NDLI: elongated mesocotyl1, a Phytochrome-Deficient Mutant of Maize1

Content Provider	PubMed Central
Author	Sawers, Ruairidh J. H. Linley, Philip J. Farmer, Phyllis R. Hanley, Nicole P. Costich, Denise E. Terry, Matthew J. Brutnell, Thomas P.
Copyright Year	2002
Abstract	To begin the functional dissection of light signal transduction pathways of maize (Zea mays), we have identified and characterized the light-sensing mutant elm1 (elongated mesocotyl1). Seedlings homozygous for elm1 are pale green, show pronounced elongation of the mesocotyl, and fail to de-etiolate under red or far-red light. Etiolated elm1 mutants contain no spectrally active phytochrome and do not deplete levels of phytochrome A after red-light treatment. High-performance liquid chromatography analyses show that elm1 mutants are unable to convert biliverdin IXα to 3Z-phytochromobilin, preventing synthesis of the phytochrome chromophore. Despite the impairment of the phytochrome photoreceptors, elm1 mutants can be grown to maturity in the field. Mature plants retain aspects of the seedling phenotype and flower earlier than wild-type plants under long days. Thus, the elm1 mutant of maize provides the first direct evidence for phytochrome-mediated modulation of flowering time in this agronomically important species.
Related Links	http://dx.doi.org/10.1104/pp.006411
Ending Page	163
Page Count	9
Starting Page	155
File Format	PDF
ISSN	00320889
e-ISSN	15322548
Journal	Plant Physiology
Issue Number	1
Volume Number	130
Language	English
Publisher	American Society of Plant Physiologists
Publisher Date	2002-09-01
Access Restriction	Open
Rights Holder	American Society of Plant Physiologists
Subject Keyword	Plant Science Genetics Physiology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Genetics Physiology Plant Science

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