AtDsPTP1 acts as a negative regulator in osmotic stress signalling during Arabidopsis seed germination and seedling establishment

© The Author 2014. Published by Oxford University Press on behalf of the Society for Experimental Biology.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 66(2015), 5 vom: 01. März, Seite 1339-53
1. Verfasser: Liu, Rui (VerfasserIn)
Weitere Verfasser: Liu, Yinggao, Ye, Nenghui, Zhu, Guohui, Chen, Moxian, Jia, Liguo, Xia, Yiji, Shi, Lu, Jia, Wensuo, Zhang, Jianhua
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Abscisic acid (ABA) Arabidopsis dual-specificity protein phosphatase osmotic stress root elongation seed germination. Arabidopsis Proteins Sodium Chloride mehr... 451W47IQ8X DsPTP1 protein, Arabidopsis EC 3.1.3.48 Dual-Specificity Phosphatases
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520 |a Dual-specificity protein phosphatases (DsPTPs) target both tyrosine and serine/threonine residues and play roles in plant growth and development. We have characterized an Arabidopsis mutant, dsptp1, which shows a higher seed germination rate and better root elongation under osmotic stress than the wild type. By contrast, its overexpression line, DsPTP1-OE, shows inhibited seed germination and root elongation; and its complemented line, DsPTP1-Com, resembles the wild type and rescues DsPTP1-OE under osmotic stress. Expression of AtDsPTP1 is enhanced by osmotic stress in seed coats, bases of rosette leaves, and roots. Compared with the wild type, the dsptp1 mutant shows increased proline accumulation, reduced malondialdehyde (MDA) content and ion leakage, and enhanced antioxidant enzyme activity in response to osmotic stress. AtDsPTP1 regulates the transcript levels of various dehydration-responsive genes under osmotic stress. Abscisic acid (ABA) accumulation in dsptp1 under osmotic stress is reduced with reduced expression of the ABA-biosynthesis gene NCED3 and increased expression of the ABA-catabolism gene CYP707A4. AtDsPTP1 also regulates the expression of key components in the ABA-signalling pathway. In conclusion, AtDsPTP1 regulates ABA accumulation, and acts as a negative regulator in osmotic stress signalling during Arabidospsis seed germination and seedling establishment 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Abscisic acid (ABA) 
650 4 |a Arabidopsis 
650 4 |a dual-specificity protein phosphatase 
650 4 |a osmotic stress 
650 4 |a root elongation 
650 4 |a seed germination. 
650 7 |a Arabidopsis Proteins  |2 NLM 
650 7 |a Sodium Chloride  |2 NLM 
650 7 |a 451W47IQ8X  |2 NLM 
650 7 |a DsPTP1 protein, Arabidopsis  |2 NLM 
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650 7 |a Dual-Specificity Phosphatases  |2 NLM 
650 7 |a EC 3.1.3.48  |2 NLM 
700 1 |a Liu, Yinggao  |e verfasserin  |4 aut 
700 1 |a Ye, Nenghui  |e verfasserin  |4 aut 
700 1 |a Zhu, Guohui  |e verfasserin  |4 aut 
700 1 |a Chen, Moxian  |e verfasserin  |4 aut 
700 1 |a Jia, Liguo  |e verfasserin  |4 aut 
700 1 |a Xia, Yiji  |e verfasserin  |4 aut 
700 1 |a Shi, Lu  |e verfasserin  |4 aut 
700 1 |a Jia, Wensuo  |e verfasserin  |4 aut 
700 1 |a Zhang, Jianhua  |e verfasserin  |4 aut 
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773 1 8 |g volume:66  |g year:2015  |g number:5  |g day:01  |g month:03  |g pages:1339-53 
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