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Article

OsARF11 Promotes Growth, Meristem, Seed, and Vein Formation during Rice Plant Development

1
Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
2
Plant Cell and Developmental Biology, King Abdullah University of Science and Technology, Ibn Al Haytham Bldg.2, Thuwal 23955-6900, Saudi Arabia
*
Author to whom correspondence should be addressed.
Academic Editor: Stephan Pollmann
Int. J. Mol. Sci. 2021, 22(8), 4089; https://doi.org/10.3390/ijms22084089
Received: 9 March 2021 / Revised: 6 April 2021 / Accepted: 13 April 2021 / Published: 15 April 2021
The plant hormone auxin acts as a mediator providing positional instructions in a range of developmental processes. Studies in Arabidopsis thaliana L. show that auxin acts in large part via activation of Auxin Response Factors (ARFs) that in turn regulate the expression of downstream genes. The rice (Oryza sativa L.) gene OsARF11 is of interest because of its expression in developing rice organs and its high sequence similarity with MONOPTEROS/ARF5, a gene with prominent roles in A. thaliana development. We have assessed the phenotype of homozygous insertion mutants in the OsARF11 gene and found that in relation to wildtype, osarf11 seedlings produced fewer and shorter roots as well as shorter and less wide leaves. Leaves developed fewer veins and larger areoles. Mature osarf11 plants had a reduced root system, fewer branches per panicle, fewer grains per panicle and fewer filled seeds. Mutants had a reduced sensitivity to auxin-mediated callus formation and inhibition of root elongation, and phenylboronic acid (PBA)-mediated inhibition of vein formation. Taken together, our results implicate OsARF11 in auxin-mediated growth of multiple organs and leaf veins. OsARF11 also appears to play a central role in the formation of lateral root, panicle branch, and grain meristems. View Full-Text
Keywords: auxin response factor; auxin signaling; auxin perception; meristem; vein patterning; leaf expansion; root elongation; seed development; rice fecundity auxin response factor; auxin signaling; auxin perception; meristem; vein patterning; leaf expansion; root elongation; seed development; rice fecundity
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MDPI and ACS Style

Sims, K.; Abedi-Samakush, F.; Szulc, N.; Macias Honti, M.G.; Mattsson, J. OsARF11 Promotes Growth, Meristem, Seed, and Vein Formation during Rice Plant Development. Int. J. Mol. Sci. 2021, 22, 4089. https://doi.org/10.3390/ijms22084089

AMA Style

Sims K, Abedi-Samakush F, Szulc N, Macias Honti MG, Mattsson J. OsARF11 Promotes Growth, Meristem, Seed, and Vein Formation during Rice Plant Development. International Journal of Molecular Sciences. 2021; 22(8):4089. https://doi.org/10.3390/ijms22084089

Chicago/Turabian Style

Sims, Katherine, Fatemeh Abedi-Samakush, Nicole Szulc, Monika G. Macias Honti, and Jim Mattsson. 2021. "OsARF11 Promotes Growth, Meristem, Seed, and Vein Formation during Rice Plant Development" International Journal of Molecular Sciences 22, no. 8: 4089. https://doi.org/10.3390/ijms22084089

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