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The pea photoperiod response gene STERILE NODES is an ortholog of LUX ARRHYTHMO1[W][OPEN]


Liew, LC and Hecht, V and Sussmilch, FC and Weller, JL, The pea photoperiod response gene STERILE NODES is an ortholog of LUX ARRHYTHMO1[W][OPEN], Plant Physiology, 165, (2) pp. 648-657. ISSN 0032-0889 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 American Society of Plant Biologists

DOI: doi:10.1104/pp.114.237008


The STERILE NODES (SN) locus in pea (Pisum sativum) was one of the first photoperiod response genes to be described and provided early evidence for the genetic control of long-distance signaling in flowering-time regulation. Lines homozygous for recessive sn mutations are early flowering and photoperiod insensitive, with an increased ability to promote flowering across a graft union in short-day conditions. Here, we show that SN controls developmental regulation of genes in the FT family and rhythmic regulation of genes related to circadian clock function. Using a positional and functional candidate approach, we identify SN as the pea ortholog of LUX ARRHYTHMO, a GARP transcription factor from Arabidopsis (Arabidopsis thaliana) with an important role in circadian clock function. In addition to induced mutants, sequence analysis demonstrates the presence of at least three other independent, naturally occurring loss-of-function mutations among known sn cultivars. Examination of genetic and regulatory interactions between SN and two other circadian clock genes, HIGH RESPONSE TO PHOTOPERIOD (HR) and DIE NEUTRALIS (DNE), suggests a complex relationship in which HR regulates expression of SN and the role of DNE and HR in control of flowering is dependent on SN. These results extend previous work to show that pea orthologs of all three Arabidopsis evening complex genes regulate clock function and photoperiod-responsive flowering and suggest that the function of these genes may be widely conserved.

Item Details

Item Type:Refereed Article
Keywords:flowering, photoperiod, circadian clock, legume
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Environmentally sustainable plant production
Objective Field:Environmentally sustainable plant production not elsewhere classified
UTAS Author:Liew, LC (Miss Lim Chee Liew)
UTAS Author:Hecht, V (Dr Valerie Hecht)
UTAS Author:Sussmilch, FC (Dr Frances Sussmilch)
UTAS Author:Weller, JL (Associate Professor Jim Weller)
ID Code:97191
Year Published:2014
Web of Science® Times Cited:27
Deposited By:Plant Science
Deposited On:2014-12-05
Last Modified:2017-11-02

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