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Type: Journal article
Title: Regulatory network and genetic interactions established by OsMADS34 in rice inflorescence and spikelet morphogenesis
Author: Meng, Q.
Li, X.
Zhu, W.
Yang, L.
Liang, W.
Dreni, L.
Zhang, D.
Citation: Journal of Integrative Plant Biology, 2017; 59(9):693-707
Publisher: Wiley
Issue Date: 2017
ISSN: 1672-9072
Statement of
Qingcai Meng, Xiaofeng Li, Wanwan Zhu, Li Yang, Wanqi Liang, Ludovico Dreni and Dabing Zhang
Abstract: Grasses display highly diversified inflorescence architectures that differ in the arrangement of spikelets and flowers and determine cereal yields. However, the molecular basis underlying grass inflorescence morphogenesis remains largely unknown. Here we investigate the role of a functionally diversified SEPALLATA MADS-box transcription factor, OsMADS34, in regulating rice (Oryza sativa L.) inflorescence and spikelet development. Microarray analysis showed that, at the very early stages of inflorescence formation, dysfunction of OsMADS34 caused altered expression of 379 genes that are associated with protein modification and degradation, transcriptional regulation, signaling and metabolism activity. Genetic analysis revealed that OsMADS34 controls different aspects of inflorescence structure, branching and meristem activity synergistically with LAX PANICLE1 (LAX1) and FLORAL ORGAN NUMBER4 (FON4), as evidenced by the enhanced phenotypes of osmads34 lax1 and osmads34 fon4 compared with the single mutants. Additionally, double mutant between osmads34 and the sterile lemma defective mutant elongated empty glume (ele) displayed an enhanced phenotype, that is, longer and wider sterile lemmas that were converted into lemma/palea-like organs, suggesting that ELE and OsMADS34 synergistically control the sterile lemma development. OsMADS34 may act together with OsMADS15 in controlling sterile lemma development. Collectively, these findings provide insights into the regulatory function of OsMADS34 in rice inflorescence and spikelet development.
Keywords: Flowering Tops
MADS Domain Proteins
Plant Proteins
Gene Expression
Gene Regulatory Networks
Description: Online on Aug. 26, 2017
Rights: © 2017 Institute of Botany, Chinese Academy of Sciences
DOI: 10.1111/jipb.12594
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Appears in Collections:Agriculture, Food and Wine publications
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