Plant and Cell Physiology Advance Access originally published online on September 6, 2008
Plant and Cell Physiology 2008 49(10):1417-1428; doi:10.1093/pcp/pcn128
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Special Issue - Regular Paper |
Various Spatiotemporal Expression Profiles of Anther-Expressed Genes in Rice
1Bioscience and Biotechnology Center, Nagoya University, Furocho, Chikusa, Nagoya, 464-8601 Japan
2Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577 Japan
3Division of Natural Science, Osaka Kyoiku University, Kashiwara, 582-8582 Japan
4Faculty of Agriculture, Meiji University, Kawasaki, 214-8571 Japan
5Department of Chemistry, Graduate School of Science, Osaka University, Osaka, 560-0043 Japan
6Plant Genetics Laboratory, National Institute of Genetics, Mishima, 411-8540 Japan
7The 21st Century Center of Excellence Program, Iwate University, Morioka, 020-8550 Japan
8Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657 Japan
9Division of Genome and Biodiversity Research, National Institute of Agrobiological Sciences, Tsukuba, 305-8602 Japan
10Faculty of Science, Tohoku University, Sendai, 980-8587 Japan
*Corresponding authors: Masao Watanabe, E-mail, nabe{at}ige.tohoku.ac.jp; Fax, +81-22-217-5683; Makoto Matsuoka, E-mail, makoto{at}nuagr1.agr.nagoya-u.ac.jp; Fax, +81-52-789-5226
| Abstract |
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The male gametophyte and tapetum play different roles during anther development although they are differentiated from the same cell lineage, the L2 layer. Until now, it has not been possible to delineate their transcriptomes due to technical difficulties in separating the two cell types. In the present study, we characterized the separated transcriptomes of the rice microspore/pollen and tapetum using laser microdissection (LM)-mediated microarray. Spatiotemporal expression patterns of 28,141 anther-expressed genes were classified into 20 clusters, which contained 3,468 (12.3%) anther-enriched genes. In some clusters, synchronous gene expression in the microspore and tapetum at the same developmental stage was observed as a novel characteristic of the anther transcriptome. Noteworthy expression patterns are discussed in connection with gene ontology (GO) categories and gene annotations, which are related to important biological events in anther development, such as pollen maturation, pollen germination, pollen tube elongation and pollen wall formation.
Keywords: Anther - Gene ontology - Laser microdissection - Microarray - Oryza sativa L - Synchronous gene expression
Abbreviations: BC, bicellular; GO, gene ontology; LM, laser microdissection; MEI, meiosis; miRNA, microRNA; TC, tricellular; TET, tetrad; UN, uninuclear; VSN, variance stabilization normalization
11These authors contributed equally to this work.
(Received July 20, 2008; Accepted August 30, 2008)
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