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Title: The SPOROCYTELESS/NOZZLE gene is involved in controlling stamen identity in Arabidopsis
Authors: Liu, X.
Huang, J.
Parameswaran, S.
Ito, T. 
Seubert, B.
Auer, M.
Rymaszewski, A.
Jia, G.
Owen, H.A.
Zhao, D.
Issue Date: Nov-2009
Citation: Liu, X., Huang, J., Parameswaran, S., Ito, T., Seubert, B., Auer, M., Rymaszewski, A., Jia, G., Owen, H.A., Zhao, D. (2009-11). The SPOROCYTELESS/NOZZLE gene is involved in controlling stamen identity in Arabidopsis. Plant Physiology 151 (3) : 1401-1411. ScholarBank@NUS Repository.
Abstract: The stamen, which consists of an anther and a filament, is the male reproductive organ in a flower. The specification of stamen identity in Arabidopsis (Arabidopsis thaliana) is controlled by a combination of the B genes APETALA3 (AP3) and PISTILLATA, the C gene AGAMOUS (AG), and the E genes SEPALLATA1 (SEP1) to SEP4. The "floral organ-building" gene SPOROCYTELESS/NOZZLE (SPL/NZZ) plays a central role in regulating anther cell differentiation. However, much less is known about how "floral organ identity" and floral organ-building genes interact to control floral organ development. In this study, we report that ectopic expression of SPL/NZZ not only affects flower development in the wild-type background but also leads to the transformation of petal-like organs into stamen-like organs in flowers of ap2-1, a weak ap2 mutant allele. Moreover, our loss-of-function analysis indicates that the spl/nzz mutant enhances the phenotype of the ag weak allele ag-4. Furthermore, ectopic expression and overexpression of SPL/NZZ altered expression of AG, SEP3, and AP2 in rosette leaves and flowers, while ectopic expression of SPL/NZZ resulted in ectopic expression of AG and SEP3 in the outer whorls of flowers. Our results indicate that the SPL/NZZ gene is engaged in controlling stamen identity via interacting with genes required for stamen identity in Arabidopsis. © 2009 American Society of Plant Biologists.
Source Title: Plant Physiology
ISSN: 00320889
DOI: 10.1104/pp.109.145896
Appears in Collections:Staff Publications

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