Abstract
Key message
PeTIP4;1–1, an aquaporin gene involved in bamboo shoot growth, is regulated by abiotic stresses. Overexpression of PeTIP4;1–1 confers drought and salinity tolerance in transgenic Arabidopsis.
Abstract
Aquaporins play a central role in numerous physiological processes throughout plant growth and development. PeTIP4;1–1, an aquaporin gene isolated from moso bamboo (Phyllostachys edulis), comprises an open reading frame (ORF) of 756 bp encoding a peptide of 251 amino acids. The genomic sequence corresponding to the ORF of PeTIP4;1–1 was 1777 bp and contained three exons separated by two introns. PeTIP4;1–1 was constitutively expressed at the highest level in culms, and the expression level was elevated with increasing height of the bamboo shoot. PeTIP4;1–1 was significantly up-regulated in response to drought and salinity stresses in bamboo roots and leaves. To investigate the role of PeTIP4;1–1 in response to drought and salinity stresses, transgenic Arabidopsis plants overexpressing PeTIP4;1–1 under the control of CaMV 35S promoter were generated and subjected to morphological and physiological assays. Compared with Col-0, the transgenic plants showed enhanced tolerance to drought and salinity stresses and produced longer taproots, which had more green leaves, higher F v/F m and NPQ values, higher activities of SOD, POD and CAT, lower MDA concentration and higher water content. Transcript levels of three stress-related genes (AtP5CS, AtNHX1 and AtLEA) were enhanced. These results indicated that PeTIP4;1–1 might play an important function in response to drought and salinity stresses, and is a candidate gene for breeding of stress tolerance in other crops through genetic engineering.
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Abbreviations
- AQPs:
-
Aquaporins
- AOD:
-
Average optical density
- CAT:
-
Catalase
- F v/F m :
-
Maximum quantum yield in photosystem II
- LEA:
-
Late embryogenesis abundant
- MDA:
-
Malondialdehyde
- MS:
-
Murashige and Skoog
- NHX:
-
Na+/H+ antiporter
- NPQ:
-
Non-photochemical quenching
- NSCs:
-
Non-structural carbohydrates
- ORF:
-
Open reading frame
- P5CS:
-
Δ1-Pyrroline-5-carboxylate synthetase
- POD:
-
Peroxidase
- qRT-PCR:
-
Quantitative real-time polymerase chain reaction
- ROS:
-
Reactive oxygen species
- RT-PCR:
-
Reverse transcription PCR
- SOD:
-
Superoxide dismutase
- TIP:
-
Tonoplast intrinsic protein
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Acknowledgements
This work received financial support from the Special Fund for Forest Scientific Research in the Public Welfare from State Forestry Administration of China (No. 201504106) and the Sub-Project of National Science and Technology Support Plan of the Twelfth Five-Year in China (No. 2015BAD04B01).
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Communicated by Baochun Li.
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Sun, H., Li, L., Lou, Y. et al. The bamboo aquaporin gene PeTIP4;1–1 confers drought and salinity tolerance in transgenic Arabidopsis . Plant Cell Rep 36, 597–609 (2017). https://doi.org/10.1007/s00299-017-2106-3
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DOI: https://doi.org/10.1007/s00299-017-2106-3