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The primary root of sorghum bicolor (L. Moench) as a model system to study brassinosteroid signaling in crops

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Abstract

Roots anchor plants to the soil and are essential for a successful plant growth and adaptation to the environment. Research on the primary root in the plant model system Arabidopsis thaliana has yielded important advances in the molecular and cellular understanding of root growth and development. Several studies have uncovered how the hormones brassinosteroids (BRs) control cell cycle and differentiation programs through different cell-specific signaling pathways that are key for root growth and development. Currently, an important challenge resides in the translation of the current knowledge on Arabidopsis roots into agronomically valuable species to improve the agricultural production and to meet the food security goals of the millennium. In this chapter, we characterize the primary root apex of the cereal Sorghum bicolor (L. Moench) (sorghum), analyze the physiological response of sorghum roots to BRs, and examine the phylogeny of the BRASSINOSTEROID INSENSITIVE1-like receptor family in Arabidopsis and its orthologous genes in sorghum. Overall, we support the use of sorghum as a suitable crop model species for the study of BR signaling in root growth and development. The methods presented enable any laboratory worldwide to use sorghum primary roots as a favorite organ for the study of growth and development in crops.

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Blasco-Escámez, D., Lozano-Elena, F., Fàbregas, N., & Caño-Delgado, A. I. (2017). The primary root of sorghum bicolor (L. Moench) as a model system to study brassinosteroid signaling in crops. In Methods in Molecular Biology (Vol. 1564, pp. 181–192). Humana Press Inc. https://doi.org/10.1007/978-1-4939-6813-8_15

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