Regulation of Root Angle and Gravitropism

Toal, Ted W.; Ron, Mily; Gibson, Donald; Kajala, Kaisa; Splitt, Bessie; Johnson, Logan S.; Miller, Nathan D.; Slovak, Radka; Gaudinier, Allison; Patel, Rohan; de Lucas, Miguel; Provart, Nicholas J.; Spalding, Edgar P.; Busch, Wolfgang; Kliebenstein, Daniel J.; Brady, Siobhan M.

Abstract

Regulation of plant root angle is critical for obtaining nutrients and water and is an important trait for plant breeding. A plant's final, long-term root angle is the net result of a complex series of decisions made by a root tip in response to changes in nutrient availability, impediments, the gravity vector and other stimuli. When a root tip is displaced from the gravity vector, the short-term process of gravitropism results in rapid reorientation of the root toward the vertical. Here, we explore both short- and long-term regulation of root growth angle, using natural variation in tomato to identify shared and separate genetic features of the two responses. Mapping of expression quantitative trait loci mapping and leveraging natural variation between and within species including Arabidopsis suggest a role for PURPLE ACID PHOSPHATASE 27 and CELL DIVISION CYCLE 73 in determining root angle.

Citation

Toal, T. W., Ron, M., Gibson, D., Kajala, K., Splitt, B., Johnson, L. S., Miller, N. D., Slovak, R., Gaudinier, A., Patel, R., de Lucas, M., Provart, N. J., Spalding, E. P., Busch, W., Kliebenstein, D. J., & Brady, S. M. (2018). Regulation of Root Angle and Gravitropism. G3: Genes | Genomes | Genetics, 8(12), 3841–3855. https://doi.org/10.1534/g3.118.200540

• Journal Article Type: Article
• Acceptance Date: Oct 2, 2018
• Online Publication Date: Oct 15, 2018
• Publication Date: Dec 1, 2018
• Deposit Date: Oct 17, 2018
• Journal: G3: Genes | Genomes | Genetics
• Electronic ISSN: 2160-1836
• Publisher: Genetics Society of America
• Peer Reviewed: Peer Reviewed
• Volume: 8
• Issue: 12
• Pages: 3841–3855
• DOI: https://doi.org/10.1534/g3.118.200540
• Public URL: https://durham-repository.worktribe.com/output/1316306
• Related Public URLs: http://www.g3journal.org/content/ggg/early/2018/10/15/g3.118.200540.full.pdf