movement of infected plant material should be avoided. This case study shows that the integration of evolutionary ecology considerations would benefit plant disease management and biosecurity in general.

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Section: Evolutionary Aspects Of Ash Genetic Diversity and Variation mentioning

confidence: 99%

Ash dieback due toHymenoscyphus fraxineus: what can be learnt from evolutionary ecology?

et al. 2016

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“…Morelet is known to infect and cause damage (Scleroderris-canker) to e.g. Pinus sylvestris (L.) (Roll-Hansen, 1972). Buds or current-year shoots of a tree are infected during the summer and the disease appears to remain in a latent state until the winter when the hyphae start colonizing the living tissue of the host (see Hellgren, 1995).…”

Section: Introductionmentioning

confidence: 99%

Crown transparency, tree mortality and stem growth of Pinus sylvestris, and colonization of Tomicus piniperda after an outbreak of Gremmeniella abietina

Sikström

Jacobson

Pettersson

et al. 2011

Forest Ecology and Management

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“…Susceptibility of conifers to G. abietina is to some degree under genetic control of the host (Roll-Hansen, 1972;Nevalainen and Uotila, 1984;Stephan et al 1984;Dietrichson and Solheim, 1987;Aitken, 1993;Hansson 1998;Sonesson et al, 2007). However, the role of environmental factors in disease development is essential; severe epidemics occur exclusively under environmental conditions which both predispose the host and favour the spread and survival of the fungus (Donaubauer, 1972;Petäistö and Kurkela, 1993).…”

Section: Introductionmentioning

confidence: 99%

Susceptibility of Pinus nigra and Cedrus libani to Turkish Gremmeniella abietina isolates

2012

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Gremmeniella abietina causes shoot dieback and stem cankers on conifers throughout Northern hemisphere. The aim of this study was to investigate the virulence of Turkish G. abietina isolates in a field experiment.The lower branches of 15-20-year-old P. nigra and C. libani in a plantation site at 1,050 m a.s.l. in Isparta were inoculated at 1-2-month intervals during September-January. Five isolates obtained from high altitude mountainous forests were used. Each isolate was inoculated into two branches per tree and repeated ten times on both tree species at each inoculation date. The branches were sampled at the end of February, and in August, and lesion lengths in the inner bark measured.The mean lesion length on P. nigra and C libani were 10.6 ± 0.8 and 3.8 ± 0.2 mm in February and 17.6 ± 1.4 and 7.8 ± 0.8 mm in August, respectively.Differences in the mean lesion length between the isolates were small. Nevertheless, there were significant differences between the isolates on P. nigra in November and January inoculations, and on C. libani at all four inoculation times.The mean lesion lengths for all isolates at both sampling dates was the highest (p < 0.01) in December inoculations for both P. nigra (22.0 ± 1.9 February; 32.9 ± 2.9 August) and C. libani (5.6 ± 0.7; 11.3 ± 1.2). There was no difference between the September and January inoculations on P. nigra, despite the almost six-fold difference in incubation period. During the December inoculations, the trees were most likely in winter dormancy, i.e. unable to defend themselves, which would explain the large lesions.

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Scleroderris lagerbergii: Resistance and differences in attack between pine species and provenances

Cited by 26 publications

References 6 publications

Ash dieback due toHymenoscyphus fraxineus: what can be learnt from evolutionary ecology?

Ash dieback due toHymenoscyphus fraxineus: what can be learnt from evolutionary ecology?

Crown transparency, tree mortality and stem growth of Pinus sylvestris, and colonization of Tomicus piniperda after an outbreak of Gremmeniella abietina

Susceptibility of Pinus nigra and Cedrus libani to Turkish Gremmeniella abietina isolates

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