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Cold hardiness in plants: molecular genetics, cell biology and physiology. Seventh International Plant Cold Hardiness Seminar, Sapporo, Japan, 10-15 July 2004.

Book cover for Cold hardiness in plants: molecular genetics, cell biology and physiology. Seventh International Plant Cold Hardiness Seminar, Sapporo, Japan, 10-15 July 2004.

Description

This book contains 16 papers presenting the latest research findings on plant freezing and chilling stress from major laboratories around the world. They focus on various aspects of molecular genetics and, in many cases, the use of transgenic plants to further our understanding of plant cold hardiness at the molecular level. Other papers include: vernalization genes in winter cereals; global analy...

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Chapter 15 (Page no: 219)

Dehydration in model membranes and protoplasts: contrasting effects at low, intermediate and high hydrations.

Upon studying the effects of dehydration on model membranes and protoplasts at low (water potentials less than -60 MPa), intermediate (water potentials between -6 and -60 MPa) and high hydration levels (water potentials between 0 and -6 MPa), results showed that sugars can exert several different protective effects in dehydrating systems. At high hydrations, sugars have osmotic effects that enable cells to resist water loss in the face of dehydrating environments. Sugars also contribute to the freezing-point depression of cellular solutions, which may facilitate survival of mild subzero temperatures. There is also evidence that sugars can act as scavengers of free radicals, which may be generated during episodes of dehydration stress. At intermediate and low hydrations, the protective role of sugars is likely to be more physical than physiological. The protection afforded by sugars is due to their ability to act as volumetric spacers that hinder the close approach of membranes and other surfaces and thereby, diminish the physical stresses that would otherwise damage cellular structures.

Other chapters from this book

Chapter: 1 (Page no: 1) Global analysis of gene networks to solve complex abiotic stress responses. Author(s): Shinozaki, K. Yamaguchi-Shinozaki, K.
Chapter: 2 (Page no: 11) The CBF cold response pathways of Arabidopsis and tomato. Author(s): Vogel, J. T. Cook, D. Fowler, S. G. Thomashow, M. F.
Chapter: 3 (Page no: 30) Barley contains a large CBF gene family associated with quantitative cold-tolerance traits. Author(s): Skinner, J. S. Zitzewitz, J. von Marquez-Cedillo, L. Filichkin, T. Szűcs, P. Amundsen, K. Stockinger, E. J. Thomashow, M. F. Chen, T. H. H. Hayes, P. M.
Chapter: 4 (Page no: 53) Structural organization of barley CBF genes coincident with a QTL for cold hardiness. Author(s): Stockinger, E. J. Cheng, H. Skinner, J. S.
Chapter: 5 (Page no: 64) The genetic basis of vernalization responses in barley. Author(s): Cooper, L. L. D. Zitzewitz, J. von Skinner, J. S. Szűcs, P. Karsai, I. Francia, E. Stanca, A. M. Pecchioni, N. Laurie, D. A. Chen, T. H. H. Hayes, P. M.
Chapter: 6 (Page no: 76) Vernalization genes in winter cereals. Author(s): Kane, N. A. Danyluk, J. Sarhan, F.
Chapter: 7 (Page no: 88) A bulk segregant approach to identify genetic polymorphisms associated with cold tolerance in lucerne. Author(s): Castonguay, Y. Cloutier, J. Laberge, S. Bertrand, A. Michaud, R.
Chapter: 8 (Page no: 103) Ectopic overexpression of AtCBF1 in potato enhances freezing tolerance. Author(s): Pino, M. T. Skinner, J. S. Jeknić, Z. Park, E. J. Hayes, P. M. Chen, T. H. H.
Chapter: 9 (Page no: 124) Overexpression of a heat-inducible apx gene confers chilling tolerance to rice plants. Author(s): Sato, Y. Saruyama, H.
Chapter: 10 (Page no: 138) Physiological and morphological alterations associated with development of freezing tolerance in the moss Physcomitrella patens. Author(s): Minami, A. Nagao, M. Arakawa, K. Fujikawa, S. Takezawa, D.
Chapter: 11 (Page no: 153) Control of growth and cold acclimation in silver birch. Author(s): Aalto, M. K. Palva, E. T.
Chapter: 12 (Page no: 167) The role of the CBF-dependent signalling pathway in woody perennials. Author(s): Benedict, C. Skinner, J. S. Meng, R. Chang, Y. Bhalerao, R. Finn, C. Chen, T. H. H. Hurry, V.
Chapter: 13 (Page no: 181) Functional role of winter-accumulating proteins from mulberry tree in adaptation to winter-induced stresses. Author(s): Fujikawa, S. Ukaji, N. Nagao, M. Yamane, K. Takezawa, D. Arakawa, K.
Chapter: 14 (Page no: 203) The role of compatible solutes in plant freezing tolerance: a case study on raffinose. Author(s): Hincha, D. K. Zuther, E. Hundertmark, M. Heyer, A. G.
Chapter: 16 (Page no: 235) Effect of plasma membrane-associated proteins on acquisition of freezing tolerance in Arabidopsis thaliana. Author(s): Tominaga, Y. Nakagawara, C. Kawamura, Y. Uemura, M.