Stomatal control during dessication in the resurrection plant Xerophyta humilis

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dc.contributor.advisorFarrant, Jill Men_ZA
dc.contributor.authorChireshe, Nyaradzoen_ZA
dc.date.accessioned2017-08-23T13:12:21Z
dc.date.available2017-08-23T13:12:21Z
dc.date.issued2007en_ZA
dc.date.updated2017-02-08T10:47:40Z
dc.description.abstractStomatal apertures on leaves of the resurrection plant Xerophyta humilis were monitored microscopically in order to characterize stomatal regulation during a dehydration time course. In addition, the effect of exogenous application of the stress hormone ABA on stomatal regulation was followed. X humilis stomatal regulation appears to be initially similar to that typical of desiccation sensitive plants, but differed in that stomata did not all close at once but at a slower rate to control the drying rate of the plant, this gave time for protection mechanisms to be laid down. The signal hormone ABA was found to have strong stomatal control on the adaxial surfaces of leaves but weak control on the abaxial leaf surfaces, thus it is difficult to say that ABA regulates the process until RWC of below 50%, where stomatal apertures open as a result of shrinkage of guard cells due to loss of water.en_ZA
dc.identifier.apacitationChireshe, N. (2007). <i>Stomatal control during dessication in the resurrection plant Xerophyta humilis</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/24964en_ZA
dc.identifier.chicagocitationChireshe, Nyaradzo. <i>"Stomatal control during dessication in the resurrection plant Xerophyta humilis."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2007. http://hdl.handle.net/11427/24964en_ZA
dc.identifier.citationChireshe, N. 2007. Stomatal control during dessication in the resurrection plant Xerophyta humilis. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Chireshe, Nyaradzo AB - Stomatal apertures on leaves of the resurrection plant Xerophyta humilis were monitored microscopically in order to characterize stomatal regulation during a dehydration time course. In addition, the effect of exogenous application of the stress hormone ABA on stomatal regulation was followed. X humilis stomatal regulation appears to be initially similar to that typical of desiccation sensitive plants, but differed in that stomata did not all close at once but at a slower rate to control the drying rate of the plant, this gave time for protection mechanisms to be laid down. The signal hormone ABA was found to have strong stomatal control on the adaxial surfaces of leaves but weak control on the abaxial leaf surfaces, thus it is difficult to say that ABA regulates the process until RWC of below 50%, where stomatal apertures open as a result of shrinkage of guard cells due to loss of water. DA - 2007 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2007 T1 - Stomatal control during dessication in the resurrection plant Xerophyta humilis TI - Stomatal control during dessication in the resurrection plant Xerophyta humilis UR - http://hdl.handle.net/11427/24964 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/24964
dc.identifier.vancouvercitationChireshe N. Stomatal control during dessication in the resurrection plant Xerophyta humilis. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2007 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/24964en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherBotanyen_ZA
dc.titleStomatal control during dessication in the resurrection plant Xerophyta humilisen_ZA
dc.typeBachelor Thesis
dc.type.qualificationlevelHonours
dc.type.qualificationnameBSc (Hons)en_ZA
uct.type.filetype
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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