caa a22 4500 606208534 CHVBK 20210128101023.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00425-015-2320-6 doi (NATIONALLICENCE)springer-10.1007/s00425-015-2320-6 A molecular physiological review of vegetative desiccation tolerance in the resurrection plant Xerophyta viscosa (Baker) [Elektronische Daten] [Jill Farrant, Keren Cooper, Amelia Hilgart, Kamal Abdalla, Joanne Bentley, Jennifer Thomson, Halford Dace, Nashied Peton, Sagadevan Mundree, Mohamed Rafudeen] Main conclusion : Provides a first comprehensive review of integrated physiological and molecular aspects of desiccation tolerance Xerophyta viscosa . A synopsis of biotechnological studies being undertaken to improve drought tolerance in maize is given. 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 3days 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. The Author(s), 2015 Physiology nationallicence Proteome nationallicence Resurrection plant nationallicence Transcriptome nationallicence Vegetative desiccation tolerance nationallicence ERD (LRD) : Early (Late) response to desiccation nationallicence Farrant Jill Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut Cooper Keren Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut Hilgart Amelia Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut Abdalla Kamal University of Gadarif, P.O. Box 449, 32211, Gadarif, Al Qadarif, Sudan aut Bentley Joanne Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut Thomson Jennifer Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut Dace Halford Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut Peton Nashied Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut Mundree Sagadevan Queensland University of Technology, PO Box 2434, 4001, Brisbane, QLD, Australia aut Rafudeen Mohamed Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut Planta Springer Berlin Heidelberg 242/2(2015-08-01), 407-426 0032-0935 242:2<407 2015 242 425 https://doi.org/10.1007/s00425-015-2320-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 review-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00425-015-2320-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Farrant Jill Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut NATIONALLICENCE 700 1- Cooper Keren Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut NATIONALLICENCE 700 1- Hilgart Amelia Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut NATIONALLICENCE 700 1- Abdalla Kamal University of Gadarif, P.O. Box 449, 32211, Gadarif, Al Qadarif, Sudan aut NATIONALLICENCE 700 1- Bentley Joanne Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut NATIONALLICENCE 700 1- Thomson Jennifer Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut NATIONALLICENCE 700 1- Dace Halford Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut NATIONALLICENCE 700 1- Peton Nashied Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut NATIONALLICENCE 700 1- Mundree Sagadevan Queensland University of Technology, PO Box 2434, 4001, Brisbane, QLD, Australia aut NATIONALLICENCE 700 1- Rafudeen Mohamed Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, 7701, Rondebosch, South Africa aut NATIONALLICENCE 773 0- Planta Springer Berlin Heidelberg 242/2(2015-08-01), 407-426 0032-0935 242:2<407 2015 242 425