Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/326303
Type: Artigo
Title: Plant Pneumatics: Stem Air Flow Is Related To Embolism - New Perspectives On Methods In Plant Hydraulics
Author: Pereira
Luciano; Bittencourt
Paulo R. L.; Oliveira
Rafael S.; Junior
Mauro B. M.; Barros
Fernanda V.; Ribeiro
Rafael V.; Mazzafera
Paulo
Abstract: Wood contains a large amount of air, even in functional xylem. Air embolisms in the xylem affect water transport and can determine plant growth and survival. Embolisms are usually estimated with laborious hydraulic methods, which can be prone to several artefacts. Here, we describe a new method for estimating embolisms that is based on air flow measurements of entire branches. To calculate the amount of air flowing out of the branch, a vacuum was applied to the cut bases of branches under different water potentials. We first investigated the source of air by determining whether it came from inside or outside the branch. Second, we compared embolism curves according to air flow or hydraulic measurements in 15 vessel- and tracheid-bearing species to test the hypothesis that the air flow is related to embolism. Air flow came almost exclusively from air inside the branch during the 2.5-min measurements and was strongly related to embolism. We propose a new embolism measurement method that is simple, effective, rapid and inexpensive, and that allows several measurements on the same branch, thus opening up new possibilities for studying plant hydraulics.
Subject: Cavitation
Drought
Plant Hydraulics
Water Transport
Xylem
Editor: Wiley-Blackwell
Hoboken
Rights: fechado
Identifier DOI: 10.1111/nph.13905
Address: http://onlinelibrary-wiley-com.ez88.periodicos.capes.gov.br/doi/10.1111/nph.13905/full
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
000379212800031.pdf1.55 MBAdobe PDFView/Open


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