UNIFOLIATA regulates leaf and flower morphogenesis in pea

Julie Hofer, Lynda Turner, Roger Hellens, Mike Ambrose, Peter Matthews, Anthony Michael, Noel Ellis

Research output: Contribution to journalArticle

290 Citations (Scopus)

Abstract

Background: The vegetative phenotype of the pea mutant unifoliata (uni) is a simplification of the wild-type compound leaf to a single leaflet. Mutant uni plants are also self-sterile and the flowers resemble known floral meristem and organ identity mutants. In Antirrhinum and Arabidopsis, mutations in the floral meristem identity gene FLORICAULA/LEAFY (FLO/LFY) affect flower development alone, whereas the tobacco FLO/LFY homologue, NFL, is expressed in vegetative tissues, suggesting that NFL specifies determinacy in the progenitor cells for both flowers and leaves. In this paper, we characterised the pea homologue of FLO/LFY. Results: The pea cDNA homologue of FLO/LFY, PEAFLO, mapped to the uni locus in recombinant-inbred mapping populations and markers based on PEAFLO cosegregated with uni in segregating sibling populations. The characterisation of two spontaneous uni mutant alleles, one containing a deletion and the other a point mutation in the PEAFLO coding sequences, predicted that PEAFLO corresponds to UNI and that the mutant vegetative phenotype was conferred by the defective PEAFLO gene. Conclusions: The uni mutant demonstrates that there are shared regulatory processes in the morphogenesis of leaves and flowers and that floral meristem identity genes have an extended role in plant development. Pleiotropic regulatory genes such as UNI support the hypothesis that leaves and flowers derive from a common ancestral sporophyll-like structure. The regulation of indeterminacy during leaf and flower morphogenesis by UNI may reflect a primitive function for the gene in the pre-angiosperm era.

Original languageEnglish (US)
Pages (from-to)581-587
Number of pages7
JournalCurrent Biology
Volume7
Issue number8
StatePublished - Aug 1 1997

Fingerprint

Peas
Morphogenesis
morphogenesis
peas
Genes
flowers
mutants
Meristem
meristems
leaves
genes
Antirrhinum
Genetic Pleiotropy
Tobacco
Phenotype
phenotype
Angiosperms
Plant Development
point mutation
Regulator Genes

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

Cite this

Hofer, J., Turner, L., Hellens, R., Ambrose, M., Matthews, P., Michael, A., & Ellis, N. (1997). UNIFOLIATA regulates leaf and flower morphogenesis in pea. Current Biology, 7(8), 581-587.

UNIFOLIATA regulates leaf and flower morphogenesis in pea. / Hofer, Julie; Turner, Lynda; Hellens, Roger; Ambrose, Mike; Matthews, Peter; Michael, Anthony; Ellis, Noel.

In: Current Biology, Vol. 7, No. 8, 01.08.1997, p. 581-587.

Research output: Contribution to journalArticle

Hofer, J, Turner, L, Hellens, R, Ambrose, M, Matthews, P, Michael, A & Ellis, N 1997, 'UNIFOLIATA regulates leaf and flower morphogenesis in pea', Current Biology, vol. 7, no. 8, pp. 581-587.
Hofer J, Turner L, Hellens R, Ambrose M, Matthews P, Michael A et al. UNIFOLIATA regulates leaf and flower morphogenesis in pea. Current Biology. 1997 Aug 1;7(8):581-587.
Hofer, Julie ; Turner, Lynda ; Hellens, Roger ; Ambrose, Mike ; Matthews, Peter ; Michael, Anthony ; Ellis, Noel. / UNIFOLIATA regulates leaf and flower morphogenesis in pea. In: Current Biology. 1997 ; Vol. 7, No. 8. pp. 581-587.
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