ROOT HYDRAULIC CONDUCTIVITY AND PHOTOSYNTHETIC CAPACITY OF EUCALYPT CLONAL CUTTINGS WITH ROOT MALFORMATION INDUCTIONS

• Published in: Ciência florestal Vol. 24; no. 2; pp. 277 - 287
• Main Authors: Fábio Afonso Mazzei Moura de Assis Figueiredo, José Geraldo de Araújo Carneiro, Ricardo Miguel Penchel, Eliemar Campostrini, José Tarcísio de Lima Thiebaut, Deborah Guerra Barroso
• Format: Journal Article
• Language: Portuguese
• Published: Universidade Federal de Santa Maria 01-06-2014
• Subjects: condutividade hidráulica; Eucalyptus spp; sistema radicular; trocas gasosas
• ISSN: 0103-9954; 1980-5098
• DOI: 10.5902/1980509814566

http://dx.doi.org/10.5902/1980509814566The gain reduction of wood biomass in trees has been assigned to root deformations even in the nursery phase. The objective of this work was the evaluation of the root system hydraulic conductivity, gas exchanges and photochemical efficiency of eucalypt clonal cuttings with and without root deformation inductions. The treatments were: 1) operational cuttings without root malformation inductions (grown according to the used methodology of Fibria Cellulose S.A.); 2) root deformation inductions. These inductions did not promote decrease in the root volume. However, the deformations brought reduction of the root system hydraulic conductivity. Lower photosynthetic rates were also observed along the day in the cuttings in the root deformed cuttings. This decreasing rate is connected to stomatal and non stomatal factors.