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dc.contributor.author
Chen, Ya-Jun
dc.contributor.author
Schnitzer, Stefan A.
dc.contributor.author
Zhang, Yong Jiang
dc.contributor.author
Fan, Ze Xin
dc.contributor.author
Goldstein, Guillermo Hernan
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dc.contributor.author
Tomlinson, Kyle W.
dc.contributor.author
Lin, Hua
dc.contributor.author
Zhang, Jiao Lin
dc.contributor.author
Cao, Kun Fang
dc.date.available
2018-11-23T17:41:49Z
dc.date.issued
2017-02
dc.identifier.citation
Chen, Ya-Jun; Schnitzer, Stefan A.; Zhang, Yong Jiang; Fan, Ze Xin; Goldstein, Guillermo Hernan; et al.; Physiological regulation and efficient xylem water transport regulate diurnal water and carbon balances of tropical lianas; Wiley Blackwell Publishing, Inc; Functional Ecology; 31; 2; 2-2017; 306-317
dc.identifier.issn
0269-8463
dc.identifier.uri
http://hdl.handle.net/11336/65013
dc.description.abstract
Tropical lianas deploy most of their leaves towards the top of the forest canopy, whereas trees exhibit a more stratified crown. Forest canopies are often exposed to hot and windy conditions, and how lianas cope with the extremely high transpirational demands under these environments remains unknown. We investigated stem hydraulic properties, leaf drought tolerance, diurnal changes in leaf and stem water potentials (Ψleaf and Ψstem), stomatal conductance (gs), photosynthetic rate, sap flow and stem native percentage loss of conductivity (PLC) for four liana species in a tropical forest in southwest China. Five co-occurring tree species were also selected for comparison. Lianas reached maximal transpiration at a relatively lower vapour pressure deficit (<1 kPa) than did co-occurring trees, suggesting vigorous photosynthesis during the morning. However, liana gs declined markedly over the day, with low gs at midday and afternoon. Lianas generally had higher stem sapwood-specific conductivity and maximum sap flux density but were less tolerant to drought-induced cavitation than were evergreen trees. Both lianas and trees lost leaf turgor in the top canopy at midday, but lianas lost leaf turgor earlier (∼2 h) than trees. Seven of eight species exhibited midday increases in PLC when xylem tensions were released to −0·3 to −0·5 MPa for PLC measurements. On average, lianas experienced high PLC (35·9%), along with a greater degree of disequilibrium between leaf and stem water potentials than trees (ΔΨstem–leaf: 1·37 MPa vs. 0·75 MPa) during the day. Earlier stomatal closure and efficient water transport may help lianas maintain higher Ψstem than trees despite having similar Ψleaf. Our results provide evidence that physiological regulation and efficient water transport mediate daily water relations in tropical lianas and may explain how lianas operate efficiently in tropical seasonal forests. Further studies involving a broader range of species are needed to confirm our findings.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Drought Tolerance
dc.subject
Hydraulic Properties
dc.subject
Sap Flow
dc.subject
Stomatal Regulation
dc.subject
Water Relations
dc.subject.classification
Otras Ciencias Biológicas
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Physiological regulation and efficient xylem water transport regulate diurnal water and carbon balances of tropical lianas
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-10-23T18:31:53Z
dc.journal.volume
31
dc.journal.number
2
dc.journal.pagination
306-317
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Chen, Ya-Jun. Chinese Academy of Sciences; República de China. University of Chinese Academy of Sciences; República de China
dc.description.fil
Fil: Schnitzer, Stefan A.. Marquette University; Estados Unidos
dc.description.fil
Fil: Zhang, Yong Jiang. Chinese Academy of Sciences; República de China
dc.description.fil
Fil: Fan, Ze Xin. Chinese Academy of Sciences; República de China
dc.description.fil
Fil: Goldstein, Guillermo Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. University of Miami; Estados Unidos
dc.description.fil
Fil: Tomlinson, Kyle W.. Chinese Academy of Sciences; República de China
dc.description.fil
Fil: Lin, Hua. Chinese Academy of Sciences; República de China
dc.description.fil
Fil: Zhang, Jiao Lin. Chinese Academy of Sciences; República de China
dc.description.fil
Fil: Cao, Kun Fang. Chinese Academy of Sciences; República de China. Guangxi University; República de China
dc.journal.title
Functional Ecology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1111/1365-2435.12724
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://besjournals.onlinelibrary.wiley.com/doi/abs/10.1111/1365-2435.12724
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