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Resistance to Gremmeniella abietina (European race, large tree type) in introduced Pinus contorta and native Pinus sylvestris in Sweden.

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Title: Resistance to Gremmeniella abietina (European race, large tree type) in introduced Pinus contorta and native Pinus sylvestris in Sweden.
Authors: Bernhold, Andreas, Hansson, Per, Rioux, Danny, Simard, Marie, Laflamme, Gaston
Source: Canadian Journal of Forest Research. Jan2009, Vol. 39 Issue 1, p89-96. 7p. 4 Black and White Photographs, 3 Graphs.
Subject Terms: *Disease resistance of plants, *Seedlings, Gremmeniella abietina, Botany experiments, Lodgepole pine, Scots pine, Histopathology
Geographic Terms: Sweden
Abstract (English): To study the resistance of Pinus contorta Dougl. ex Loud. var. latifolia Engelm. ex Watts to large tree type (LTT) Gremmeniella abietina (Lagerberg) Morelet of the European race, seedlings of P. contorta and Pinus sylvestris L. were planted in gaps of an infected 40-year-old P. sylvestris stand in 2005 and assessed for symptoms in 2006–2007. In 2007, 45% and 32% of the P. contorta and P. sylvestris seedlings were infected, respectively. However, mortality was lower and recovery was better in the P. contorta seedlings. The mean infection length on surviving seedlings was significantly shorter in P. contorta (4 cm) compared with P. sylvestris (10 cm), and 47% of the P. contorta seedlings had developed new leader shoots in 2007 compared with 19% of the P. sylvestris seedlings. Histopathological examinations of the transition zone of infected shoots showed that P. contorta, as well as P. sylvestris, produced ligno-suberized boundaries extending from healthy needle bases transversally across the shoots. Together with areas of phenol-filled cells, these boundaries completed the compartmentalization of the invaded outermost parts of a majority of the infected seedlings. Our results indicate that P. contorta is more resistant to LTT G. abietina than P. sylvestris. [ABSTRACT FROM AUTHOR]
Abstract (French): Afin d’étudier la résistance de Pinus contorta Dougl. ex Loud. var. latifolia Engelm. ex Watts au type grands arbres (TGA) de la race européenne de Gremmeniella abietina (Lagerberg) Morelet, des semis de P. contorta et de Pinus sylvestris L. furent plantés en 2005 dans des trouées à l’intérieur d’un peuplement infecté de P. sylvestris âgé de 40 ans. Les symptômes furent évalués en 2006–2007. En 2007, respectivement 45 % et 32 % des semis de P. contorta et de P. sylvestris furent infectés. Cependant, la mortalité était plus basse et la récupération meilleure chez les semis de P. contorta. La longueur moyenne des infections sur les semis survivants était significativement plus courte chez le P. contorta (4 cm) comparativement au P. sylvestris (10 cm), et 47 % des semis de P. contorta avaient développé de nouvelles pousses en 2007, comparativement à 19 % chez les semis de P. sylvestris. Des examens histopathologiques de la zone de transition des pousses infectées montrent que le P. contorta, comme le P. sylvestris, forment une barrière ligno-subéreuse s’étendant de la base des aiguilles saines transversalement à travers les pousses. Avec les cellules remplies de phénols, ces barrières complètent le compartimentage des parties envahies les plus distantes de la majorité des semis infectés. Nos résultats indiquent que le P. contorta est plus résistant au TGA de G. abietina que le P. sylvestris. [ABSTRACT FROM AUTHOR]
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
  Group: Ti
  Data: Resistance to Gremmeniella abietina (European race, large tree type) in introduced Pinus contorta and native Pinus sylvestris in Sweden.
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  Data: <searchLink fieldCode="AR" term="%22Bernhold%2C+Andreas%22">Bernhold, Andreas</searchLink><br /><searchLink fieldCode="AR" term="%22Hansson%2C+Per%22">Hansson, Per</searchLink><br /><searchLink fieldCode="AR" term="%22Rioux%2C+Danny%22">Rioux, Danny</searchLink><br /><searchLink fieldCode="AR" term="%22Simard%2C+Marie%22">Simard, Marie</searchLink><br /><searchLink fieldCode="AR" term="%22Laflamme%2C+Gaston%22">Laflamme, Gaston</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Canadian+Journal+of+Forest+Research%22">Canadian Journal of Forest Research</searchLink>. Jan2009, Vol. 39 Issue 1, p89-96. 7p. 4 Black and White Photographs, 3 Graphs.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Disease+resistance+of+plants%22">Disease resistance of plants</searchLink><br />*<searchLink fieldCode="DE" term="%22Seedlings%22">Seedlings</searchLink><br /><searchLink fieldCode="DE" term="%22Gremmeniella+abietina%22">Gremmeniella abietina</searchLink><br /><searchLink fieldCode="DE" term="%22Botany+experiments%22">Botany experiments</searchLink><br /><searchLink fieldCode="DE" term="%22Lodgepole+pine%22">Lodgepole pine</searchLink><br /><searchLink fieldCode="DE" term="%22Scots+pine%22">Scots pine</searchLink><br /><searchLink fieldCode="DE" term="%22Histopathology%22">Histopathology</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Sweden%22">Sweden</searchLink>
– Name: Abstract
  Label: Abstract (English)
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  Data: To study the resistance of Pinus contorta Dougl. ex Loud. var. latifolia Engelm. ex Watts to large tree type (LTT) Gremmeniella abietina (Lagerberg) Morelet of the European race, seedlings of P. contorta and Pinus sylvestris L. were planted in gaps of an infected 40-year-old P. sylvestris stand in 2005 and assessed for symptoms in 2006–2007. In 2007, 45% and 32% of the P. contorta and P. sylvestris seedlings were infected, respectively. However, mortality was lower and recovery was better in the P. contorta seedlings. The mean infection length on surviving seedlings was significantly shorter in P. contorta (4 cm) compared with P. sylvestris (10 cm), and 47% of the P. contorta seedlings had developed new leader shoots in 2007 compared with 19% of the P. sylvestris seedlings. Histopathological examinations of the transition zone of infected shoots showed that P. contorta, as well as P. sylvestris, produced ligno-suberized boundaries extending from healthy needle bases transversally across the shoots. Together with areas of phenol-filled cells, these boundaries completed the compartmentalization of the invaded outermost parts of a majority of the infected seedlings. Our results indicate that P. contorta is more resistant to LTT G. abietina than P. sylvestris. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label: Abstract (French)
  Group: Ab
  Data: Afin d’étudier la résistance de Pinus contorta Dougl. ex Loud. var. latifolia Engelm. ex Watts au type grands arbres (TGA) de la race européenne de Gremmeniella abietina (Lagerberg) Morelet, des semis de P. contorta et de Pinus sylvestris L. furent plantés en 2005 dans des trouées à l’intérieur d’un peuplement infecté de P. sylvestris âgé de 40 ans. Les symptômes furent évalués en 2006–2007. En 2007, respectivement 45 % et 32 % des semis de P. contorta et de P. sylvestris furent infectés. Cependant, la mortalité était plus basse et la récupération meilleure chez les semis de P. contorta. La longueur moyenne des infections sur les semis survivants était significativement plus courte chez le P. contorta (4 cm) comparativement au P. sylvestris (10 cm), et 47 % des semis de P. contorta avaient développé de nouvelles pousses en 2007, comparativement à 19 % chez les semis de P. sylvestris. Des examens histopathologiques de la zone de transition des pousses infectées montrent que le P. contorta, comme le P. sylvestris, forment une barrière ligno-subéreuse s’étendant de la base des aiguilles saines transversalement à travers les pousses. Avec les cellules remplies de phénols, ces barrières complètent le compartimentage des parties envahies les plus distantes de la majorité des semis infectés. Nos résultats indiquent que le P. contorta est plus résistant au TGA de G. abietina que le P. sylvestris. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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    Identifiers:
      – Type: doi
        Value: 10.1139/X08-157
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      – Code: eng
        Text: English
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        PageCount: 7
        StartPage: 89
    Subjects:
      – SubjectFull: Disease resistance of plants
        Type: general
      – SubjectFull: Seedlings
        Type: general
      – SubjectFull: Gremmeniella abietina
        Type: general
      – SubjectFull: Botany experiments
        Type: general
      – SubjectFull: Lodgepole pine
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      – SubjectFull: Scots pine
        Type: general
      – SubjectFull: Histopathology
        Type: general
      – SubjectFull: Sweden
        Type: general
    Titles:
      – TitleFull: Resistance to Gremmeniella abietina (European race, large tree type) in introduced Pinus contorta and native Pinus sylvestris in Sweden.
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            NameFull: Hansson, Per
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            NameFull: Rioux, Danny
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              Text: Jan2009
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