Abstract
The Arabidopsis gene AVP1 encodes an H+-pyrophosphatase that functions as a proton pump at the vacuolar membranes, generating a proton gradient across vacuolar membranes, which serves as the driving force for many secondary transporters on vacuolar membranes such as Na+/H+-antiporters. Overexpression of AVP1 could improve drought tolerance and salt tolerance in transgenic plants, suggesting a possible way in improving drought and salt tolerance in crops. The AVP1 was therefore introduced into peanut by Agrobacterium-mediated transformation. Analysis of AVP1-expressing peanut indicated that AVP1-overexpression in peanut could improve both drought and salt tolerance in greenhouse and growth chamber conditions, as AVP1-overexpressing peanuts produced more biomass and maintained higher photosynthetic rates under both drought and salt conditions. In the field, AVP1-overexpressing peanuts also outperformed wild-type plants by having higher photosynthetic rates and producing higher yields under low irrigation conditions.
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Abbreviations
- AVP1 :
-
Arabidopsis vacuolar pyrophosphatase 1
- IPT:
-
Isopentenyltransferase
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Acknowledgments
This research was supported by Grants from National Peanut Board and Texas Peanut Producers Board. Hua Qin thanks the China Scholarship Council for a 1-year fellowship to study abroad.
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Qin, H., Gu, Q., Kuppu, S. et al. Expression of the Arabidopsis vacuolar H+-pyrophosphatase gene AVP1 in peanut to improve drought and salt tolerance. Plant Biotechnol Rep 7, 345–355 (2013). https://doi.org/10.1007/s11816-012-0269-5
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DOI: https://doi.org/10.1007/s11816-012-0269-5