Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/243814
Type: Artigo de periódico
Title: Hydraulic Architecture Of Lianas In A Semiarid Climate: Efficiency Or Safety?
Author: Dantas Carvalho
Ellen Cristina; Martins
Fernando Roberto; Soares
Arlete Aparecida; Oliveira
Rafael Silva; Muniz
Celli Rodrigues; Araujo
Francisca Soares
Abstract: Xylem anatomical traits can provide insights regarding the mechanisms affecting the distribution of vascular plants across environmental gradients. In this study, we aimed to investigate the hypothesis that lianas occurring in semiarid environments have characteristics that maximize the xylem resistance to tension-induced cavitation along the root-stem-branch continuum. To gather information regarding the hydraulic architecture of the lianas, we analyzed several anatomical traits of wood: cross-sectional area occupied by the parenchyma (A(p)), fibers (A(f)), and vessels (A(v)); average vessel diameter (d); wood density (WD); pit diameter in the vessel wall (d(pit)); pit density (N-pit), and potential hydraulic conductivity (Kp) in branches, stems, and roots of three congeneric species of lianas that occur in two vegetation types of the semiarid regions of Brazil. We found that lianas in these semiarid environments possess a number of the following xylem traits that may allow resistance to tension-induced cavitation: 1) lower vessel diameter, lower Kp, and higher hydraulic safety in roots and branches; 2) Dimorphic vessels, ensuring both hydraulic efficiency and safety; and 3) small diameter of pits (potentially associated with a decrease in the membrane area of the vessel pits). This suite of traits may provide insight into mechanisms allowing lianas to occur in semiarid environments.
Subject: Wood Density
Rain-forest
Water Relations
Bignonieae Bignoniaceae
Xylem Anatomy
Plants
Trees
Evolution
Transport
History
Country: SAO PAULO SP
Editor: SOC BOTANICA BRASIL
Citation: Hydraulic Architecture Of Lianas In A Semiarid Climate: Efficiency Or Safety?. Soc Botanica Brasil, v. 29, p. 198-206 APR-JUN-2015.
Rights: fechado
Identifier DOI: 10.1590/0102-33062014abb3754
Address: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200198&lng=en&nrm=iso&tlng=en
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
wos_000356078800004.pdf2.43 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.