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Genes directing flower development in Arabidopsis

Bowman, John L. and Smyth, David R. and Meyerowitz, Elliot M. (1989) Genes directing flower development in Arabidopsis. Plant Cell, 1 (1). pp. 37-52. ISSN 1040-4651. PMCID PMC159735. doi:10.1105/tpc.1.1.37.

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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.

Item Type:Article
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Meyerowitz, Elliot M.0000-0003-4798-5153
Additional Information:© 1989 American Society of Plant Biologists. Received October 26, 1988. This work was supported by grant PCM-8703439 from the National Science Foundation (to E.M.M.). J.L.B. is supported by National Institutes of Health training grant 5T32-GM07616. D.R.S. thanks colleagues at Monash University for supporting his sabbatical leave at Caltech. We thank our laboratory colleagues for discussions and constructive criticism, and P. Koen of the Caltech Electron Microscope Facility for advice.
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NIH Predoctoral Fellowship5T32-GM07616
Issue or Number:1
PubMed Central ID:PMC159735
Record Number:CaltechAUTHORS:20161213-143840805
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Official Citation:Bowman JL, Smyth DR, Meyerowitz EM. Genes directing flower development in Arabidopsis. The Plant Cell. 1989;1(1):37-52. doi:10.1105/tpc.1.1.37.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72783
Deposited By: George Porter
Deposited On:14 Dec 2016 17:27
Last Modified:11 Nov 2021 05:06

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