MSD1 regulates pedicellate spikelet fertility in sorghum through the jasmonic acid pathway

Nature Communications
Yinping JiaoZhanguo Xin

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.

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Citations

Sep 28, 2018·The Plant Journal : for Cell and Molecular Biology·Richard E BoylesStephen Kresovich
Oct 31, 2019·International Journal of Molecular Sciences·Lavanya DampanaboinaZhanguo Xin
Sep 12, 2019·The New Phytologist·Shun Sakuma, Thorsten Schnurbusch
Oct 11, 2019·International Journal of Molecular Sciences·Nicholas GladmanZhanguo Xin
Jul 8, 2020·Genome Biology·Rajiv K ParvathaneniAndrea L Eveland
Nov 3, 2020·AoB Plants·Sintayehu D DabaMohsen Mohammadi
Dec 5, 2018·Trends in Genetics : TIG·Zhaobin DongGeorge Chuck
Mar 4, 2021·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Huaiqing HaoHai-Chun Jing
Apr 9, 2021·The Plant Cell·Taylor AuBuchon-ElderElizabeth A Kellogg
May 2, 2021·Scientific Reports·Hideki TakanashiNobuhiro Tsutsumi
Jul 17, 2021·Molecular Plant·Leina ZhouZhongwei Lin
Sep 20, 2021·The Plant Journal : for Cell and Molecular Biology·Lichun CaoZheng Yuan
Nov 6, 2021·Planta·Zhanguo XinGeoffrey Morris

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Datasets Mentioned

BETA
SRP127741

Methods Mentioned

BETA
scanning electron microscopy
PCR
RNA-seq
genotyping
in vitro transcription

Software Mentioned

Cuffdiff
Ensembl Variant Effect Predictor
R
STAR
Samtools
Bcftools
Bowtie2
agriGO
DNAman
Cufflinks

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