Dielectric Relaxation of Water and Water-Plasticized Biomolecules in Relation to Cellular Water Organization, Cytoplasmic Viscosity, and Desiccation Tolerance in Recalcitrant Seed Tissues
To understand the relationship between the organization of cellular water, molecular interactions, and desiccation tolerance, dielectric behaviors of water and water-plasticized biomolecules in red oak (Quercus rubra) seeds were studied during dehydration. The thermally stimulated current study show...
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| Veröffentlicht in: | Plant physiology (Bethesda) 2000-11, Vol.124 (3), p.1203-1215 |
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| description | To understand the relationship between the organization of cellular water, molecular interactions, and desiccation tolerance, dielectric behaviors of water and water-plasticized biomolecules in red oak (Quercus rubra) seeds were studied during dehydration. The thermally stimulated current study showed three dielectric dispersions: (a) the relaxation of loosely-bound water and small polar groups, (b) the relaxation of tightly-bound water, carbohydrate chains, large polar groups of macromolecules, and (c) the "freezing in" of molecular mobility (glassy state). Seven discrete hydration levels (water contents of 1.40, 0.55, 0.41, 0.31, 0.21, 0.13, and 0.08 g/g dry weight, corresponding to -1.5, -8, -11, -14, -24, -74, and -195 MPa, respectively) were identified according to the changes in thermodynamic and dielectric properties of water and water-plasticized biomolecules during dehydration. The implications of intracellular water organization for desiccation tolerance were discussed. Cytoplasmic viscosity increased exponentially at water content < 0.40 g/g dry weight, which was correlated with the great relaxation slowdown of water-plasticized biomolecules, supporting a role for viscosity in metabolic shutdown during dehydration. |
| doi_str_mv | 10.1104/pp.124.3.1203 |
| format | Article |
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The thermally stimulated current study showed three dielectric dispersions: (a) the relaxation of loosely-bound water and small polar groups, (b) the relaxation of tightly-bound water, carbohydrate chains, large polar groups of macromolecules, and (c) the "freezing in" of molecular mobility (glassy state). Seven discrete hydration levels (water contents of 1.40, 0.55, 0.41, 0.31, 0.21, 0.13, and 0.08 g/g dry weight, corresponding to -1.5, -8, -11, -14, -24, -74, and -195 MPa, respectively) were identified according to the changes in thermodynamic and dielectric properties of water and water-plasticized biomolecules during dehydration. The implications of intracellular water organization for desiccation tolerance were discussed. Cytoplasmic viscosity increased exponentially at water content < 0.40 g/g dry weight, which was correlated with the great relaxation slowdown of water-plasticized biomolecules, supporting a role for viscosity in metabolic shutdown during dehydration.</description><identifier>ISSN: 0032-0889</identifier><identifier>EISSN: 1532-2548</identifier><identifier>DOI: 10.1104/pp.124.3.1203</identifier><identifier>PMID: 11080297</identifier><identifier>CODEN: PPHYA5</identifier><language>eng</language><publisher>Rockville, MD: American Society of Plant Physiologists</publisher><subject>Biological and medical sciences ; Biomolecules ; Biopolymers - physiology ; Carbohydrates - chemistry ; Cellular metabolism ; Cytoplasm - physiology ; Dehydration ; Depolarization ; Desiccation ; Dielectric materials ; Electricity ; Environmental Stress and Adaptation ; Fundamental and applied biological sciences. Psychology ; Intracellular Fluid - physiology ; Metabolism ; Moisture content ; Molecules ; Plant physiology and development ; Seeds ; Seeds - cytology ; Seeds - physiology ; Trees - cytology ; Trees - physiology ; Viscosity ; Water - physiology ; Water and solutes. Absorption, translocation and permeability</subject><ispartof>Plant physiology (Bethesda), 2000-11, Vol.124 (3), p.1203-1215</ispartof><rights>Copyright 2000 American Society of Plant Physiologists</rights><rights>2001 INIST-CNRS</rights><rights>Copyright © 2000, American Society of Plant Physiologists 2000</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c467t-3fcbfac647eca5737daebcc1afebce7b50296c82bb9e8e68236c0def00722f933</citedby><cites>FETCH-LOGICAL-c467t-3fcbfac647eca5737daebcc1afebce7b50296c82bb9e8e68236c0def00722f933</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/4279523$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/4279523$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>230,314,776,780,799,881,27903,27904,57995,58228</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=803343$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/11080297$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Sun, Wendell Q.</creatorcontrib><title>Dielectric Relaxation of Water and Water-Plasticized Biomolecules in Relation to Cellular Water Organization, Cytoplasmic Viscosity, and Desiccation Tolerance in Recalcitrant Seed Tissues</title><title>Plant physiology (Bethesda)</title><addtitle>Plant Physiol</addtitle><description>To understand the relationship between the organization of cellular water, molecular interactions, and desiccation tolerance, dielectric behaviors of water and water-plasticized biomolecules in red oak (Quercus rubra) seeds were studied during dehydration. The thermally stimulated current study showed three dielectric dispersions: (a) the relaxation of loosely-bound water and small polar groups, (b) the relaxation of tightly-bound water, carbohydrate chains, large polar groups of macromolecules, and (c) the "freezing in" of molecular mobility (glassy state). Seven discrete hydration levels (water contents of 1.40, 0.55, 0.41, 0.31, 0.21, 0.13, and 0.08 g/g dry weight, corresponding to -1.5, -8, -11, -14, -24, -74, and -195 MPa, respectively) were identified according to the changes in thermodynamic and dielectric properties of water and water-plasticized biomolecules during dehydration. The implications of intracellular water organization for desiccation tolerance were discussed. Cytoplasmic viscosity increased exponentially at water content < 0.40 g/g dry weight, which was correlated with the great relaxation slowdown of water-plasticized biomolecules, supporting a role for viscosity in metabolic shutdown during dehydration.</description><subject>Biological and medical sciences</subject><subject>Biomolecules</subject><subject>Biopolymers - physiology</subject><subject>Carbohydrates - chemistry</subject><subject>Cellular metabolism</subject><subject>Cytoplasm - physiology</subject><subject>Dehydration</subject><subject>Depolarization</subject><subject>Desiccation</subject><subject>Dielectric materials</subject><subject>Electricity</subject><subject>Environmental Stress and Adaptation</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Intracellular Fluid - physiology</subject><subject>Metabolism</subject><subject>Moisture content</subject><subject>Molecules</subject><subject>Plant physiology and development</subject><subject>Seeds</subject><subject>Seeds - cytology</subject><subject>Seeds - physiology</subject><subject>Trees - cytology</subject><subject>Trees - physiology</subject><subject>Viscosity</subject><subject>Water - physiology</subject><subject>Water and solutes. Absorption, translocation and permeability</subject><issn>0032-0889</issn><issn>1532-2548</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpVkU1v1DAQhi0EotvCkRtCkZA4NYu_8iVxgS1fUqUiWOBoOc6kuEriYDsV27_Gn2N2Ey1w8Vie931mPEPIE0bXjFH5chzXjMu1wJOKe2TFMsFTnsnyPllRindaltUJOQ3hhlLKBJMPyQk6S8qrYkV-X1jowERvTfIZOv1LR-uGxLXJdx3BJ3po5lv6qdMhWmPvoEneWNc7tE0dhMQOB-fBF12yga6bOu0XwJW_1oO9O6TPk80uuhFBPZb7ZoNxwcbd-aHKBQRrzIzZItzrwcAMN7ozNuJDTL4Alt_aECYIj8iDVncBHi_xjHx993a7-ZBeXr3_uHl9mRqZFzEVralbbXJZICgrRNFoqI1husUARZ3hJHJT8rquoIS85CI3tIGW0oLzthLijLyaueNU99AYGLCXTo3e9trvlNNW_Z8Z7A917W5VVnFWof3FYvfuJ7YdVY8_xynpAdwUVMElE7ksUZjOQuNdCB7aYwlG1X7ZahwVLlsJtV826p_929df9bJdFDxfBDrgDNv9SG046kpkyD3m6ay6CdH5Y1byosq4EH8AUCHCWQ</recordid><startdate>20001101</startdate><enddate>20001101</enddate><creator>Sun, Wendell Q.</creator><general>American Society of Plant Physiologists</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20001101</creationdate><title>Dielectric Relaxation of Water and Water-Plasticized Biomolecules in Relation to Cellular Water Organization, Cytoplasmic Viscosity, and Desiccation Tolerance in Recalcitrant Seed Tissues</title><author>Sun, Wendell Q.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c467t-3fcbfac647eca5737daebcc1afebce7b50296c82bb9e8e68236c0def00722f933</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>Biological and medical sciences</topic><topic>Biomolecules</topic><topic>Biopolymers - physiology</topic><topic>Carbohydrates - chemistry</topic><topic>Cellular metabolism</topic><topic>Cytoplasm - physiology</topic><topic>Dehydration</topic><topic>Depolarization</topic><topic>Desiccation</topic><topic>Dielectric materials</topic><topic>Electricity</topic><topic>Environmental Stress and Adaptation</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Intracellular Fluid - physiology</topic><topic>Metabolism</topic><topic>Moisture content</topic><topic>Molecules</topic><topic>Plant physiology and development</topic><topic>Seeds</topic><topic>Seeds - cytology</topic><topic>Seeds - physiology</topic><topic>Trees - cytology</topic><topic>Trees - physiology</topic><topic>Viscosity</topic><topic>Water - physiology</topic><topic>Water and solutes. Absorption, translocation and permeability</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sun, Wendell Q.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Plant physiology (Bethesda)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sun, Wendell Q.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dielectric Relaxation of Water and Water-Plasticized Biomolecules in Relation to Cellular Water Organization, Cytoplasmic Viscosity, and Desiccation Tolerance in Recalcitrant Seed Tissues</atitle><jtitle>Plant physiology (Bethesda)</jtitle><addtitle>Plant Physiol</addtitle><date>2000-11-01</date><risdate>2000</risdate><volume>124</volume><issue>3</issue><spage>1203</spage><epage>1215</epage><pages>1203-1215</pages><issn>0032-0889</issn><eissn>1532-2548</eissn><coden>PPHYA5</coden><abstract>To understand the relationship between the organization of cellular water, molecular interactions, and desiccation tolerance, dielectric behaviors of water and water-plasticized biomolecules in red oak (Quercus rubra) seeds were studied during dehydration. The thermally stimulated current study showed three dielectric dispersions: (a) the relaxation of loosely-bound water and small polar groups, (b) the relaxation of tightly-bound water, carbohydrate chains, large polar groups of macromolecules, and (c) the "freezing in" of molecular mobility (glassy state). Seven discrete hydration levels (water contents of 1.40, 0.55, 0.41, 0.31, 0.21, 0.13, and 0.08 g/g dry weight, corresponding to -1.5, -8, -11, -14, -24, -74, and -195 MPa, respectively) were identified according to the changes in thermodynamic and dielectric properties of water and water-plasticized biomolecules during dehydration. The implications of intracellular water organization for desiccation tolerance were discussed. Cytoplasmic viscosity increased exponentially at water content < 0.40 g/g dry weight, which was correlated with the great relaxation slowdown of water-plasticized biomolecules, supporting a role for viscosity in metabolic shutdown during dehydration.</abstract><cop>Rockville, MD</cop><pub>American Society of Plant Physiologists</pub><pmid>11080297</pmid><doi>10.1104/pp.124.3.1203</doi><tpages>13</tpages><oa>free_for_read</oa></addata></record> |
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| source | Jstor Complete Legacy; Oxford University Press Journals All Titles (1996-Current); MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Biological and medical sciences Biomolecules Biopolymers - physiology Carbohydrates - chemistry Cellular metabolism Cytoplasm - physiology Dehydration Depolarization Desiccation Dielectric materials Electricity Environmental Stress and Adaptation Fundamental and applied biological sciences. Psychology Intracellular Fluid - physiology Metabolism Moisture content Molecules Plant physiology and development Seeds Seeds - cytology Seeds - physiology Trees - cytology Trees - physiology Viscosity Water - physiology Water and solutes. Absorption, translocation and permeability |
| title | Dielectric Relaxation of Water and Water-Plasticized Biomolecules in Relation to Cellular Water Organization, Cytoplasmic Viscosity, and Desiccation Tolerance in Recalcitrant Seed Tissues |
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