A molecular physiological review of vegetative desiccation tolerance in the resurrection plant Xerophyta viscosa (Baker)

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dc.contributor.authorFarrant, Jill M
dc.contributor.authorCooper, Keren
dc.contributor.authorHilgart, Amelia
dc.contributor.authorAbdalla, Kamal O
dc.contributor.authorBentley, Joanne
dc.contributor.authorThomson, Jennifer Ann
dc.contributor.authorDace, Halford
dc.contributor.authorMundree, Sagadevan G
dc.contributor.authorRafudeen, Mohamed S
dc.coverage.spatialSouthern Africaen_ZA
dc.date.accessioned2015-07-30T20:23:59Z
dc.date.available2015-07-30T20:23:59Z
dc.date.issued2015-08
dc.description.abstractXerophyta viscosa (Baker) is a monocotyledonous resurrection plant from the family Vellociacea that occurs in summer-rainfall areas of South Africa, Lesotho and Swaziland. It inhabits rocky terrain in exposed grasslands and frequently experiences periods of water deficit. Being a resurrection plant it tolerates the loss of 95 % of total cellular water, regaining full metabolic competency within 3 days of rehydration. In this paper, we review some of the molecular and physiological adaptations that occur during various stages of dehydration of X. viscosa, these being functionally grouped into early and late responses, which might be relevant to the attainment of desiccation tolerance. During early drying (to 55 % RWC) photosynthesis is shut down, there is increased presence and activity of housekeeping antioxidants and a redirection of metabolism to the increased formation of sucrose and raffinose family oligosaccharides. Other metabolic shifts suggest water replacement in vacuoles proposed to facilitate mechanical stabilization. Some regulatory processes observed include increased presence of a linker histone H1 variant, a Type 2C protein phosphatase, a calmodulin- and an ERD15-like protein. During the late stages of drying (to 10 % RWC) there was increased expression of several proteins involved in signal transduction, and retroelements speculated to be instrumental in gene silencing. There was induction of antioxidants not typically found in desiccation-sensitive systems, classical stress-associated proteins (HSP and LEAs), proteins involved in structural stabilization and those associated with changes in various metabolite pools during drying. Metabolites accumulated in this stage are proposed, inter alia, to facilitate subcellular stabilization by vitrification process which can include glass- and ionic liquid formation.en_ZA
dc.identifier.apacitationFarrant, J. M., Cooper, K., Hilgart, A., Abdalla, K. O., Bentley, J., Thomson, J. A., ... Rafudeen, M. S. (2015). A molecular physiological review of vegetative desiccation tolerance in the resurrection plant Xerophyta viscosa (Baker). <i>Planta</i>, http://hdl.handle.net/11427/13636en_ZA
dc.identifier.chicagocitationFarrant, Jill M, Keren Cooper, Amelia Hilgart, Kamal O Abdalla, Joanne Bentley, Jennifer Ann Thomson, Halford Dace, Sagadevan G Mundree, and Mohamed S Rafudeen "A molecular physiological review of vegetative desiccation tolerance in the resurrection plant Xerophyta viscosa (Baker)." <i>Planta</i> (2015) http://hdl.handle.net/11427/13636en_ZA
dc.identifier.citationFarrant, J.M., et al.(2015). A molecular physiological review of vegetative desiccation tolerance in the resurrection plant Xerophyta viscosa (Baker). Planta, 242(2): 407-426, DOI 10.1007/s00425-015-2320-6.en_ZA
dc.identifier.issn1432-2048en_ZA
dc.identifier.ris TY - Journal Article AU - Farrant, Jill M AU - Cooper, Keren AU - Hilgart, Amelia AU - Abdalla, Kamal O AU - Bentley, Joanne AU - Thomson, Jennifer Ann AU - Dace, Halford AU - Mundree, Sagadevan G AU - Rafudeen, Mohamed S AB - Xerophyta viscosa (Baker) is a monocotyledonous resurrection plant from the family Vellociacea that occurs in summer-rainfall areas of South Africa, Lesotho and Swaziland. It inhabits rocky terrain in exposed grasslands and frequently experiences periods of water deficit. Being a resurrection plant it tolerates the loss of 95 % of total cellular water, regaining full metabolic competency within 3 days of rehydration. In this paper, we review some of the molecular and physiological adaptations that occur during various stages of dehydration of X. viscosa, these being functionally grouped into early and late responses, which might be relevant to the attainment of desiccation tolerance. During early drying (to 55 % RWC) photosynthesis is shut down, there is increased presence and activity of housekeeping antioxidants and a redirection of metabolism to the increased formation of sucrose and raffinose family oligosaccharides. Other metabolic shifts suggest water replacement in vacuoles proposed to facilitate mechanical stabilization. Some regulatory processes observed include increased presence of a linker histone H1 variant, a Type 2C protein phosphatase, a calmodulin- and an ERD15-like protein. During the late stages of drying (to 10 % RWC) there was increased expression of several proteins involved in signal transduction, and retroelements speculated to be instrumental in gene silencing. There was induction of antioxidants not typically found in desiccation-sensitive systems, classical stress-associated proteins (HSP and LEAs), proteins involved in structural stabilization and those associated with changes in various metabolite pools during drying. Metabolites accumulated in this stage are proposed, inter alia, to facilitate subcellular stabilization by vitrification process which can include glass- and ionic liquid formation. DA - 2015-08 DB - OpenUCT DO - 10.1007/s00425-015-2320-6 DP - University of Cape Town J1 - Planta LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 SM - 1432-2048 T1 - A molecular physiological review of vegetative desiccation tolerance in the resurrection plant Xerophyta viscosa (Baker) TI - A molecular physiological review of vegetative desiccation tolerance in the resurrection plant Xerophyta viscosa (Baker) UR - http://hdl.handle.net/11427/13636 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/13636
dc.identifier.urihttp://dx.doi.org/10.1007/s00425-015-2320-6
dc.identifier.vancouvercitationFarrant JM, Cooper K, Hilgart A, Abdalla KO, Bentley J, Thomson JA, et al. A molecular physiological review of vegetative desiccation tolerance in the resurrection plant Xerophyta viscosa (Baker). Planta. 2015; http://hdl.handle.net/11427/13636.en_ZA
dc.languageengen_ZA
dc.publisherSpringeren_ZA
dc.publisher.departmentDepartment of Molecular and Cell Biologyen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_ZA
dc.sourcePlantaen_ZA
dc.source.urihttp://link.springer.com/journal/425
dc.titleA molecular physiological review of vegetative desiccation tolerance in the resurrection plant Xerophyta viscosa (Baker)en_ZA
dc.typeJournal Articleen_ZA
uct.subject.keywordsPhysiologyen_ZA
uct.subject.keywordsProteomeen_ZA
uct.subject.keywordsResurrection planten_ZA
uct.subject.keywordsTranscriptomeen_ZA
uct.subject.keywordsVegetative desiccation toleranceen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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