Interaction of drought- and pathogen-induced mortality in Norway spruce and scots pine
Pathogenic diseases frequently occur in drought-stressed trees. However, their contribution to the process of drought-induced mortality is poorly understood. We combined drought and stem inoculation treatments to study the physiological processes leading to drought-induced mortality in Norway spruce...
| Autores: | ; ; ; ; ; ; ; |
|---|---|
| Tipo de documento: | Artículo |
| Estado: | Published version |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universitat de Lleida (UdL) |
| Repositorio: | Repositori Obert UdL |
| OAI Identifier: | oai:repositori.udl.cat:10459.1/83499 |
| Acceso en línea: | https://doi.org/10.1111/pce.14360 http://hdl.handle.net/10459.1/83499 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | Carbon starvation Conifer Drought-induced tree death Hydraulic failure Necrotrophic pathogen Sapwood Circuits hidràulics Coníferes Carboni Microorganismes patògens |
| _version_ | 1878732598819160064 |
|---|---|
| author | Gómez‐Gallego, Mireia |
| author2 | Galiano, Lucia Martínez-Vilalta, Jordi Stenlid, Jan Capador-Barreto, Hernan D. Elfstrand, Malin Camarero Martínez, Jesús Julio Oliva Palau, Jonàs |
| author2_role | author author author author author author author |
| author_browse | Camarero Martínez, Jesús Julio Capador-Barreto, Hernan D. Elfstrand, Malin Galiano, Lucia Gómez‐Gallego, Mireia Martínez-Vilalta, Jordi Oliva Palau, Jonàs Stenlid, Jan |
| author_facet | Gómez‐Gallego, Mireia Galiano, Lucia Martínez-Vilalta, Jordi Stenlid, Jan Capador-Barreto, Hernan D. Elfstrand, Malin Camarero Martínez, Jesús Julio Oliva Palau, Jonàs |
| author_role | author |
| collection | Repositori Obert UdL |
| description | Pathogenic diseases frequently occur in drought-stressed trees. However, their contribution to the process of drought-induced mortality is poorly understood. We combined drought and stem inoculation treatments to study the physiological processes leading to drought-induced mortality in Norway spruce (Picea abies) and Scots pine (Pinus sylvestris) saplings infected with Heterobasidion annosum s.s. We analysed the saplings' water status, gas exchange, nonstructural carbohydrates (NSCs) and defence responses, and how they related to mortality. Saplings were followed for two growing seasons, including an artificially induced 3-month dormancy period. The combined drought and pathogen treatment significantly increased spruce mortality; however, no interaction between these stressors was observed in pine, although individually each stressor caused mortality. Our results suggest that pathogen infection decreased carbon reserves in spruce, reducing the capacity of saplings to cope with drought, resulting in increased mortality rates. Defoliation, relative water content and the starch concentration of needles were predictors of mortality in both species under drought and pathogen infection. Infection and drought stress create conflicting needs for carbon to compartmentalize the pathogen and to avoid turgor loss, respectively. Heterobasidion annosum reduces the functional sapwood area and shifts NSC allocation patterns, reducing the capacity of trees to cope with drought. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_4618006a7d85cb779a7fbcd07b2bb2bc |
| institution | Universitat de Lleida (UdL) |
| instname_str | Universitat de Lleida (UdL) |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:repositori.udl.cat:10459.1/83499 |
| publishDate | 2022 |
| publishDateSort | 2022 |
| publisher | WILEY |
| publisherStr | WILEY |
| reponame_str | Repositori Obert UdL |
| spelling | Interaction of drought- and pathogen-induced mortality in Norway spruce and scots pine Gómez‐Gallego, Mireia Galiano, Lucia Martínez-Vilalta, Jordi Stenlid, Jan Capador-Barreto, Hernan D. Elfstrand, Malin Camarero Martínez, Jesús Julio Oliva Palau, Jonàs Carbon starvation Conifer Drought-induced tree death Hydraulic failure Necrotrophic pathogen Sapwood Circuits hidràulics Coníferes Carboni Microorganismes patògens Pathogenic diseases frequently occur in drought-stressed trees. However, their contribution to the process of drought-induced mortality is poorly understood. We combined drought and stem inoculation treatments to study the physiological processes leading to drought-induced mortality in Norway spruce (Picea abies) and Scots pine (Pinus sylvestris) saplings infected with Heterobasidion annosum s.s. We analysed the saplings' water status, gas exchange, nonstructural carbohydrates (NSCs) and defence responses, and how they related to mortality. Saplings were followed for two growing seasons, including an artificially induced 3-month dormancy period. The combined drought and pathogen treatment significantly increased spruce mortality; however, no interaction between these stressors was observed in pine, although individually each stressor caused mortality. Our results suggest that pathogen infection decreased carbon reserves in spruce, reducing the capacity of saplings to cope with drought, resulting in increased mortality rates. Defoliation, relative water content and the starch concentration of needles were predictors of mortality in both species under drought and pathogen infection. Infection and drought stress create conflicting needs for carbon to compartmentalize the pathogen and to avoid turgor loss, respectively. Heterobasidion annosum reduces the functional sapwood area and shifts NSC allocation patterns, reducing the capacity of trees to cope with drought. Ministry of Science and Education of Spain; Svenska Forskningsradet Formas WILEY https://doi.org/10.1111/pce.14360 http://hdl.handle.net/10459.1/83499 |
| spellingShingle | Interaction of drought- and pathogen-induced mortality in Norway spruce and scots pine Gómez‐Gallego, Mireia Carbon starvation Conifer Drought-induced tree death Hydraulic failure Necrotrophic pathogen Sapwood Circuits hidràulics Coníferes Carboni Microorganismes patògens |
| status_str | publishedVersion |
| title | Interaction of drought- and pathogen-induced mortality in Norway spruce and scots pine |
| title_full | Interaction of drought- and pathogen-induced mortality in Norway spruce and scots pine |
| title_fullStr | Interaction of drought- and pathogen-induced mortality in Norway spruce and scots pine |
| title_full_unstemmed | Interaction of drought- and pathogen-induced mortality in Norway spruce and scots pine |
| title_short | Interaction of drought- and pathogen-induced mortality in Norway spruce and scots pine |
| title_sort | Interaction of drought- and pathogen-induced mortality in Norway spruce and scots pine |
| topic | Carbon starvation Conifer Drought-induced tree death Hydraulic failure Necrotrophic pathogen Sapwood Circuits hidràulics Coníferes Carboni Microorganismes patògens |
| topic_facet | Carbon starvation Conifer Drought-induced tree death Hydraulic failure Necrotrophic pathogen Sapwood Circuits hidràulics Coníferes Carboni Microorganismes patògens |
| url | https://doi.org/10.1111/pce.14360 http://hdl.handle.net/10459.1/83499 |