Scaling of photosynthesis and constitutive and induced volatile emissions with severity of leaf infection by rust fungus (Melampsora larici-populina) in Populus balsamifera var. suaveolens.
Identifieur interne : 000604 ( Main/Merge ); précédent : 000603; suivant : 000605Scaling of photosynthesis and constitutive and induced volatile emissions with severity of leaf infection by rust fungus (Melampsora larici-populina) in Populus balsamifera var. suaveolens.
Auteurs : Yifan Jiang [République populaire de Chine] ; Jiayan Ye [Estonie] ; Linda-Liisa Veromann [Estonie] ; Ülo Niinemets [Estonie]Source :
- Tree physiology [ 1758-4469 ] ; 2016.
Descripteurs français
- KwdFr :
- Adaptation physiologique (MeSH), Arbres (MeSH), Basidiomycota (croissance et développement), Biomasse (MeSH), Butadiènes (métabolisme), Composés organiques volatils (métabolisme), Feuilles de plante (croissance et développement), Feuilles de plante (microbiologie), Hémiterpènes (métabolisme), Maladies des plantes (microbiologie), Méthanol (métabolisme), Pentanes (métabolisme), Photosynthèse (MeSH), Populus (croissance et développement), Populus (microbiologie), Populus (métabolisme), Populus (physiologie), Salicylates (métabolisme), Stress physiologique (MeSH), Terpènes (métabolisme), Transduction du signal (MeSH), Voies et réseaux métaboliques (MeSH).
- MESH :
- croissance et développement : Basidiomycota, Feuilles de plante, Populus.
- microbiologie : Feuilles de plante, Maladies des plantes, Populus.
- métabolisme : Butadiènes, Composés organiques volatils, Hémiterpènes, Méthanol, Pentanes, Populus, Salicylates, Terpènes.
- physiologie : Populus.
- Adaptation physiologique, Arbres, Biomasse, Photosynthèse, Stress physiologique, Transduction du signal, Voies et réseaux métaboliques.
English descriptors
- KwdEn :
- Adaptation, Physiological (MeSH), Basidiomycota (growth & development), Biomass (MeSH), Butadienes (metabolism), Hemiterpenes (metabolism), Metabolic Networks and Pathways (MeSH), Methanol (metabolism), Pentanes (metabolism), Photosynthesis (MeSH), Plant Diseases (microbiology), Plant Leaves (growth & development), Plant Leaves (microbiology), Populus (growth & development), Populus (metabolism), Populus (microbiology), Populus (physiology), Salicylates (metabolism), Signal Transduction (MeSH), Stress, Physiological (MeSH), Terpenes (metabolism), Trees (MeSH), Volatile Organic Compounds (metabolism).
- MESH :
- chemical , metabolism : Butadienes, Hemiterpenes, Methanol, Pentanes, Salicylates, Terpenes, Volatile Organic Compounds.
- growth & development : Basidiomycota, Plant Leaves, Populus.
- metabolism : Populus.
- microbiology : Plant Diseases, Plant Leaves, Populus.
- physiology : Populus.
- Adaptation, Physiological, Biomass, Metabolic Networks and Pathways, Photosynthesis, Signal Transduction, Stress, Physiological, Trees.
Abstract
Fungal infections result in decreases in photosynthesis, induction of stress and signaling volatile emissions and reductions in constitutive volatile emissions, but the way different physiological processes scale with the severity of infection is poorly known. We studied the effects of infection by the obligate biotrophic fungal pathogen Melampsora larici-populina Kleb., the causal agent of poplar leaf rust disease, on photosynthetic characteristics, and constitutive isoprene and induced volatile emissions in leaves of Populus balsamifera var. suaveolens (Fisch.) Loudon. exhibiting different degrees of damage. The degree of fungal damage, quantified by the total area of chlorotic and necrotic leaf areas, varied between 0 (noninfected control) and ∼60%. The rates of all physiological processes scaled quantitatively with the degree of visual damage, but the scaling with damage severity was weaker for photosynthetic characteristics than for constitutive and induced volatile release. Over the whole range of damage severity, the net assimilation rate per area (AA) decreased 1.5-fold, dry mass per unit area 2.4-fold and constitutive isoprene emissions 5-fold, while stomatal conductance increased 1.9-fold and dark respiration rate 1.6-fold. The emissions of key stress and signaling volatiles (methanol, green leaf volatiles, monoterpenes, sesquiterpenes and methyl salicylate) were in most cases nondetectable in noninfested leaves, and increased strongly with increasing the spread of infection. The moderate reduction in AA resulted from the loss of photosynthetically active biomass, but the reduction in constitutive isoprene emissions and the increase in induced volatile emissions primarily reflected changes in the activities of corresponding biochemical pathways. Although all physiological alterations in fungal-infected leaves occurred in a stress severity-dependent manner, modifications in primary and secondary metabolic pathways scaled differently due to contrasting operational mechanisms.
DOI: 10.1093/treephys/tpw035
PubMed: 27225874
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uniqKey="Ye J" first="Jiayan" last="Ye">Jiayan Ye</name><affiliation wicri:level="1"><nlm:affiliation>Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu 51014, Estonia.</nlm:affiliation><country xml:lang="fr">Estonie</country><wicri:regionArea>Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu 51014</wicri:regionArea><wicri:noRegion>Tartu 51014</wicri:noRegion></affiliation></author><author><name sortKey="Veromann, Linda Liisa" sort="Veromann, Linda Liisa" uniqKey="Veromann L" first="Linda-Liisa" last="Veromann">Linda-Liisa Veromann</name><affiliation wicri:level="1"><nlm:affiliation>Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu 51014, Estonia.</nlm:affiliation><country xml:lang="fr">Estonie</country><wicri:regionArea>Institute of Agricultural and Environmental Sciences, Estonian University of Life 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(metabolism)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Adaptation physiologique (MeSH)</term><term>Arbres (MeSH)</term><term>Basidiomycota (croissance et développement)</term><term>Biomasse (MeSH)</term><term>Butadiènes (métabolisme)</term><term>Composés organiques volatils (métabolisme)</term><term>Feuilles de plante (croissance et développement)</term><term>Feuilles de plante (microbiologie)</term><term>Hémiterpènes (métabolisme)</term><term>Maladies des plantes (microbiologie)</term><term>Méthanol (métabolisme)</term><term>Pentanes (métabolisme)</term><term>Photosynthèse (MeSH)</term><term>Populus (croissance et développement)</term><term>Populus (microbiologie)</term><term>Populus (métabolisme)</term><term>Populus (physiologie)</term><term>Salicylates (métabolisme)</term><term>Stress physiologique (MeSH)</term><term>Terpènes (métabolisme)</term><term>Transduction du signal (MeSH)</term><term>Voies et réseaux métaboliques (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Butadienes</term><term>Hemiterpenes</term><term>Methanol</term><term>Pentanes</term><term>Salicylates</term><term>Terpenes</term><term>Volatile Organic Compounds</term></keywords><keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Basidiomycota</term><term>Feuilles de plante</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Basidiomycota</term><term>Plant Leaves</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr"><term>Feuilles de plante</term><term>Maladies des plantes</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Plant Diseases</term><term>Plant Leaves</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Butadiènes</term><term>Composés organiques volatils</term><term>Hémiterpènes</term><term>Méthanol</term><term>Pentanes</term><term>Populus</term><term>Salicylates</term><term>Terpènes</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Populus</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adaptation, Physiological</term><term>Biomass</term><term>Metabolic Networks and Pathways</term><term>Photosynthesis</term><term>Signal Transduction</term><term>Stress, Physiological</term><term>Trees</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Adaptation physiologique</term><term>Arbres</term><term>Biomasse</term><term>Photosynthèse</term><term>Stress physiologique</term><term>Transduction du signal</term><term>Voies et réseaux métaboliques</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Fungal infections result in decreases in photosynthesis, induction of stress and signaling volatile emissions and reductions in constitutive volatile emissions, but the way different physiological processes scale with the severity of infection is poorly known. We studied the effects of infection by the obligate biotrophic fungal pathogen Melampsora larici-populina Kleb., the causal agent of poplar leaf rust disease, on photosynthetic characteristics, and constitutive isoprene and induced volatile emissions in leaves of Populus balsamifera var. suaveolens (Fisch.) Loudon. exhibiting different degrees of damage. The degree of fungal damage, quantified by the total area of chlorotic and necrotic leaf areas, varied between 0 (noninfected control) and ∼60%. The rates of all physiological processes scaled quantitatively with the degree of visual damage, but the scaling with damage severity was weaker for photosynthetic characteristics than for constitutive and induced volatile release. Over the whole range of damage severity, the net assimilation rate per area (AA) decreased 1.5-fold, dry mass per unit area 2.4-fold and constitutive isoprene emissions 5-fold, while stomatal conductance increased 1.9-fold and dark respiration rate 1.6-fold. The emissions of key stress and signaling volatiles (methanol, green leaf volatiles, monoterpenes, sesquiterpenes and methyl salicylate) were in most cases nondetectable in noninfested leaves, and increased strongly with increasing the spread of infection. The moderate reduction in AA resulted from the loss of photosynthetically active biomass, but the reduction in constitutive isoprene emissions and the increase in induced volatile emissions primarily reflected changes in the activities of corresponding biochemical pathways. Although all physiological alterations in fungal-infected leaves occurred in a stress severity-dependent manner, modifications in primary and secondary metabolic pathways scaled differently due to contrasting operational mechanisms.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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