Per citar aquest document: https://ddd.uab.cat/record/179775
Scopus: 2 cites, Web of Science: 2 cites,
Osmolality and non-structural carbohydrate composition in the secondary phloem of trees across a latitudinal gradient in Europe
Lintunen, Anna (Helsingin yliopisto, Kirjasto. Department of Forest Sciences)
Paljakka, Teemu (Helsingin yliopisto, Kirjasto. Department of Forest Sciences)
Jyske, Tuula (Luonnonvarakeskus (Luke))
Peltoniemi, Mikko (Luonnonvarakeskus (Luke))
Sterck, Frank (Wageningen University. Forest Ecology and Forest Management Group)
Von Arx, Georg (Eidgenössische Forschungsanstalt für Wald, Schnee und Landschaft)
Cochard, Hervé (Institut national de la recherche agronomique (França))
Copini, Paul (Wageningen University. Forest Ecology and Forest Management Group)
Caldeira, Maria C. (Universidade de Lisboa. Centro de Estudos Florestais)
Delzon, Sylvain (Institut national de la recherche agronomique (França))
Gebauer, Roman (Mendelova zemědělská a lesnická univerzita v Brně. Department of Forest, Botany, Dendrology and Geobiocenology)
Grönlund, Leila (Helsingin yliopisto, Kirjasto. Department of Forest Sciences)
Kiorapostolou, Natasa (Wageningen University. Forest Ecology and Forest Management Group)
Lechthaler, Silvia (Università degli Studi di Padova. Dipartimento di Territorio e Sistemi Agro-Forestali)
Lobo-do-Vale, Raquel (Universidade de Lisboa. Centro de Estudos Florestais)
Peters, Richard L. (Eidgenössische Forschungsanstalt für Wald, Schnee und Landschaft)
Petit, Giai (Università degli Studi di Padova. Dipartimento di Territorio e Sistemi Agro-Forestali)
Prendin, Angela L. (Università degli Studi di Padova. Dipartimento di Territorio e Sistemi Agro-Forestali)
Salmon, Yann (Helsingin yliopisto, Kirjasto. Department of Physics)
Steppe, Kathy (Rijksuniversiteit te Gent. Laboratory of Plant Ecology)
Urban, Josef (Mendelova zemědělská a lesnická univerzita v Brně. Department of Forest, Botany, Dendrology and Geobiocenology)
Roig Juan, Sílvia (Luonnonvarakeskus (Luke))
Robert, Elisabeth M. R. (Centre de Recerca Ecològica i Aplicacions Forestals)
Hölttä, Teemu (Helsingin yliopisto, Kirjasto. Department of Forest Sciences)

Data: 2016
Resum: Phloem osmolality and its components are involved in basic cell metabolism, cell growth, and in various physiological processes including the ability of living cells to withstand drought and frost. Osmolality and sugar composition responses to environmental stresses have been extensively studied for leaves, but less for the secondary phloem of plant stems and branches. Leaf osmotic concentration and the share of pinitol and raffinose among soluble sugars increase with increasing drought or cold stress, and osmotic concentration is adjusted with osmoregulation. We hypothesize that similar responses occur in the secondary phloem of branches. We collected living bark samples from branches of adult Pinus sylvestris, Picea abies, Betula pendula and Populus tremula trees across Europe, from boreal Northern Finland to Mediterranean Portugal. In all studied species, the observed variation in phloem osmolality was mainly driven by variation in phloem water content, while tissue solute content was rather constant across regions. Osmoregulation, in which osmolality is controlled by variable tissue solute content, was stronger for Betula and Populus in comparison to the evergreen conifers. Osmolality was lowest in mid-latitude region, and from there increased by 37% toward northern Europe and 38% toward southern Europe due to low phloem water content in these regions. The ratio of raffinose to all soluble sugars was negligible at mid-latitudes and increased toward north and south, reflecting its role in cold and drought tolerance. For pinitol, another sugar known for contributing to stress tolerance, no such latitudinal pattern was observed. The proportion of sucrose was remarkably low and that of hexoses (i. e. , glucose and fructose) high at mid-latitudes. The ratio of starch to all non-structural carbohydrates increased toward the northern latitudes in agreement with the build-up of osmotically inactive C reservoir that can be converted into soluble sugars during winter acclimation in these cold regions. Present results for the secondary phloem of trees suggest that adjustment with tissue water content plays an important role in osmolality dynamics. Furthermore, trees acclimated to dry and cold climate showed high phloem osmolality and raffinose proportion.
Nota: COST Action FP1106 STReESS ; EU Life Programme (LIFE12 ENV/FI/000409 ; Ajut Marie Curie IF fellowship (No 659191)
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Llengua: Anglès
Document: article ; recerca ; publishedVersion
Matèria: Hexose ; Osmotic concentration ; Phloem water content ; Pinitol ; Raffinose ; Sucrose ; Starch
Publicat a: Frontiers in plant science, Vol. 7 (June 2016) , p. art. 726, ISSN 1664-462X

DOI: 10.3389/fpls.2016.00726
PMID: 27313582


15 p, 1.4 MB

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Articles > Articles de recerca
Articles > Articles publicats

 Registre creat el 2017-07-18, darrera modificació el 2017-10-12



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