PMID:2535466

Citation	Bowman, JL, Smyth, DR and Meyerowitz, EM (1989) Genes directing flower development in Arabidopsis. Plant Cell 1:37-52
Abstract	We describe the effects of four recessive homeotic mutations that specifically disrupt the development of flowers in Arabidopsis thaliana. Each of the recessive mutations affects the outcome of organ development, but not the location of organ primordia. Homeotic transformations observed are as follows. In agamous-1, stamens to petals; in apetala2-1, sepals to leaves and petals to staminoid petals; in apetala3-1, petals to sepals and stamens to carpels; in pistillata-1, petals to sepals. In addition, two of these mutations (ap2-1 and pi-1) result in loss of organs, and ag-1 causes the cells that would ordinarily form the gynoecium to differentiate as a flower. Two of the mutations are temperature-sensitive. Temperature shift experiments indicate that the wild-type AP2 gene product acts at the time of primordium initiation; the AP3 product is active later. It seems that the wild-type alleles of these four genes allow cells to determine their place in the developing flower and thus to differentiate appropriately. We propose that these genes may be involved in setting up or responding to concentric, overlapping fields within the flower primordium.
Links	PubMed PMC159735 Online version:10.1105/tpc.1.1.37
Keywords	Alleles; Genes, Recessive; Microscopy, Electron, Scanning; Mutation; Phenotype; Plant Development; Plants/genetics; Plants/ultrastructure
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Annotations

Gene product	Qualifier	GO Term	Evidence Code	with/from	Aspect	Extension	Notes	Status
ARATH:Q9SX14		GO:0048438: floral whorl development	ECO:0000315:		P		Fig 1B, Figure 2B shows the SEM micrograph of four stages of flower development, with a nested flower (sepals and petals replacing stamens and carpels). Table 1 summarizes their findings, with the third and fourth whorl of mutant flowers differing from wild-type.	complete CACAO 8201
ARATH:Q9SX14	involved_in	GO:0048438: floral whorl development	ECO:0000315: mutant phenotype evidence used in manual assertion		P		Seeded From UniProt	complete
ARATH:AP2		GO:0010093: specification of floral organ identity	ECO:0000315:		P		Figure 2C shows the SEM micrograph of four stages of flower development, with sepals replaced by leaves. Table 1 summarizes the findings, with the first and second whorl of mutant flowers differing from wild-type, varying depending on temperature.	complete CACAO 8214
ARATH:AP2	involved_in	GO:0010093: specification of floral organ identity	ECO:0000315: mutant phenotype evidence used in manual assertion		P		Seeded From UniProt	complete
ARATH:AP3		GO:0010093: specification of floral organ identity	ECO:0000315:		P		Figure 2D shows the SEM micrograph of four stages of flower development, with sepals developing in place of petals. Table 1 summarizes the findings, with the second and third whorl of mutant flowers differing from wild-type, varying depending on temperature. The higher the temperature, the more altered the organs.	complete CACAO 8217
ARATH:AP3	involved_in	GO:0010093: specification of floral organ identity	ECO:0000315: mutant phenotype evidence used in manual assertion		P		Seeded From UniProt	complete
ARATH:PIST		GO:0010093: specification of floral organ identity	ECO:0000315:		P		Figure 2E shows the SEM micrograph of four stages of flower development, with no third whorl. Table 1 summarizes their findings, with the second, third, and fourth whorl of mutant flowers differing from wild-type.	complete CACAO 8222
ARATH:PIST	involved_in	GO:0010093: specification of floral organ identity	ECO:0000315: mutant phenotype evidence used in manual assertion		P		Seeded From UniProt	complete

References

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