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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

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Autor(es):
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Battie-Laclau, Patricia [1] ; Laclau, Jean-Paul [2, 3] ; Piccolo, Marisa de Cassia [1] ; Arenque, Bruna Cersozimo [4] ; Beri, Constance [5] ; Mietton, Lauriane [6] ; Almeida Muniz, Marta R. [7] ; Jordan-Meille, Lionel [8] ; Buckeridge, Marcos Silveira [4] ; Nouvellon, Yann [2, 9] ; Ranger, Jacques [10] ; Bouillet, Jean-Pierre [2, 11]
Número total de Autores: 12
Afiliação do(s) autor(es):
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[1] Univ Sao Paulo, CENA, BR-13400970 Piracicaba, SP - Brazil
[2] CIRAD, UMR Eco&Sols, F-34060 Montpellier - France
[3] UNESP, Dept Nat Resources, BR-18610307 Botucatu, SP - Brazil
[4] Univ Sao Paulo, Dept Ecol, IB, BR-05508900 Sao Paulo - Brazil
[5] Ecole Super Agr Angers, F-49007 Angers 01 - France
[6] AgroParisTech, F-75231 Paris 05 - France
[7] Univ Sao Paulo, ESALQ, Dept Biol Sci, BR-13418900 Piracicaba, SP - Brazil
[8] Univ Bordeaux, UMR TCEM 1220, F-33140 Villenave Dornon - France
[9] Univ Sao Paulo, Dept Atmospher Sci, IAG, CEP, BR-05508900 Sao Paulo - Brazil
[10] INRA, UR Biogeochim Ecosyst Forestiers, F-54280 Champenoux - France
[11] Univ Sao Paulo, Dept Forest Sci, ESALQ, BR-13418900 Piracicaba, SP - Brazil
Número total de Afiliações: 11
Tipo de documento: Artigo Científico
Fonte: PLANT AND SOIL; v. 371, n. 1-2, p. 19-35, OCT 2013.
Citações Web of Science: 28
Resumo

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. 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). 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. 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. (AU)

Processo FAPESP: 10/50663-8 - Interações entre disponibilidade hídrica e potássica na eficiência de uso dos recursos em Eucalyptus grandis
Beneficiário:Patricia Renée Françoise Battie Laclau
Linha de fomento: Bolsas no Brasil - Doutorado