Qin, H and et al, . (2011) Regulated expression of an isopentenyltransferase gene (IPT) in peanut significantly improves drought tolerance and increases yield under field conditions. Plant and Cell Physiology Advance Access. pp. 1-34.
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Abstract
Isopentenyltransferase (IPT) is a critical enzyme in the cytokinin biosynthetic pathway. The expression of IPT under the control of a maturation- and stress-induced promoter was shown to delay stress-induced plant senescence that resulted in an enhanced drought tolerance in both monocot and dicot plants. This report extends the earlier findings in tobacco and rice to peanut (Arachis hypogaea L.), an important oil crop and protein source. Regulated expression of IPT in peanut significantly improved drought tolerance in both laboratory and field conditions. Transgenic peanut plants maintained higher photosynthetic rates, higher stomatal conductance, and higher transpiration than wild-type control plants under reduced irrigation conditions. More importantly, transgenic peanut plants produced significantly higher yields than wild-type control plants in the field, indicating a great potential for the development of crops with improved performance and yield in water limited areas of the world.
| Item Type: | Article |
|---|---|
| Additional Information: | This research was supported by grants from Texas Peanut Producers Board, National Peanut Producers Board, and Texas Department of Agriculture. We thank Guoxin Shen, Xunlu Zhu, Neelam Mishra, Rongbin Hu, Jian Chen, Yinfeng Zhu, Gang Pan, Saranya Ganapathy, and Jaswanth Kanumuri for harvesting peanut seeds in the field or shelling the peanut pods. Hua Qin thanks the China Scholarship Council for a one-year fellowship to Texas Tech University. |
| Author Affiliation: | College of Life Sciences, Sichuan University, Chengdu, Sichuan Province, China |
| Subjects: | Agricultural Engineering |
| Divisions: | Groundnut |
| Depositing User: | Mr. SanatKumar Behera |
| Date Deposited: | 20 Feb 2012 13:59 |
| Last Modified: | 20 Feb 2012 13:59 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/3062 |
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