NDLI: Barren inflorescence1 Functions in Organogenesis During Vegetative and Inflorescence Development in Maize

Content Provider	PubMed Central
Author	Solmaz, Barazesh Paula, Mcsteen
Abstract	Maize (Zea mays) has a highly branched inflorescence due to the production of different types of axillary meristems. Characterization of the barren inflorescence class of mutants has led to the discovery of genes required for axillary meristem initiation in the inflorescence. Previous studies showed that barren inflorescence2 (bif2) encodes a serine/threonine protein kinase that regulates auxin transport, and barren stalk1 (ba1) encodes a basic helix-loop-helix transcription factor that acts downstream of auxin transport. Here, we characterize Barren inflorescence1 (Bif1), a classical semidominant mutation of maize. Developmental, histological, and genetic analyses show that Bif1 mutants are defective in the initiation of all axillary meristems in the inflorescence. Real time RT–PCR experiments show that both bif2 and ba1 are expressed at lower levels in Bif1 mutants. Double-mutant analyses demonstrate that Bif1 exhibits an epistatic interaction with ba1 and a synergistic interaction with bif2. The dramatic phenotypic enhancement observed in Bif1; bif2 double mutants implies that bif1 plays an overlapping role with bif2 in the initiation of lateral organs during vegetative development. The phenotypic resemblance of Bif1 to bif2 mutants and the reduction of auxin transport in Bif1 mutants suggest that bif1 functions as a regulator of auxin transport in maize.
Related Links	http://dx.doi.org/10.1534/genetics.107.084079
Ending Page	401
Page Count	13
Starting Page	389
File Format	PDF
ISSN	00166731
Journal	Genetics
Issue Number	1
Volume Number	179
Language	English
Publisher	Genetics Society of America
Publisher Date	2008-05-01
Access Restriction	Open
Rights Holder	Genetics Society of America
Subject Keyword	Genetics Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Genetics

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