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Type: Journal article
Title: The AGL6-like gene OsMADS6 regulates floral organ and meristem identities in rice
Author: Li, H.
Liang, W.
Jia, R.
Yin, C.
Zong, J.
Kong, H.
Zhang, D.
Citation: Cell Research, 2010; 20(3):299-313
Publisher: Nature Publishing Group
Issue Date: 2010
ISSN: 1001-0602
Statement of
Haifeng Li, Wanqi Liang, Ruidong Jia, Changsong Yin, Jie Zong, Hongzhi Kong, and Dabing Zhang
Abstract: Although AGAMOUS-LIKE6 (AGL6) MADS-box genes are ancient with wide distributions in gymnosperms and angiosperms, their functions remain poorly understood. Here, we show the biological role of the AGL6-like gene, OsMADS6, in specifying floral organ and meristem identities in rice (Oryza sativa L.). OsMADS6 was strongly expressed in the floral meristem at early stages. Subsequently, OsMADS6 transcripts were mainly detectable in paleas, lodicules, carpels and the integument of ovule, as well as in the receptacle. Compared to wild type plants, osmads6 mutants displayed altered palea identity, extra glume-like or mosaic organs, abnormal carpel development and loss of floral meristem determinacy. Strikingly, mutation of a SEPALLATA (SEP)-like gene, OsMADS1 (LHS1), enhanced the defect of osmads6 flowers, and no inner floral organs or glume-like structures were observed in whorls 2 and 3 of osmads1-z osmads6-1 flowers. Furthermore, the osmads1-z osmads6-1 double mutants developed severely indeterminate floral meristems. Our finding, therefore, suggests that the ancient OsMADS6 gene is able to specify “floral state” by determining floral organ and meristem identities in monocot crop rice together with OsMADS1.
Keywords: Flowers
MADS Domain Proteins
Plant Proteins
Amino Acid Sequence
Base Sequence
Genes, Plant
Molecular Sequence Data
Rights: ©2010 IBCB, SIBS, CAS
DOI: 10.1038/cr.2009.143
Appears in Collections:Agriculture, Food and Wine publications
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