Over-Expression of HDA710 Delays Leaf Senescence in Rice (Oryza sativa L.)

Frontiers in Bioengineering and Biotechnology
Nannan ZhaoZhen Su

Abstract

Histone deacetylases (HDACs) influence chromatin state and gene expression. Eighteen HDAC genes with important biological functions have been identified in rice. In this study, we surveyed the gene presence frequency of all 18 rice HDAC genes in 3,010 rice accessions. HDA710/OsHDAC2 showed insertion/deletion (InDel) polymorphisms in almost 98.8% japonica accessions but only 1% indica accessions. InDel polymorphism association analysis showed that accessions with partial deletions in HDA710 tended to display early leaf senescence. Further transgenic results confirmed that HDA710 delayed leaf senescence in rice. The over-expression of HDA710 delayed leaf senescence, and the knock-down of HDA710 accelerated leaf senescence. Transcriptome analysis showed that photosynthesis and chlorophyll biosynthesis related genes were up-regulated in HDA710 over-expression lines, while some programmed cell death and disease resistance related genes were down-regulated. Co-expression network analysis with gene expression view revealed that HDA710 was co-expressed with multiple genes, particularly OsGSTU12, which was significantly up-regulated in 35S::HDA710-sense lines. InDels in the promoter region of OsGSTU12 and in the gene region of HDA710 oc...Continue Reading

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Methods Mentioned

BETA
acetylation
transgenic
RNA-Seq
reverse-transcription PCR

Software Mentioned

GSEA
PlantGSEA
agriGO
Tophat
SEACOMPARE
agriGO webserver
Cufflinks
Rice Pan - genome Browser ( RPAN )
Cytoscape

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