首页 | 本学科首页   官方微博 | 高级检索  
  按 检索      


Influence of potassium and sodium nutrition on leaf area components in Eucalyptus grandis trees
Authors:Patricia Battie-Laclau  Jean-Paul Laclau  Marisa de Cassia Piccolo  Bruna Cersózimo Arenque  Constance Beri  Lauriane Mietton  Marta R Almeida Muniz  Lionel Jordan-Meille  Marcos Silveira Buckeridge  Yann Nouvellon  Jacques Ranger  Jean-Pierre Bouillet
Institution:1. Universidade de S?o Paulo, CENA, 13400-970, Piracicaba, SP, Brazil
2. CIRAD, UMR Eco&Sols, 2 place Viala, 34060, Montpellier, France
3. UNESP, Natural Resources Department, Botucatu, SP, 18610-307, Brazil
4. Ecology Department, IB, Universidade de S?o Paulo, 05508-900, S?o Paulo, SP, Brazil
5. Ecole Supérieure d’Agriculture d’Angers, 49 007, Angers Cedex 01, France
6. AgroParisTech, 16 rue Claude Bernard, 75231, Paris Cedex 05, France
7. ESALQ, Biological Science Department, Universidade de S?o Paulo, 13418-900, Piracicaba, SP, Brazil
8. Université de Bordeaux, UMR 1220 TCEM, 33140, Villenave d’Ornon, France
9. Atmospheric Science Department, IAG, CEP, Universidade de S?o Paulo, 05508-900, S?o Paulo, SP, Brazil
10. INRA, UR Biogéochimie des Ecosystèmes Forestiers, 54280, Champenoux, France
11. Forest Science Department, Universidade de S?o Paulo, ESALQ, 13418-900, Piracicaba, SP, Brazil
Abstract:

Background and Aims

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.

Methods

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).

Results

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.

Conclusions

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.
Keywords:
本文献已被 SpringerLink 等数据库收录！
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号