Transcriptomics

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Rice expression atlas (3): Early embryogenesis


ABSTRACT: Gene expression throughout the reproductive process in rice (Oryza sativa) beginning with primordia development through pollination/fertilization to zygote formation was analyzed. We analyzed 25 stages/organs of rice reproductive development including early microsporogenesis stages with 57,381 probe sets, and identified around 26,000 expressed probe sets in each stage. Fine dissection of 25 reproductive stages/organs combined with detailed microarray profiling revealed dramatic, coordinated and finely tuned changes in gene expression. Decrease of expressed genes in the pollen maturation process was observed in a similar way with Arabidopsis and maize. An almost equal number of ab initio predicted genes and cloned genes appeared or disappeared coordinated with developmental stage progression. A large number of organ-/stage-specific genes were identified; notably 2,593 probe sets for developing anther, including 932 probe sets corresponding to ab initio predicted genes. Analysis of cell cycle-related genes revealed that several CDKs, cyclins and components of SCF E3 ubiquitin ligase complexes were expressed specifically in reproductive organs. Cell wall biosynthesis or degradation protein genes and transcription factor genes expressed specifically in reproductive stages were also newly identified. Rice genes homologous to reproduction-related genes in other plants showed expression profiles both consistent and inconsistent with their predicted functions. The rice reproductive expression atlas is likely to be the deepest and most comprehensive dataset available, indispensable for unraveling functions of many specific genes in plant reproductive processes that have not yet been thoroughly analyzed. Keywords: developmental stage comparison, tissue comparison, time course 0-4 DAP embryosacs were collected, and dissected into bottom 1/4 part (contains embryo) and remaining top 3/4 part (mainly endosperm). Two or three biological replicates for each tissue-stage were analyzed with Affymetrix Rice Genome Array, and total number of samples in this series is 27. Unpollinated embryo and ovary samples were references in this series.

ORGANISM(S): Oryza sativa  

SUBMITTER: Takahiko Kubo   Takako Mochizuki  Nori Kurata  Nobuhiro Tsutsumi  Mitsuru Niihama  Shinichiro Yamaki  Kentaro Yano  Youko Horiuchi  Masahiro Fujita  Yoko Mizuta  Hirotaka Kato  Yayoi Ueda  Katsutoshi Tsuda  Shunsuke Kikuchi 

PROVIDER: E-GEOD-14299 | ArrayExpress | 2010-11-11

SECONDARY ACCESSION(S): GSE14299PRJNA114549

REPOSITORIES: GEO, ArrayExpress

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Gene expression throughout the reproductive process in rice (Oryza sativa) beginning with primordia development through pollination/fertilization to zygote formation was analyzed. We analyzed 25 stages/organs of rice reproductive development including early microsporogenesis stages with 57,381 probe sets, and identified around 26,000 expressed probe sets in each stage. Fine dissection of 25 reproductive stages/organs combined with detailed microarray profiling revealed dramatic, coordinated and  ...[more]

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