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Water Use Patterns of Four Tropical Bamboo Species Assessed with Sap Flux Measurements

Bamboos are grasses (Poaceae) that are widespread in tropical and subtropical regions. We aimed at exploring water use patterns of four tropical bamboo species (Bambusa vulgaris, Dendrocalamus asper, Gigantochloa atroviolacea, and G. apus) with sap flux measurement techniques. Our approach included...

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Autores principales: Mei, Tingting, Fang, Dongming, Röll, Alexander, Niu, Furong, Hendrayanto, Hölscher, Dirk
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4703849/
https://www.ncbi.nlm.nih.gov/pubmed/26779233
http://dx.doi.org/10.3389/fpls.2015.01202
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author Mei, Tingting
Fang, Dongming
Röll, Alexander
Niu, Furong
Hendrayanto,
Hölscher, Dirk
author_facet Mei, Tingting
Fang, Dongming
Röll, Alexander
Niu, Furong
Hendrayanto,
Hölscher, Dirk
author_sort Mei, Tingting
collection PubMed
description Bamboos are grasses (Poaceae) that are widespread in tropical and subtropical regions. We aimed at exploring water use patterns of four tropical bamboo species (Bambusa vulgaris, Dendrocalamus asper, Gigantochloa atroviolacea, and G. apus) with sap flux measurement techniques. Our approach included three experimental steps: (1) a pot experiment with a comparison of thermal dissipation probes (TDPs), the stem heat balance (SHB) method and gravimetric readings using potted B. vulgaris culms, (2) an in situ calibration of TDPs with the SHB method for the four bamboo species, and (3) field monitoring of sap flux of the four bamboo species along with three tropical tree species (Gmelina arborea, Shorea leprosula, and Hevea brasiliensis) during a dry and a wet period. In the pot experiment, it was confirmed that the SHB method is well suited for bamboos but that TDPs need to be calibrated. In situ, species-specific parameters for such calibration formulas were derived. During field monitoring we found that some bamboo species reached high maximum sap flux densities. Across bamboo species, maximal sap flux density increased with decreasing culm diameter. In the diurnal course, sap flux densities in bamboos peaked much earlier than radiation and vapor pressure deficit (VPD), and also much earlier than sap flux densities in trees. There was a pronounced hysteresis between sap flux density and VPD in bamboos, which was less pronounced in trees. Three of the four bamboo species showed reduced sap flux densities at high VPD values during the dry period, which was associated with a decrease in soil moisture content. Possible roles of internal water storage, root pressure and stomatal sensitivity are discussed.
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spelling pubmed-47038492016-01-15 Water Use Patterns of Four Tropical Bamboo Species Assessed with Sap Flux Measurements Mei, Tingting Fang, Dongming Röll, Alexander Niu, Furong Hendrayanto, Hölscher, Dirk Front Plant Sci Plant Science Bamboos are grasses (Poaceae) that are widespread in tropical and subtropical regions. We aimed at exploring water use patterns of four tropical bamboo species (Bambusa vulgaris, Dendrocalamus asper, Gigantochloa atroviolacea, and G. apus) with sap flux measurement techniques. Our approach included three experimental steps: (1) a pot experiment with a comparison of thermal dissipation probes (TDPs), the stem heat balance (SHB) method and gravimetric readings using potted B. vulgaris culms, (2) an in situ calibration of TDPs with the SHB method for the four bamboo species, and (3) field monitoring of sap flux of the four bamboo species along with three tropical tree species (Gmelina arborea, Shorea leprosula, and Hevea brasiliensis) during a dry and a wet period. In the pot experiment, it was confirmed that the SHB method is well suited for bamboos but that TDPs need to be calibrated. In situ, species-specific parameters for such calibration formulas were derived. During field monitoring we found that some bamboo species reached high maximum sap flux densities. Across bamboo species, maximal sap flux density increased with decreasing culm diameter. In the diurnal course, sap flux densities in bamboos peaked much earlier than radiation and vapor pressure deficit (VPD), and also much earlier than sap flux densities in trees. There was a pronounced hysteresis between sap flux density and VPD in bamboos, which was less pronounced in trees. Three of the four bamboo species showed reduced sap flux densities at high VPD values during the dry period, which was associated with a decrease in soil moisture content. Possible roles of internal water storage, root pressure and stomatal sensitivity are discussed. Frontiers Media S.A. 2016-01-07 /pmc/articles/PMC4703849/ /pubmed/26779233 http://dx.doi.org/10.3389/fpls.2015.01202 Text en Copyright © 2016 Mei, Fang, Röll, Niu, Hendrayanto and Hölscher. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Mei, Tingting
Fang, Dongming
Röll, Alexander
Niu, Furong
Hendrayanto,
Hölscher, Dirk
Water Use Patterns of Four Tropical Bamboo Species Assessed with Sap Flux Measurements
title Water Use Patterns of Four Tropical Bamboo Species Assessed with Sap Flux Measurements
title_full Water Use Patterns of Four Tropical Bamboo Species Assessed with Sap Flux Measurements
title_fullStr Water Use Patterns of Four Tropical Bamboo Species Assessed with Sap Flux Measurements
title_full_unstemmed Water Use Patterns of Four Tropical Bamboo Species Assessed with Sap Flux Measurements
title_short Water Use Patterns of Four Tropical Bamboo Species Assessed with Sap Flux Measurements
title_sort water use patterns of four tropical bamboo species assessed with sap flux measurements
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4703849/
https://www.ncbi.nlm.nih.gov/pubmed/26779233
http://dx.doi.org/10.3389/fpls.2015.01202
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