Variation in pathogenicity among the three subspecies of<i><scp>P</scp>hytophthora alni</i>on detached leaves, twigs and branches of<i><scp>A</scp>lnus glutinosa</i>

Haque, Mohammed Masum Ul; Martín‐García, Jorge

doi:10.1111/efp.12198

Cited by 9 publications

(12 citation statements)

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“…This is not consistent with the findings of previous studies showing that P. xalni was the most aggressive subspecies, followed by P. xmultiformis, and that P. uniformis was only weakly pathogenic (Brasier & Kirk, 2001;De Merlier et al, 2005). Nevertheless, Santini et al (2003Santini et al ( , 2006 and Haque, Martín-García, and Diez (2015) demonstrated that P. uniformis caused aggressive damage to one-and two-year-old seedlings and detached twigs, respectively. Haque et al (2015) pointed out that the diameter of the plant material may be the most important parameter determining the virulence of P. uniformis.…”

Section: Discussioncontrasting

confidence: 97%

“…Nevertheless, Santini et al. (, ) and Haque, Martín‐García, and Diez () demonstrated that P. uniformis caused aggressive damage to one‐ and two‐year‐old seedlings and detached twigs, respectively. Haque et al.…”

Section: Discussionmentioning

confidence: 99%

“…Haque et al. () pointed out that the diameter of the plant material may be the most important parameter determining the virulence of P. uniformis . Our results are consistent with this suggestion and support the hypothesis that P. uniformis may become an aggressive pathogen in young sprouts and seedlings.…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, Santini et al (2003Santini et al ( , 2006 and Haque, Martín-García, and Diez (2015) demonstrated that P. uniformis caused aggressive damage to one-and two-year-old seedlings and detached twigs, respectively. Haque et al (2015) pointed out that the diameter of the plant material may be the most important parameter determining the virulence of P. uniformis.…”

Section: Discussionmentioning

confidence: 99%

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Pathogenicity of Phytophthora alni complex and P. plurivora in Alnus glutinosa seedlings

2016

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Summary The ecological importance of riparian forests is well known. However, these forest habitats have been disturbed by human activities over the past century as a result of the introduction of flow regulations. Mortality of the riparian alder population caused by Phytophthora has become an important issue in Europe in the past two decades. The main objective of this study was to examine the pathogenicity of the Phytophthora alni complex (P. xalni, P. uniformis and P. xmultiformis) and P. plurivora in Alnus glutinosa seedlings. Phytophthora alni complex has traditionally been identified as the main causal agent of alder decline; however, in this study, P. plurivora was found to cause as much damage in inoculated seedlings as P. alni complex. In fact, Spanish isolates of P. xalni caused mortality rates of ca. 30%, whereas P. plurivora killed ca. 50% of seedlings. Likewise, there were no differences between P. xalni ‐ and P. plurivora‐inoculated seedlings in either the length of lesion or biomass allocation. The pathogenicity of the species within P. alni complex did not differ significantly. The findings confirm that P. plurivora, which is one of the most common species of Phytophthora found in European nurseries, is highly pathogenic to alder seedlings. Urgent implementation of measures to prevent the risk of spread of the pathogen from nurseries to natural ecosystems is required. Further studies are required to clarify the role that P. plurivora is playing in alder decline both individually and in combination with P. alni complex.

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Section: Discussioncontrasting

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Pathogenicity of Phytophthora alni complex and P. plurivora in Alnus glutinosa seedlings

2016

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“…En la búsqueda de otros posibles test que produjeran una mayor discriminación, en Junio de 2017 se llevaron a cabo otros dos descritos por Haque et al (2015). Se realizó un test de inoculación de hojas, donde se midieron las lesiones producidas sobre el limbo de la hoja por un disco de micelio de P. xalni creciendo sobre V8 al cabo de los 11 días.…”

Section: Desarrollo De Mfr De Alnus Glutinosa Con Tolerancia a Phytopunclassified

El desarrollo de la sanidad forestal en el vivero de TRAGSA

Valera¹,

Leza²,

Luquero³

et al. 2017

Cuad. Soc. Esp. Cienc. For.

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Se presentan los trabajos que realiza el vivero de TRAGSA en el ámbito de la sanidad forestal, en cuanto al desarrollo de Materiales Forestales de Reproducción con tolerancia a enfermedades, en la producción de parasitoides para el control biológico de plagas forestales, y en el desarrollo de metodologías de teledetección para detección temprana, caracterización y seguimiento del estado fitosanitario de las masas forestales. Se describen los trabajos realizados y en curso al respecto de la obtención de MFR de castaño, de encina y alcornoque por tolerancia a Phytophthora cinnamomi, y de Alnus glutinosa por tolerancia a P. alni. Así mismo se presentan los trabajos de estudio de Torymus sinensis para la lucha biológica contra Dryocosmus kuriphilus, y de producción de Anaphes nitens para la lucha biológica contra Gonipterus platensis. Por último se comentan los trabajos realzados con RPAS para detección y seguimiento de Armillaria mellea en masa de Pinus pinaster.

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Pathogenicity of Phytophthora and Halophytophthora species on black alder and the host histological response

Vieites-Blanco,

Colangelo,

Camarero

et al. 2023

Mycol Progress

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Riparian alder forests are threatened by Phytophthora across Europe. Comparative studies of the pathogenicity of Phytophthora species are crucial for developing effective management strategies. Although only a limited number of species, particularly P. × alni, lead to tree decline in natural environments, many species demonstrate pathogenicity in inoculation trials. Phytophthora species vary in their ability to infect different tissues, such as phloem and xylem, and trigger defence responses in the host through the formation of tyloses and callose. By comparing the histological responses of alder to various Phytophthora species, we can gain insights into the success of P. × alni and the potential damage that could be caused by other species. To investigate the defence strategies of black alder (Alnus glutinosa) against attack by Phytophthora and Halophytophthora species present in Catalonia (NE Spain), we conducted inoculation trials on saplings using nine potentially pathogenic species and compared the histological responses. Phytophthora × alni and P. plurivora were the most aggressive species followed by other exotic species such as P. × cambivora and P. cactorum. Phytophthora × alni and P. plurivora were equally damaging despite the higher prevalence of P. × alni in declining alders in natural settings. Although P. × alni mainly invaded the phloem, P. plurivora also invaded the xylem and triggered the production of tyloses. Histological analyses revealed a diverse range of plant responses to infection by Phytophthora species, providing a better understanding of their adaptability in natural environments compared with solely observing lesions. The low level of callose production in saplings inoculated with P. × alni compared with callose production in saplings inoculated with less pathogenic species suggests that P. × alni can evade recognition by the host and, hence, could partially explain its success.

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Variation in pathogenicity among the three subspecies ofPhytophthora alnion detached leaves, twigs and branches ofAlnus glutinosa

Cited by 9 publications

References 32 publications

Pathogenicity of Phytophthora alni complex and P. plurivora in Alnus glutinosa seedlings

Pathogenicity of Phytophthora alni complex and P. plurivora in Alnus glutinosa seedlings

El desarrollo de la sanidad forestal en el vivero de TRAGSA

Pathogenicity of Phytophthora and Halophytophthora species on black alder and the host histological response

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