Transcriptome profiling provides insights into molecular mechanism in Peanut semi-dwarf mutant

These results provide useful information for uncovering the molecular mechanism regulating peanut stem height

Fengdan Guo; Junjie Ma; Lei Hou; Suhua Shi; Jinbo Sun; Guanghui Li; Chuanzhi Zhao; Han Xia; Shuzhen Zhao; Xingjun Wang; Yanxiu Zhao

2020

Scholarcy highlights

  • Plant height, mainly decided by main stem height, is the major agronomic trait and closely correlated to crop yield
  • The difference might be due to changes in cell division and cell expansion during the stem growth process, which was supported by the identification of a number of cell wall biosynthesis and metabolism enzyme encoding genes as differentially expressed genes
  • These results suggested that the cell wall biosynthesis and extensibility were reduced in sdm2 stem, which might result in reduced cell division and cell expansion and further cause short internode and small number of stem nodes
  • Several GA biosynthetic genes showed irregular change trends and some seemed to promote the biosynthesis of GAs, while all Gibberellin-regulated proteins genes decreased in sdm2 stem which had the same expressional pattern with those of cell wall related genes
  • The transcriptome analysis of sdm2 identified a number of differentially expressed genes involved in hormone biosynthesis, signaling and cell wall synthetic and metabolic pathways
  • Genes in cell wall synthetic and metabolic pathway which related to cell elongation were generally down-regulated in sdm2 stem
  • These findings provide critical information for uncovering the molecular genetic control of peanut stem development

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