TY - JOUR
T1 - MSD1 regulates pedicellate spikelet fertility in sorghum through the jasmonic acid pathway
AU - Jiao, Yinping
AU - Lee, Young Koung
AU - Gladman, Nicholas
AU - Chopra, Ratan
AU - Christensen, Shawn A.
AU - Regulski, Michael
AU - Burow, Gloria
AU - Hayes, Chad
AU - Burke, John
AU - Ware, Doreen
AU - Xin, Zhanguo
N1 - Funding Information:
Y.J., R.C., G.B., J.B., C.H. and Z.X. acknowledge support from the United Sorghum Checkoff program. Z.X. was also partly supported by USDA ARS 3096-21000-019-00-D. Y.J., Y.K.L., N.G., M.R. and D.W. were partly supported by USDA ARS 8062-21000-041-00D; Y.K.L. acknowledges support from Brain Pool Program funded by the Ministry of Science and ICT through the National Research Foundation of Korea (2018H1D3A2002524); N.G. was supported by an ARS-funded postdoc fellowship.
Publisher Copyright:
© 2018 The Author(s).
PY - 2018/12/1
Y1 - 2018/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85042912174&partnerID=8YFLogxK
U2 - 10.1038/s41467-018-03238-4
DO - 10.1038/s41467-018-03238-4
M3 - Article
C2 - 29483511
AN - SCOPUS:85042912174
VL - 9
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 822
ER -