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Article: Analysis of different strategies adapted by two cassava cultivars in response to drought stress: ensuring survival or continuing growth

TitleAnalysis of different strategies adapted by two cassava cultivars in response to drought stress: ensuring survival or continuing growth
Authors
Issue Date2015
PublisherOxford University Press. The Journal's web site is located at http://jxb.oxfordjournals.org/
Citation
Journal of Experimental Botany, 2015, v. 66 n. 5, p. 1477-1488 How to Cite?
AbstractCassava is one of the most drought-tolerant crops, however, the underlying mechanism for its ability to survive and produce under drought remains obscure. In this study, two cassava cultivars, SC124 and Arg7, were treated by gradually reducing the soil water content. Their responses to the drought stress were examined through their morphological and physiological traits and isobaric tags for relative and absolute quantitation (iTRAQ)-based proteomic analysis. SC124 plants adapted a 'survival' mode under mild drought stress as evidenced by early stomatal closure and a reduction in the levels of various photosynthetic proteins and photosynthetic capacity, resulting in early growth quiescence. In contrast, Arg7 plants underwent senescence of older leaves but continued to grow, although at a reduced rate, under mild drought. SC124 plants were more capable of surviving prolonged severe drought than Arg7. The iTRAQ analysis identified over 5000 cassava proteins. Among the drought-responsive proteins identified in the study were an aquaporin, myo-inositol 1-phosphate synthases, and a number of proteins involved in the antioxidant systems and secondary metabolism. Many proteins that might play a role in signalling or gene regulation were also identified as drought-responsive proteins, which included several protein kinases, two 14-3-3 proteins, several RNA-binding proteins and transcription factors, and two histone deacetylases. Our study also supports the notion that linamarin might play a role in nitrogen reallocation in cassava under drought.
Persistent Identifierhttp://hdl.handle.net/10722/209731
ISSN
2015 Impact Factor: 5.677
2015 SCImago Journal Rankings: 2.798

 

DC FieldValueLanguage
dc.contributor.authorZhao, P-
dc.contributor.authorLiu, P-
dc.contributor.authorShao, J-
dc.contributor.authorLi, C-
dc.contributor.authorWang, B-
dc.contributor.authorGuo, X-
dc.contributor.authorYan, B-
dc.contributor.authorXia, Y-
dc.contributor.authorPeng, M-
dc.date.accessioned2015-05-14T03:28:17Z-
dc.date.available2015-05-14T03:28:17Z-
dc.date.issued2015-
dc.identifier.citationJournal of Experimental Botany, 2015, v. 66 n. 5, p. 1477-1488-
dc.identifier.issn0022-0957-
dc.identifier.urihttp://hdl.handle.net/10722/209731-
dc.description.abstractCassava is one of the most drought-tolerant crops, however, the underlying mechanism for its ability to survive and produce under drought remains obscure. In this study, two cassava cultivars, SC124 and Arg7, were treated by gradually reducing the soil water content. Their responses to the drought stress were examined through their morphological and physiological traits and isobaric tags for relative and absolute quantitation (iTRAQ)-based proteomic analysis. SC124 plants adapted a 'survival' mode under mild drought stress as evidenced by early stomatal closure and a reduction in the levels of various photosynthetic proteins and photosynthetic capacity, resulting in early growth quiescence. In contrast, Arg7 plants underwent senescence of older leaves but continued to grow, although at a reduced rate, under mild drought. SC124 plants were more capable of surviving prolonged severe drought than Arg7. The iTRAQ analysis identified over 5000 cassava proteins. Among the drought-responsive proteins identified in the study were an aquaporin, myo-inositol 1-phosphate synthases, and a number of proteins involved in the antioxidant systems and secondary metabolism. Many proteins that might play a role in signalling or gene regulation were also identified as drought-responsive proteins, which included several protein kinases, two 14-3-3 proteins, several RNA-binding proteins and transcription factors, and two histone deacetylases. Our study also supports the notion that linamarin might play a role in nitrogen reallocation in cassava under drought.-
dc.languageeng-
dc.publisherOxford University Press. The Journal's web site is located at http://jxb.oxfordjournals.org/-
dc.relation.ispartofJournal of Experimental Botany-
dc.rightsPre-print: Journal Title] ©: [year] [owner as specified on the article] Published by Oxford University Press [on behalf of xxxxxx]. All rights reserved. Pre-print (Once an article is published, preprint notice should be amended to): This is an electronic version of an article published in [include the complete citation information for the final version of the Article as published in the print edition of the Journal.] Post-print: This is a pre-copy-editing, author-produced PDF of an article accepted for publication in [insert journal title] following peer review. The definitive publisher-authenticated version [insert complete citation information here] is available online at: xxxxxxx [insert URL that the author will receive upon publication here].-
dc.titleAnalysis of different strategies adapted by two cassava cultivars in response to drought stress: ensuring survival or continuing growth-
dc.typeArticle-
dc.identifier.emailYan, B: yanbinai6017@gmail.com-
dc.identifier.authorityYan, B=rp01940-
dc.identifier.doi10.1093/jxb/eru507-
dc.identifier.hkuros251599-
dc.identifier.volume66-
dc.identifier.issue5-
dc.identifier.spage1477-
dc.identifier.epage1488-
dc.publisher.placeUnited Kingdom-

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