声明
ABSTRACT
摘要
TABLE OF CONTENTS
Chapter 1 Introduction
1.1 Endosperm development and imprinting
1.1.1 Endosperm development
1.1.2 Genomic imprinting and seed development
1.2 Epigenetic mechanisms of imprinting
1.2.1 DNA methylation
1.2.2 Histone Modification
1.3 Aims
Chapter 2 Materials and Methods
2.1 RNA and DNA isolation from rice endosperm
2.2 RT-PCR and sequencing
2.3 Bisulfite sequencing
2.4 5’RACE at Loc_Os11g36470 and Loc_os01g69110
2.5 Chromatin immunoprecipitation (ChIP) assay using antibody against H3K27me3
2.6 Germinating Nip seeds on 5-azacytidine and zebularine solutions
Chapter 3 Results
3.1 Maternal hypomethylation and H3K27me3 together with paternal allele methylation are associated with paternal expression of Os YUCCA11
3.2 Differential DNA methylation in the promoter region of maternal and paternal alleles of Loc_Os01g69110 results in alternative transcript initiation
3.3 DNA hypomethylation in the gene body of Os11g36470 contributes to production of shorter maternally biased transcripts in the endosperm
Chapter 4 Discussion
4.1 The conserved imprinted YUCCA genes in rice and Arabidopsis are regulated by similar mechanisms
4.2 Parent of origin specific activation of cryptic promoters requires DNA demethylation
REFERENCES
Supplementary Figures
Supplementary Tables
Publication
Acknowledgement