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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1111/nph.12990
|2 doi
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|a pubmed24n0804.xml
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|a (DE-627)NLM241185610
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|a (NLM)25145265
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Han, Shuan
|e verfasserin
|4 aut
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|a MPK6 controls H2 O2-induced root elongation by mediating Ca2+ influx across the plasma membrane of root cells in Arabidopsis seedlings
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|c 2015
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 24.08.2015
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2014 The Authors. New Phytologist © 2014 New Phytologist Trust.
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|a Mitogen-activated protein kinases (MPKs) play critical roles in signalling and growth, and Ca(2+) and H2 O2 control plant growth processes associated with abscisic acid (ABA). However, it remains unclear how MPKs are involved in H2 O2 - and Ca(2+) -mediated root elongation. Root elongation in seedlings of the loss-of-function mutant Atmpk6 (Arabidopsis thaliana MPK6) was less sensitive to moderate H2 O2 or ABA than that in wild-type (WT) plants. The enhanced elongation was a result of root cell expansion. This effect disappeared when ABA-induced H2 O2 accumulation or the cytosolic Ca(2+) increase were defective. Molecular and biochemical evidence showed that increased expression of the cell wall peroxidase PRX34 in Atmpk6 root cells enhanced apoplastic H2 O2 generation; this promoted a cytosolic Ca(2+) increase and Ca(2+) influx across the plasma membrane. The plasma membrane damage caused by high levels of H2 O2 was ameliorated in a Ca(2+) -dependent manner. These results suggested that there was intensified PRX34-mediated H2 O2 generation in the apoplast and increased Ca(2+) flux into the cytosol of Atmpk6 root cells; that is, the spatial separation of apoplastic H2 O2 from cytosolic Ca(2+) in root cells prevented H2 O2 -induced inhibition of root elongation in Atmpk6 seedlings
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a AtMPK6
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|a abscisic acid (ABA)
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|a apoplastic H2O2 increase
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|a cell wall peroxidase34
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|a cytosolic Ca2+ rise
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|a plasma membrane Ca2+ channels
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|a root elongation
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|a Arabidopsis Proteins
|2 NLM
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|a Abscisic Acid
|2 NLM
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|a 72S9A8J5GW
|2 NLM
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|a Hydrogen Peroxide
|2 NLM
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|a BBX060AN9V
|2 NLM
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|a Peroxidases
|2 NLM
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|a EC 1.11.1.-
|2 NLM
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|a PRX34 protein, Arabidopsis
|2 NLM
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| 650 |
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|a EC 1.11.1.7
|2 NLM
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| 650 |
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|a MPK6 protein, Arabidopsis
|2 NLM
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| 650 |
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|a EC 2.7.11.24
|2 NLM
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| 650 |
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|a Mitogen-Activated Protein Kinases
|2 NLM
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| 650 |
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|a EC 2.7.11.24
|2 NLM
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| 650 |
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|a Calcium
|2 NLM
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| 650 |
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|a SY7Q814VUP
|2 NLM
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| 700 |
1 |
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|a Fang, Lin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ren, Xuejian
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Wenle
|e verfasserin
|4 aut
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| 700 |
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|a Jiang, Jing
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 205(2015), 2 vom: 22. Jan., Seite 695-706
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:205
|g year:2015
|g number:2
|g day:22
|g month:01
|g pages:695-706
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| 856 |
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|u http://dx.doi.org/10.1111/nph.12990
|3 Volltext
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|d 205
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|h 695-706
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