Jiao, Y., Lee, Y. K., Gladman, N., Chopra, R., Christensen, S. A., Regulski, M., Burow, G., Hayes, C., Burke, J., Ware, D., Xin, Z. (February 2018) MSD1 regulates pedicellate spikelet fertility in sorghum through the jasmonic acid pathway. Nat Commun, 9 (1). p. 822. ISSN 2041-1723
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Abstract
Grain number per panicle (GNP) is a major determinant of grain yield in cereals. However, the mechanisms that regulate GNP remain unclear. To address this issue, we isolate a series of sorghum [Sorghum bicolor (L.) Moench] multiseeded (msd) mutants that can double GNP by increasing panicle size and altering floral development so that all spikelets are fertile and set grain. Through bulk segregant analysis by next-generation sequencing, we identify MSD1 as a TCP (Teosinte branched/Cycloidea/PCF) transcription factor. Whole-genome expression profiling reveals that jasmonic acid (JA) biosynthetic enzymes are transiently activated in pedicellate spikelets. Young msd1 panicles have 50% less JA than wild-type (WT) panicles, and application of exogenous JA can rescue the msd1 phenotype. Our results reveal a new mechanism for increasing GNP, with the potential to boost grain yield, and provide insight into the regulation of plant inflorescence architecture and development.
Item Type: | Paper |
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Subjects: | Investigative techniques and equipment > assays > next generation sequencing organism description > plant |
CSHL Authors: | |
Communities: | CSHL labs > Ware lab |
Depositing User: | Matt Covey |
Date: | 26 February 2018 |
Date Deposited: | 07 Mar 2018 13:34 |
Last Modified: | 10 Sep 2019 16:18 |
PMCID: | PMC5826930 |
Related URLs: | |
URI: | https://repository.cshl.edu/id/eprint/36206 |
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