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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Plant pneumatics: stem air flow is related to embolism - new perspectives on methods in plant hydraulics

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Author(s):
Pereira, Luciano [1] ; Bittencourt, Paulo R. L. [1] ; Oliveira, Rafael S. [1] ; Junior, Mauro B. M. [1] ; Barros, Fernanda V. [1] ; Ribeiro, Rafael V. [1] ; Mazzafera, Paulo [1]
Total Authors: 7
Affiliation:
[1] Univ Estadual Campinas, Inst Biol, Dept Plant Biol, POB 6109, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: NEW PHYTOLOGIST; v. 211, n. 1, p. 357-370, JUL 2016.
Web of Science Citations: 14
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. (AU)

FAPESP's process: 11/52072-0 - Soil-plant-atmosphere interactions in a changing tropical landscape
Grantee:Rafael Silva Oliveira
Support Opportunities: Research Grants - Research Partnership for Technological Innovation - PITE