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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Pereira, Andy Greco, Raffaella Marsch-martinez, Nayelli Nataraja, Karaba N. Dixit, Shital Aharoni, Asaph Udayakumar, Makarla Karaba, Aarati Trijatmiko, Kurniawan R. Krishnan, Arjun |
| Description | Author Affiliation: Karaba A ( Plant Research International, Wageningen University and Research Centre, P.O. Box 16, 6700AA Wageningen, The Netherlands.); |
| Abstract | Freshwater is a limited and dwindling global resource; therefore, efficient water use is required for food crops that have high water demands, such as rice, or for the production of sustainable energy biomass. We show here that expression of the Arabidopsis HARDY (HRD) gene in rice improves water use efficiency, the ratio of biomass produced to the water used, by enhancing photosynthetic assimilation and reducing transpiration. These drought-tolerant, low-water-consuming rice plants exhibit increased shoot biomass under well irrigated conditions and an adaptive increase in root biomass under drought stress. The HRD gene, an AP2/ERF-like transcription factor, identified by a gain-of-function Arabidopsis mutant hrd-D having roots with enhanced strength, branching, and cortical cells, exhibits drought resistance and salt tolerance, accompanied by an enhancement in the expression of abiotic stress associated genes. HRD overexpression in Arabidopsis produces thicker leaves with more chloroplast-bearing mesophyll cells, and in rice, there is an increase in leaf biomass and bundle sheath cells that probably contributes to the enhanced photosynthesis assimilation and efficiency. The results exemplify application of a gene identified from the model plant Arabidopsis for the improvement of water use efficiency coincident with drought resistance in the crop plant rice. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 39 |
| Volume Number | 104 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2007-09-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Arabidopsis Proteins Chemistry Arabidopsis Genetics Metabolism Gene Expression Regulation, Plant Transcription Factor AP-2 Physiology Chloroplasts Disasters Mutation Oryza Sativa Phenotype Photosynthesis Plant Physiological Phenomena Plant Roots Plant Transpiration Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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