Gene expression profiling in rice young panicle and vegetative organs and identification of panicle-specific genes through known gene functions |
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Authors: | Jiabin Tang Hong’ai Xia Dayong Li Mengliang Cao Yong Tao Wei Tong Xiuqing Zhang Songnian Hu Jian Wang Jun Yu Huanming Yang Lihuang Zhu |
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Institution: | (1) Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China;(2) Beijing Genomics Institute, Chinese Academy of Sciences, Beijing, 101300, China;(3) National Hybrid Rice R & D Center, Changsha, 410125, China |
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Abstract: | In rice, at the stage from pistil and stamen primordia formation to microsporocyte meiosis, the young panicle organs (YPO)
make a great contribution to grain productivity. This period corresponds to the onset of meiosis and marks the transition
from vegetative to reproductive stages. By comparing gene expression profiling of YPO with that of rice aerial vegetative
organs (AVO), it is possible to gain further molecular insight into this period that is developmentally and functionally important.
In this report, a total of 92,582 high-quality ESTs from 5′-end sequencing, including 44,247 from YPO and 48,335 from AVO,
were obtained and classified. There were 12,884 (29.12%) ESTs from YPO and 16,304 (33.73%) ESTs from AVO matched to known
genes, which generated 1,667 and 2,172 known genes, respectively, after integration of these ESTs. From the functions of known
homologous genes, we identified some tissue- and developmental-stage-specified genes in YPO. The expression of these genes
clearly reflected the unique functional characteristics of YPO. Furthermore, we estimated that there are about 10,000 mRNAs
specifically expressed in rice YPO.
Jiabin Tang and Hong’ai Xia contributed equally to this work |
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Keywords: | Gene expression profiling Young panicle organs Vegetative organs Rice |
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