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dc.contributor.author
Singer, Thomas
dc.contributor.supervisor
Schymanski, Stanislaus J.
dc.contributor.supervisor
Or, Dani
dc.date.accessioned
2021-01-22T14:27:42Z
dc.date.available
2021-01-12T17:02:30Z
dc.date.available
2021-01-13T13:04:23Z
dc.date.available
2021-01-22T14:27:42Z
dc.date.issued
2017-01-13
dc.identifier.uri
http://hdl.handle.net/20.500.11850/461817
dc.identifier.doi
10.3929/ethz-b-000461817
dc.description.abstract
Stomata are portals in plant leaves that control gas exchange. The relation between stomatal aperture and gas exchange through the stomatal pore can be described by physical models derived from Fick’s first law of diffusion. A combination of gas exchange measurements and microscopical observations of stomatal openings was used to investigate the three core objectives of this study: I) How accurately do various formulations of stomatal conductance as a function of aperture, size and spacing of stomata reproduce bulk stomatal conductance obtained from leaf chamber measurements? II) What is the relation between maximum achievable stomatal conductance and metrics comprising stomatal density, length and guard cell width? III) Does small stomata size offer more rapid and accurate gas exchange control? A formulation of stomatal conductance should include resistance to diffusion along the pore, resistance to diffusion inside the substomatal cavity, resistance to diffusion across vapour shells and pore shape. Formulations of stomatal conductance based on morphological trait measurements should apply an elliptical pore shape instead of a circular cross sectional area. Our data show a negative correlation between pore length and maximum rates of opening and closing.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
ETH Zurich
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.subject
stomata
en_US
dc.subject
Stomatal aperture
en_US
dc.subject
stomatal conductance
en_US
dc.title
Physical and biological controls on leaf gas exchange
en_US
dc.type
Master Thesis
dc.rights.license
In Copyright - Non-Commercial Use Permitted
ethz.size
70 p.
en_US
ethz.code.ddc
DDC - DDC::5 - Science::580 - Botanical sciences
en_US
ethz.code.ddc
DDC - DDC::5 - Science::570 - Life sciences
en_US
ethz.publication.place
Zurich
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics
en_US
ethz.relation.isSupplementedBy
10.3929/ethz-b-000465748
ethz.date.deposited
2021-01-12T17:02:37Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-01-22T14:27:51Z
ethz.rosetta.lastUpdated
2021-01-22T14:27:51Z
ethz.rosetta.versionExported
true
ethz.COinS
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