Plant and Cell Physiology Advance Access originally published online on August 28, 2008
Plant and Cell Physiology 2008 49(10):1407-1416; doi:10.1093/pcp/pcn124
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Special Issue - Regular Paper |
Separated Transcriptomes of Male Gametophyte and Tapetum in Rice: Validity of a Laser Microdissection (LM) Microarray
1Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577 Japan
2Division of Natural Science, Osaka Kyoiku University, Kashiwara, 582-8582 Japan
3Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, 113-8657 Japan
4Laboratory of Biotechnology, National Institute of Crop Science, Tsukuba, 305-8518 Japan
5Faculty of Agriculture, Meiji University, Kawasaki, 214-8571 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
8Faculty of Science, Tohoku University, Sendai, 980-8578 Japan
*Corresponding author: E-mail, nabe{at}ige.tohoku.ac.jp; Fax, +81-22-217-5683.
| Abstract |
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In flowering plants, the male gametophyte, the pollen, develops in the anther. Complex patterns of gene expression in both the gametophytic and sporophytic tissues of the anther regulate this process. The gene expression profiles of the microspore/pollen and the sporophytic tapetum are of particular interest. In this study, a microarray technique combined with laser microdissection (44K LM-microarray) was developed and used to characterize separately the transcriptomes of the microspore/pollen and tapetum in rice. Expression profiles of 11 known tapetum specific-genes were consistent with previous reports. Based on their spatial and temporal expression patterns, 140 genes which had been previously defined as anther specific were further classified as male gametophyte specific (71 genes, 51%), tapetum-specific (seven genes, 5%) or expressed in both male gametophyte and tapetum (62 genes, 44%). These results indicate that the 44K LM-microarray is a reliable tool to analyze the gene expression profiles of two important cell types in the anther, the microspore/pollen and tapetum.
Keywords: Anther - Laser microdissection - Microarray - Oryza sativa - L. Microspore/pollen - Tapetum
Abbreviations: DIG, digoxigenin; GUS, β-glucuronidase; IR, infrared; LM, laser microdissection
9These authors contributed equally to this work
(Received July 20, 2008; Accepted August 15, 2008)
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