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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/err280
|2 doi
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|a pubmed24n0707.xml
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|a (NLM)21984648
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Ma, Liya
|e verfasserin
|4 aut
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|a NADPH oxidase AtrbohD and AtrbohF function in ROS-dependent regulation of Na⁺/K⁺homeostasis in Arabidopsis under salt stress
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|c 2012
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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 19.04.2012
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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 Maintaining cellular Na(+)/K(+) homeostasis is pivotal for plant survival in saline environments. However, knowledge about the molecular regulatory mechanisms of Na(+)/K(+) homeostasis in plants under salt stress is largely lacking. In this report, the Arabidopsis double mutants atrbohD1/F1 and atrbohD2/F2, in which the AtrbohD and AtrbohF genes are disrupted and generation of reactive oxygen species (ROS) is pronouncedly inhibited, were found to be much more sensitive to NaCl treatments than wild-type (WT) and the single null mutant atrbohD1 and atrbohF1 plants. Furthermore, the two double mutant seedlings had significantly higher Na(+) contents, lower K(+) contents, and resultant greater Na(+)/K(+) ratios than the WT, atrbohD1, and atrbohF1 under salt stress. Exogenous H(2)O(2) can partially reverse the increased effects of NaCl on Na(+)/K(+) ratios in the double mutant plants. Pre-treatments with diphenylene iodonium chloride, a widely used inhibitor of NADPH oxidase, clearly enhanced the Na(+)/K(+) ratios in WT seedlings under salt stress. Moreover, NaCl-inhibited inward K(+) currents were arrested, and NaCl-promoted increases in cytosolic Ca(2+) and plasma membrane Ca(2+) influx currents were markedly attenuated in atrbohD1/F1 plants. No significant differences in the sensitivity to osmotic or oxidative stress among the WT, atrbohD1, atrbohF1, atrbohD1/F1, and atrbohD2/F2 were observed. Taken together, these results strongly suggest that ROS produced by both AtrbohD and AtrbohF function as signal molecules to regulate Na(+)/K(+) homeostasis, thus improving the salt tolerance of Arabidopsis
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a DNA Primers
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|a Reactive Oxygen Species
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|a Salts
|2 NLM
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|a Sodium
|2 NLM
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|a 9NEZ333N27
|2 NLM
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|a NADPH Oxidases
|2 NLM
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|a EC 1.6.3.-
|2 NLM
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|a Potassium
|2 NLM
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|a RWP5GA015D
|2 NLM
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|a Zhang, Huan
|e verfasserin
|4 aut
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|a Sun, Lirong
|e verfasserin
|4 aut
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|a Jiao, Yiheng
|e verfasserin
|4 aut
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|a Zhang, Guozeng
|e verfasserin
|4 aut
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|a Miao, Chen
|e verfasserin
|4 aut
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|a Hao, Fushun
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 63(2012), 1 vom: 08. Jan., Seite 305-17
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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|g volume:63
|g year:2012
|g number:1
|g day:08
|g month:01
|g pages:305-17
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|u http://dx.doi.org/10.1093/jxb/err280
|3 Volltext
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