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Your search keyword '"Lauriane Mietton"' showing total 2 results
Start Over Author "Lauriane Mietton" Topic botany
2 results on '"Lauriane Mietton"'

1. Photosynthetic and anatomical responses ofEucalyptus grandisleaves to potassium and sodium supply in a field experiment

Author

Marta R. Almeida Muniz, Jean-Paul Laclau, Constance Beri, Lionel Jordan-Meille, Bruna C. Arenque, Marisa de Cássia Piccolo, Patricia Battie-Laclau, Yann Nouvellon, Lauriane Mietton, and Jean-Pierre Bouillet

Subjects
0106 biological sciences, 0303 health sciences, Stomatal conductance, Specific leaf area, Physiology, Potassium, Sodium, chemistry.chemical_element, Plant Science, 15. Life on land, Biology, Photosynthesis, 01 natural sciences, Photosynthetic capacity, 03 medical and health sciences, Horticulture, chemistry.chemical_compound, Nutrient, chemistry, Chlorophyll, Botany, 030304 developmental biology, 010606 plant biology & botany
Abstract

Although vast areas in tropical regions have weathered soils with low potassium (K) levels, little is known about the effects of K supply on the photosynthetic physiology of trees. This study assessed the effects of K and sodium (Na) supply on the diffusional and biochemical limitations to photosynthesis in Eucalyptus grandis leaves. A field experiment comparing treatments receiving K (+K) or Na (+Na) with a control treatment (C) was set up in a K-deficient soil. The net CO2 assimilation rates were twice as high in +K and 1.6 times higher in +Na than in the C as a result of lower stomatal and mesophyll resistance to CO2 diffusion and higher photosynthetic capacity. The starch content was higher and soluble sugar was lower in +K than in C and +Na, suggesting that K starvation disturbed carbon storage and transport. The specific leaf area, leaf thickness, parenchyma thickness, stomatal size and intercellular air spaces increased in +K and +Na compared to C. Nitrogen and chlorophyll concentrations were also higher in +K and +Na than in C. These results suggest a strong relationship between the K and Na supply to E. grandis trees and the functional and structural limitations to CO2 assimilation rates.

Published
2013

2. Influence of potassium and sodium nutrition on leaf area components in Eucalyptus grandis trees

Author

Constance Beri, Lionel Jordan-Meille, Lauriane Mietton, Jean-Paul Laclau, Patricia Battie-Laclau, Marta R. Almeida Muniz, Bruna C. Arenque, Jean-Pierre Bouillet, Yann Nouvellon, Marcos Silveira Buckeridge, Jacques Ranger, Marisa de Cássia Piccolo, University of São Paulo (USP), Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols), Institut National de la Recherche Agronomique (INRA)-Institut de Recherche pour le Développement (IRD)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Universidade Estadual Paulista Júlio de Mesquita Filho [São José do Rio Preto] (UNESP), Abeilles et Environnement (AE), Institut National de la Recherche Agronomique (INRA)-Avignon Université (AU), Ecole Supérieure d'Agriculture (Groupe ESA), AgroParisTech, Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB), Unité de recherche Biogéochimie des Ecosystèmes Forestiers (BEF), Institut National de la Recherche Agronomique (INRA), Ecologie Fonctionnelle et Biogéochimie des Sols (Eco&Sols), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA), Universidade Estadual Paulista Júlio de Mesquita Filho = São Paulo State University (UNESP), and Ecole Nationale Supérieure Agronomique de Montpellier (ENSA M)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)

Subjects
0106 biological sciences, leaf area, leaf longevity, [SDV]Life Sciences [q-bio], Turgor pressure, F62 - Physiologie végétale - Croissance et développement, Plant Science, leaf lifespan, 01 natural sciences, Palisade cell, Nutrient, expansion, Plant physiology, Surface foliaire, food and beverages, 04 agricultural and veterinary sciences, Analyse de tissu foliaire, Eucalyptus, Plantation forestière, DESENVOVIMENTO VEGETAL, cell turgor, cell size, Horticulture, Eucalyptus grandis, Sodium, Soil Science, chemistry.chemical_element, Biology, Fertilisation, osmotic potential, Abscission, Fertilité du sol, Botany, Na, Sugar, Croissance, soluble sugars, nutrient, fungi, 15. Life on land, K10 - Production forestière, chemistry, 040103 agronomy & agriculture, Potassium, 0401 agriculture, forestry, and fisheries, 010606 plant biology & botany, F04 - Fertilisation
Abstract

[b]Background and Aims[/b][br/]Recent studies showed a positive tree response to Na addition in K-depleted tropical soils. Our study aimed to gain insight into the effects of K and Na fertilizations on leaf area components for a widely planted tree species.[br/][br/][b]Methods[/b][br/]Leaf expansion rates, as well as nutrient, polyol and soluble sugar concentrations, were measured from emergence to abscission of tagged leaves in 1-year-old Eucalyptus grandis plantations. Leaf cell size and water status parameters were compared 1 and 2 months after leaf emergence in plots with KCl application (+K), NaCl application (+Na) and control plots (C).[br/][br/][b]Results[/b][br/]K and Na applications enhanced tree leaf area by increasing both leaf longevity and the mean area of individual leaves. Higher cell turgor in treatments +K and +Na than in the C treatment resulting from higher concentrations of osmotica contributed to increasing both palisade cell diameters and the size of fully expanded leaves.[br/][br/][b]Conclusions[/b][br/]Intermediate total tree leaf area in treatment +Na compared to treatments C and +K might result from the capacity of Na to substitute K in osmoregulatory functions, whereas it seemed unable to accomplish other important K functions that contribute to delaying leaf senescence.

Published
2013

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