| Full text | |
| Author(s): Show less - |
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]
Total Authors: 12
|
| Affiliation: Show less - | [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
Total Affiliations: 11
|
| Document type: | Journal article |
| Source: | PLANT AND SOIL; v. 371, n. 1-2, p. 19-35, OCT 2013. |
| Web of Science Citations: | 26 |
| Abstract | |
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) | |