A newly characterized poplar gene expressed primarily in roots influences the plant’s root development and drought resistance.
This discovery will facilitate the development of bioenergy poplar trees with enhanced drought resistance, a key trait for the sustainable growth of bioenergy feedstocks on marginal lands.
Developing crops with improved drought resistance and water use efficiency is important for sustainable agriculture. These traits are particularly critical for plants to be grown as dedicated biomass feedstocks on marginal lands with little or no inputs such as irrigation. Since water is taken up by the roots, root architecture is directly related to the plant’s ability to tolerate drought conditions, and researchers have found several genomic regions (quantitative trait loci, or QTL) for root traits associated with drought resistance. However, the multigenic nature of many of these traits make using these QTL in a breeding program difficult, and few specific genes have been identified. Recently, scientists at Michigan Technological University and Oak Ridge National Laboratory used a powerful forward genetics approach known as activation tagging in the bioenergy crop poplar to identify a specific transcription factor gene (PtabZIP1-like), predominately expressed in poplar roots, that moderates the development of lateral roots and drought resistance through multiple metabolic pathways. The discovery of this gene provides a path to further knowledge of the functional mechanism of drought resistance, which could, in turn, offer potential new approaches to breeding more sustainable bioenergy feedstocks.
Contacts (BER PM)
Biological Systems Science Division
Office of Biological and Environmental Research
Office of Science
U.S. Department of Energy
Michigan Technological University, Houghton MI
This work was supported by the U.S. Department of Energy (DOE), Office of Science, Office of Biological and Environmental Research, Genomic Science program, Plant Feedstock Genomics (DE-SC0008462); and U.S. Department of Agriculture (USDA), National Institute of Food Agriculture, Institute of Bioenergy, Climate and Environment (grant number 2009-65504-05767). This work was also sponsored in part by DOE’s Genomic Science program (Science Focus Area ‘Plant-Microbe Interfaces’ at Oak Ridge National Laboratory) under contract DE-AC05-00OR22725 and USDA National Institute of Food Agriculture (MICW-2011-04378).
Dash, M., Y. S. Yordanov, T. Georgieva, T. J. Tschaplinski, E. Yordanova, and V. Busov. 2017. “Poplar PtabZIP1-Like Enhances Lateral Root Formation and Biomass Growth Under Drought Stress,” The Plant Journal 89(4), 692-705. DOI: 10.1111/tpj.134. (Reference link)
SC-23.2 Biological Systems Science Division, BER
BER supports basic research and scientific user facilities to advance DOE missions in energy and environment. More about BER
May 10, 2019
Quantifying Decision Uncertainty in Water Management via a Coupled Agent-Based Model
Considering risk perception can improve the representation of human decision-making processes in age [more...]
May 09, 2019
Projecting Global Urban Area Growth Through 2100 Based on Historical Time Series Data and Future Scenarios
Study provides country-specific urban area growth models and the first dataset on country-level urba [more...]
May 05, 2019
Calibrating Building Energy Demand Models to Refine Long-Term Energy Planning
A new, flexible calibration approach improved model accuracy in capturing year-to-year changes in bu [more...]
May 03, 2019
Calibration and Uncertainty Analysis of Demeter for Better Downscaling of Global Land Use and Land Cover Projections
Researchers improved the Demeter model’s performance by calibrating key parameters and establi [more...]
Apr 22, 2019
Representation of U.S. Warm Temperature Extremes in Global Climate Model Ensembles
Representation of warm temperature events varies considerably among global climate models, which has [more...]
List all highlights (possible long download time)