Dosage differences in 12-OXOPHYTODIENOATE REDUCTASE genes modulate wheat root growth

Gilad Gabay, Hanchao Wang, Junli Zhang, Jorge I. Moriconi, German F. Burguener, Leonardo D. Gualano, Tyson Howell, Adam Lukaszewski, Brian Staskawicz, Myeong-Je Cho, Jaclyn Tanaka, Tzion Fahima, Haiyan Ke, Katayoon Dehesh, Guo-Liang Zhang, Jin-Ying Gou, Mats Hamberg, Guillermo E. Santa-María () and Jorge Dubcovsky ()
Additional contact information
Gilad Gabay: University of California
Hanchao Wang: University of California
Junli Zhang: University of California
Jorge I. Moriconi: Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
German F. Burguener: University of California
Leonardo D. Gualano: Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
Tyson Howell: University of California
Adam Lukaszewski: University of California
Brian Staskawicz: University of California
Myeong-Je Cho: University of California
Jaclyn Tanaka: University of California
Tzion Fahima: University of Haifa
Haiyan Ke: University of California
Katayoon Dehesh: University of California
Guo-Liang Zhang: Fudan University
Jin-Ying Gou: Fudan University
Mats Hamberg: Karolinska Institutet
Guillermo E. Santa-María: Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
Jorge Dubcovsky: University of California

Nature Communications, 2023, vol. 14, issue 1, 1-15

Abstract: Abstract Wheat, an essential crop for global food security, is well adapted to a wide variety of soils. However, the gene networks shaping different root architectures remain poorly understood. We report here that dosage differences in a cluster of monocot-specific 12-OXOPHYTODIENOATE REDUCTASE genes from subfamily III (OPRIII) modulate key differences in wheat root architecture, which are associated with grain yield under water-limited conditions. Wheat plants with loss-of-function mutations in OPRIII show longer seminal roots, whereas increased OPRIII dosage or transgenic over-expression result in reduced seminal root growth, precocious development of lateral roots and increased jasmonic acid (JA and JA-Ile). Pharmacological inhibition of JA-biosynthesis abolishes root length differences, consistent with a JA-mediated mechanism. Transcriptome analyses of transgenic and wild-type lines show significant enriched JA-biosynthetic and reactive oxygen species (ROS) pathways, which parallel changes in ROS distribution. OPRIII genes provide a useful entry point to engineer root architecture in wheat and other cereals.

Date: 2023
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DOI: 10.1038/s41467-023-36248-y

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