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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1111/j.1469-8137.2009.03177.x
|2 doi
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|a pubmed24n0649.xml
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|a eng
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|a Widodo, Basuki
|e verfasserin
|4 aut
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|a Response to zinc deficiency of two rice lines with contrasting tolerance is determined by root growth maintenance and organic acid exudation rates, and not by zinc-transporter activity
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 15.07.2010
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|a Date Revised 18.03.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a *Zinc (Zn)-deficient soils constrain rice (Oryza sativa) production and cause Zn malnutrition. The identification of Zn-deficiency-tolerant rice lines indicates that breeding might overcome these constraints. Here, we seek to identify processes underlying Zn-deficiency tolerance in rice at the physiological and transcriptional levels. *A Zn-deficiency-tolerant line RIL46 acquires Zn more efficiently and produces more biomass than its nontolerant maternal line (IR74) at low [Zn](ext) under field conditions. We tested if this was the result of increased expression of Zn(2+) transporters; increased root exudation of deoxymugineic acid (DMA) or low-molecular-weight organic acids (LMWOAs); and/or increased root production. Experiments were performed in field and controlled environment conditions. *There was little genotypic variation in transcript abundance of Zn-responsive root Zn(2+)-transporters between the RIL46 and IR74. However, root exudation of DMA and LMWOA was greater in RIL46, coinciding with increased root expression of putative ligand-efflux genes. Adventitious root production was maintained in RIL46 at low [Zn](ext), correlating with altered expression of root-specific auxin-responsive genes. *Zinc-deficiency tolerance in RIL46 is most likely the result of maintenance of root growth, increased efflux of Zn ligands, and increased uptake of Zn-ligand complexes at low [Zn](ext); these traits are potential breeding targets
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|a Journal Article
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|a Carboxylic Acids
|2 NLM
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|a Carrier Proteins
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|a Minerals
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|a Plant Proteins
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|a RNA, Messenger
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|a zinc-binding protein
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|a 2'-deoxymugineic acid
|2 NLM
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|a 74235-24-8
|2 NLM
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|a Zinc
|2 NLM
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|a J41CSQ7QDS
|2 NLM
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|a Broadley, Martin R
|e verfasserin
|4 aut
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|a Rose, Terry
|e verfasserin
|4 aut
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|a Frei, Michael
|e verfasserin
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|a Pariasca-Tanaka, Juan
|e verfasserin
|4 aut
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|a Yoshihashi, Tadashi
|e verfasserin
|4 aut
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|a Thomson, Michael
|e verfasserin
|4 aut
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|a Hammond, John P
|e verfasserin
|4 aut
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|a Aprile, Alessio
|e verfasserin
|4 aut
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|a Close, Timothy J
|e verfasserin
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|a Ismail, Abdelbagi M
|e verfasserin
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|a Wissuwa, Matthias
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 186(2010), 2 vom: 01. Apr., Seite 400-14
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
1 |
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|g volume:186
|g year:2010
|g number:2
|g day:01
|g month:04
|g pages:400-14
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|u http://dx.doi.org/10.1111/j.1469-8137.2009.03177.x
|3 Volltext
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