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231225s2022 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erab440
|2 doi
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|a pubmed24n1104.xml
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|a DE-627
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|e rakwb
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|a eng
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|a Rajakani, Raja
|e verfasserin
|4 aut
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|a Reduced apoplastic barriers in tissues of shoot-proximal rhizomes of Oryza coarctata are associated with Na+ sequestration
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|c 2022
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 10.03.2022
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|a Date Revised 11.03.2022
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|a published: Print
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|a Citation Status MEDLINE
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|a © The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.
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|a Oryza coarctata is the only wild rice species with significant salinity tolerance. The present work examines the role of the substantial rhizomatous tissues of O. coarctata in conferring salinity tolerance. Transition to an erect phenotype (shoot emergence) from prostrate growth of rhizome tissues is characterized by marked lignification and suberization of supporting sclerenchymatous tissue, epidermis, and bundle sheath cells in aerial shoot-proximal nodes and internodes in O. coarctata. With salinity, however, aerial shoot-proximal internodal tissues show reductions in lignification and suberization, most probably related to re-direction of carbon flux towards synthesis of the osmporotectant proline. Concurrent with hypolignification and reduced suberization, the aerial rhizomatous biomass of O. coarctata appears to have evolved mechanisms to store Na+ in these specific tissues under salinity. This was confirmed by histochemical staining, quantitative real-time reverse transcription-PCR expression patterns of genes involved in lignification/suberization, Na+ and K+ contents of internodal tissues, as well as non-invasive microelectrode ion flux measurements of NaCl-induced net Na+, K+, and H+ flux profiles of aerial nodes were determined. In O. coarctata, aerial proximal internodes appear to act as 'traffic controllers', sending required amounts of Na+ and K+ into developing leaves for osmotic adjustment and turgor-driven growth, while more deeply positioned internodes assume a Na+ buffering/storage role
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Oryza coarctata
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|a CoroNa Green
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|a RT–qPCR
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|a lignification
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|a microelectrode ion flux (MIFE)
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|a rhizome
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|a sodium
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|a transporters
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|a Sodium
|2 NLM
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|a 9NEZ333N27
|2 NLM
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|a Sellamuthu, Gothandapani
|e verfasserin
|4 aut
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|a Ishikawa, Tetsuya
|e verfasserin
|4 aut
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|a Ahmed, Hassan Ahmed Ibraheem
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|4 aut
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|a Bharathan, Subhashree
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|a Kumari, Kumkum
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|a Shabala, Lana
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|a Zhou, Meixue
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|a Chen, Zhong-Hua
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|a Shabala, Sergey
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|a Venkataraman, Gayatri
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 73(2022), 3 vom: 27. Jan., Seite 998-1015
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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|g volume:73
|g year:2022
|g number:3
|g day:27
|g month:01
|g pages:998-1015
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|u http://dx.doi.org/10.1093/jxb/erab440
|3 Volltext
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