Abstract
Key message
An aquaporin protein AcPIP2 from Atriplex canescens was involved in plant growth rate, abiotic stress tolerance in Arabidopsis. Under limited water condition, AcPIP2 leaded to the sensitivity to drought stress.
Abstract
An aquaporin protein (AcPIP2) was obtained from the saltbush Atriplex canescens, which was in PIP2 subgroup belonging to the PIP subfamily, MIP superfamily. The subcellular localization of AcPIP2 showed the fusion protein AcPIP2-eGFP located at the plasma membrane in Nicotiana benthamiana. Overexpression of AcPIP2 in Arabidopsis fully proved that AcPIP2 was involved in plant growth rate, transpiration rate and abiotic stress tolerance (NaCl, drought and NaHCO3) in Arabidopsis, which is mostly in correspondence to gene expression pattern characterized by qRT-PCR performed in A. canescens. And under limited water condition, AcPIP2 overexpression leaded to the sensitivity to drought stress. In the view of the resistant effect in transgenic Arabidopsis overexpressing AcPIP2, the AcPIP2 may throw some light into understanding how the A. canescens plants cope with abiotic stress, and could be used in the genetic engineering to improve plant growth or selective tolerance to the abiotic stress.
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Abbreviations
- AQPs:
-
Proteins called aquaporins
- MIPs:
-
Major intrinsic proteins
- TIPs:
-
Tonoplast intrinsic proteins
- PIPs:
-
Plasma membrane intrinsic proteins
- NIPs:
-
Noduline 26-like intrinsic membrane proteins
- SIPs:
-
Small basic intrinsic proteins
- PCR:
-
Polymerase chain reaction
- eGFP:
-
Enhance green fluorescent protein
- cDNA:
-
Complementary DNA
- MS:
-
Murashige and Skoog
- Hyg:
-
Hygromycin
- OE:
-
Overexpresser
- WT:
-
Wild-type
- VC:
-
Vector
- EF1α:
-
Elongation factor 1-alpha
- FW:
-
Fresh weight
- DW:
-
Dry weight
- WC:
-
Water contents
- ROS:
-
Reactive oxygen species
- SOD:
-
Superoxide dismutase
- NBT:
-
Nitroblue tetrazolium
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Acknowledgments
This work was supported by grants of the 12th Five-Year Plan Project of Science and Technology Support, China (2012BAD19B04, 2014BAD14B02), and by the Research and Development of Industrial Technology Special at Jilin Provincial Development and Reform Commission (2013C001), and by the Ministry of Agriculture Key Project of GM Cultivation of New Varieties (2013ZX08004004), P. R. China, and by the Project 2014119 Supported by Graduate Innovation Fund of Jilin University.
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The authors declare that they have no conflict of interest.
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Communicated by H. Ebinuma.
J. Li and G. Yu contributed equally to this work.
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Li, J., Yu, G., Sun, X. et al. AcPIP2, a plasma membrane intrinsic protein from halophyte Atriplex canescens, enhances plant growth rate and abiotic stress tolerance when overexpressed in Arabidopsis thaliana . Plant Cell Rep 34, 1401–1415 (2015). https://doi.org/10.1007/s00299-015-1796-7
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DOI: https://doi.org/10.1007/s00299-015-1796-7