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The Signature of Seeds in Resurrection Plants: A Molecular and Physiological Comparison of Desiccation Tolerance in Seeds and Vegetative Tissues

The Signature of Seeds in Resurrection Plants: A Molecular and Physiological Comparison of... Desiccation-tolerance in vegetative tissues of angiosperms has a polyphyletic origin and could be due to 1) appropriation of the seed-specific program of gene expression that protects orthodox seeds against desiccation, and/or 2) a sustainable version of the abiotic stress response. We tested these hypotheses by comparing molecular and physiological data from the development of orthodox seeds, the response of desiccation-sensitive plants to abiotic stress, and the response of desiccation-tolerant plants to extreme water loss. Analysis of publicly-available gene expression data of 35 LEA proteins and 68 anti-oxidant enzymes in the desiccation-sensitive Arabidopsis thaliana identified 13 LEAs and 4 anti-oxidants exclusively expressed in seeds. Two (a LEA6 and 1-cys-peroxiredoxin) are not expressed in vegetative tissues in A. thaliana , but have orthologues that are specifically activated in desiccating leaves of Xerophyta humilis . A comparison of antioxidant enzyme activity in two desiccation-sensitive species of Eragrostis with the desiccation-tolerant E. nindensis showed equivalent responses upon initial dehydration, but activity was retained at low water content in E. nindensis only. We propose that these antioxidants are housekeeping enzymes and that they are protected from damage in the desiccation-tolerant species. Sucrose is considered an important protectant against desiccation in orthodox seeds, and we show that sucrose accumulates in drying leaves of E. nindensis , but not in the desiccation-sensitive Eragrostis species. The activation of “seed-specific” desiccation protection mechanisms (sucrose accumulation and expression of LEA6 and 1-cys-peroxiredoxin genes) in the vegetative tissues of desiccation-tolerant plants points towards acquisition of desiccation tolerance from seeds. The Society for Integrative and Comparative Biology « Previous | Next Article » Table of Contents This Article Integr. Comp. Biol. (2005) 45 (5): 771-787. doi: 10.1093/icb/45.5.771 » Abstract Free Full Text (HTML) Free Full Text (PDF) Free Classifications Regular Article Services Article metrics Alert me when cited Alert me if corrected Find similar articles Similar articles in Web of Science Add to my archive Download citation Request Permissions Citing Articles Load citing article information Citing articles via CrossRef Citing articles via Scopus Citing articles via Web of Science Citing articles via Google Scholar Google Scholar Articles by Illing, N. Articles by Farrant, J. M. Search for related content Related Content Load related web page information Share Email this article CiteULike Delicious Facebook Google+ Mendeley Twitter What's this? Search this journal: Advanced » Current Issue November 2015 55 (5) Alert me to new issues The Journal About the journal Publishers' Books for Review Rights & Permissions Dispatch date of the next issue This journal is a member of the Committee on Publication Ethics (COPE) We are mobile – find out more Journals Career Network Impact factor: 2.929 5-Yr impact factor: 3.655 Published on behalf of The Society for Integrative and Comparative Biology Editor-in-Chief Harold Heatwole View full editorial board For Authors Services for authors Instructions to authors Charges Online submission Submit Now! Self-archiving policy Open access options for authors - visit Oxford Open Alerting Services Email table of contents Email Advance Access CiteTrack XML RSS feed Corporate Services What we offer Advertising sales Reprints Supplements var taxonomies = ("SCI00960"); Most Most Read The Ediacaran Biotas in Space and Time Polar Bears in a Warming Climate Causes and Consequences of Stress The relationship between egg size and fertilization success in broadcast-spawning marine invertebrates Mechanisms of Adhesion in Geckos » View all Most Read articles Most Cited Exceptional Fossil Preservation and the Cambrian Explosion Linking immune defenses and life history at the levels of the individual and the species Seminal influences: Drosophila Acps and the molecular interplay between males and females during reproduction Recent progress in understanding larval dispersal: new directions and digressions Grand challenges in organismal biology » View all Most Cited articles Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department. Online ISSN 1557-7023 - Print ISSN 1540-7063 Copyright © 2015 The Society for Integrative and Comparative Biology Oxford Journals Oxford University Press Site Map Privacy Policy Cookie Policy Legal Notices Frequently Asked Questions Other Oxford University Press sites: Oxford University Press Oxford Journals China Oxford Journals Japan Academic & Professional books Children's & Schools Books Dictionaries & Reference Dictionary of National Biography Digital Reference English Language Teaching Higher Education Textbooks International Education Unit Law Medicine Music Online Products & Publishing Oxford Bibliographies Online Oxford Dictionaries Online Oxford English Dictionary Oxford Language Dictionaries Online Oxford Scholarship Online Reference Rights and Permissions Resources for Retailers & Wholesalers Resources for the Healthcare Industry Very Short Introductions World's Classics function fnc_onDomLoaded() { var query_context = getQueryContext(); PF_initOIUnderbar(query_context,":QS:default","","JRN"); PF_insertOIUnderbar(0); }; if (window.addEventListener) { window.addEventListener('load', fnc_onDomLoaded, false); } else if (window.attachEvent) { window.attachEvent('onload', fnc_onDomLoaded); } var gaJsHost = (("https:" == document.location.protocol) ? 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The Signature of Seeds in Resurrection Plants: A Molecular and Physiological Comparison of Desiccation Tolerance in Seeds and Vegetative Tissues

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References (84)

Publisher
Oxford University Press
Copyright
Copyright © 2015 The Society for Integrative and Comparative Biology
ISSN
1540-7063
eISSN
1557-7023
DOI
10.1093/icb/45.5.771
pmid
21676829
Publisher site
See Article on Publisher Site

Abstract

Desiccation-tolerance in vegetative tissues of angiosperms has a polyphyletic origin and could be due to 1) appropriation of the seed-specific program of gene expression that protects orthodox seeds against desiccation, and/or 2) a sustainable version of the abiotic stress response. We tested these hypotheses by comparing molecular and physiological data from the development of orthodox seeds, the response of desiccation-sensitive plants to abiotic stress, and the response of desiccation-tolerant plants to extreme water loss. Analysis of publicly-available gene expression data of 35 LEA proteins and 68 anti-oxidant enzymes in the desiccation-sensitive Arabidopsis thaliana identified 13 LEAs and 4 anti-oxidants exclusively expressed in seeds. Two (a LEA6 and 1-cys-peroxiredoxin) are not expressed in vegetative tissues in A. thaliana , but have orthologues that are specifically activated in desiccating leaves of Xerophyta humilis . A comparison of antioxidant enzyme activity in two desiccation-sensitive species of Eragrostis with the desiccation-tolerant E. nindensis showed equivalent responses upon initial dehydration, but activity was retained at low water content in E. nindensis only. We propose that these antioxidants are housekeeping enzymes and that they are protected from damage in the desiccation-tolerant species. Sucrose is considered an important protectant against desiccation in orthodox seeds, and we show that sucrose accumulates in drying leaves of E. nindensis , but not in the desiccation-sensitive Eragrostis species. The activation of “seed-specific” desiccation protection mechanisms (sucrose accumulation and expression of LEA6 and 1-cys-peroxiredoxin genes) in the vegetative tissues of desiccation-tolerant plants points towards acquisition of desiccation tolerance from seeds. The Society for Integrative and Comparative Biology « Previous | Next Article » Table of Contents This Article Integr. Comp. Biol. (2005) 45 (5): 771-787. doi: 10.1093/icb/45.5.771 » Abstract Free Full Text (HTML) Free Full Text (PDF) Free Classifications Regular Article Services Article metrics Alert me when cited Alert me if corrected Find similar articles Similar articles in Web of Science Add to my archive Download citation Request Permissions Citing Articles Load citing article information Citing articles via CrossRef Citing articles via Scopus Citing articles via Web of Science Citing articles via Google Scholar Google Scholar Articles by Illing, N. Articles by Farrant, J. M. Search for related content Related Content Load related web page information Share Email this article CiteULike Delicious Facebook Google+ Mendeley Twitter What's this? Search this journal: Advanced » Current Issue November 2015 55 (5) Alert me to new issues The Journal About the journal Publishers' Books for Review Rights & Permissions Dispatch date of the next issue This journal is a member of the Committee on Publication Ethics (COPE) We are mobile – find out more Journals Career Network Impact factor: 2.929 5-Yr impact factor: 3.655 Published on behalf of The Society for Integrative and Comparative Biology Editor-in-Chief Harold Heatwole View full editorial board For Authors Services for authors Instructions to authors Charges Online submission Submit Now! Self-archiving policy Open access options for authors - visit Oxford Open Alerting Services Email table of contents Email Advance Access CiteTrack XML RSS feed Corporate Services What we offer Advertising sales Reprints Supplements var taxonomies = ("SCI00960"); Most Most Read The Ediacaran Biotas in Space and Time Polar Bears in a Warming Climate Causes and Consequences of Stress The relationship between egg size and fertilization success in broadcast-spawning marine invertebrates Mechanisms of Adhesion in Geckos » View all Most Read articles Most Cited Exceptional Fossil Preservation and the Cambrian Explosion Linking immune defenses and life history at the levels of the individual and the species Seminal influences: Drosophila Acps and the molecular interplay between males and females during reproduction Recent progress in understanding larval dispersal: new directions and digressions Grand challenges in organismal biology » View all Most Cited articles Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department. Online ISSN 1557-7023 - Print ISSN 1540-7063 Copyright © 2015 The Society for Integrative and Comparative Biology Oxford Journals Oxford University Press Site Map Privacy Policy Cookie Policy Legal Notices Frequently Asked Questions Other Oxford University Press sites: Oxford University Press Oxford Journals China Oxford Journals Japan Academic & Professional books Children's & Schools Books Dictionaries & Reference Dictionary of National Biography Digital Reference English Language Teaching Higher Education Textbooks International Education Unit Law Medicine Music Online Products & Publishing Oxford Bibliographies Online Oxford Dictionaries Online Oxford English Dictionary Oxford Language Dictionaries Online Oxford Scholarship Online Reference Rights and Permissions Resources for Retailers & Wholesalers Resources for the Healthcare Industry Very Short Introductions World's Classics function fnc_onDomLoaded() { var query_context = getQueryContext(); PF_initOIUnderbar(query_context,":QS:default","","JRN"); PF_insertOIUnderbar(0); }; if (window.addEventListener) { window.addEventListener('load', fnc_onDomLoaded, false); } else if (window.attachEvent) { window.attachEvent('onload', fnc_onDomLoaded); } var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-189672-16"); pageTracker._setDomainName(".oxfordjournals.org"); pageTracker._trackPageview(); } catch(err) {}

Journal

Integrative and Comparative BiologyOxford University Press

Published: Nov 1, 2005

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