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MSD1 regulates pedicellate spikelet fertility in sorghum through the jasmonic acid pathway
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MSD1 regulates pedicellate spikelet fertility in sorghum through the jasmonic acid pathway
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Journal Article
MSD1 regulates pedicellate spikelet fertility in sorghum through the jasmonic acid pathway
2018
Overview
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.
Inflorescence architecture affects crop grain yield. Here, the authors deploy whole-genome sequencing-based bulk segregant analysis to identify the causal gene of a sorghum
multi-seeded
(
msd
) mutant and suggest MSD1 regulating the fertility of the pedicellate spikelets through jasmonic acid pathway.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 45/91
/ Cereals
/ Cyclopentanes - pharmacology
/ Gene Expression Regulation, Plant
/ Genomes
/ Grain
/ High-Throughput Nucleotide Sequencing
/ Humanities and Social Sciences
/ Inflorescence - drug effects
/ Inflorescence - growth & development
/ Molecular Sequence Annotation
/ Plant Growth Regulators - genetics
/ Plant Growth Regulators - metabolism
/ Plant Growth Regulators - pharmacology
/ Science
/ Seeds - growth & development
/ Sorghum
/ Sorghum - growth & development
