Improving phosphorus use efficiency: a complex trait with emerging opportunities

Plant Journal - Tập 90 Số 5 - Trang 868-885 - 2017
Sigrid Heuer1, Roberto A. Gaxiola2, Rhiannon K. Schilling3, Luís Herrera‐Estrella4, Damar López‐Arredondo5, Matthias Wissuwa6, Emmanuel Delhaize7, Hatem Rouached8
1University of Adelaide / Australian Centre for Plant Functional Genomics (ACPFG) PMB 1 Glen Osmond 5064 Australia
2Arizona State University, Tempe, AZ USA
3University of Adelaide (Adelaide, South Australia, 5005 Australia - Australia)
4LANGEBIO Irapuato Mexico
5Stela Genomics Mexico Irapuato Mexico
6JIRCAS - Japan International Research Center for Agricultural Sciences (Japan)
7CSIRO Agriculture and Food, Canberra, Australia
8CNRS INRA Montpellier France

Tóm tắt

Summary

Phosphorus (P) is one of the essential nutrients for plants, and is indispensable for plant growth and development. P deficiency severely limits crop yield, and regular fertilizer applications are required to obtain high yields and to prevent soil degradation. To access P from the soil, plants have evolved high‐ and low‐affinity Pi transporters and the ability to induce root architectural changes to forage P. Also, adjustments of numerous cellular processes are triggered by the P starvation response, a tightly regulated process in plants. With the increasing demand for food as a result of a growing population, the demand for P fertilizer is steadily increasing. Given the high costs of fertilizers and in light of the fact that phosphate rock, the source of P fertilizer, is a finite natural resource, there is a need to enhance P fertilizer use efficiency in agricultural systems and to develop plants with enhanced Pi uptake and internal P‐use efficiency (PUE). In this review we will provide an overview of continuing relevant research and highlight different approaches towards developing crops with enhanced PUE. In this context, we will summarize our current understanding of root responses to low phosphorus conditions and will emphasize the importance of combining PUE with tolerance of other stresses, such as aluminum toxicity. Of the many genes associated with Pi deficiency, this review will focus on those that hold promise or are already at an advanced stage of testing (OsPSTOL1, AVP1, PHO1 and OsPHT1;6). Finally, an update is provided on the progress made exploring alternative technologies, such as phosphite fertilizer.

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Plant Journal

Tập 90 Số 5

868-885

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