Targeted misexpression of <i>AGAMOUS</i> in whorl 2 of <i>Arabidopsis</i> flowers
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<jats:p>In <jats:italic>Arabidopsis,</jats:italic> transcripts of the floral organ identity genes <jats:italic>APETALA3, APETALA1, AGAMOUS</jats:italic>, and <jats:italic>PISTILLATA</jats:italic> are expressed only in a subset of the floral organs. To test and extend present models for establishment of floral organ identity, we constructed a transgenic line that expresses the <jats:italic>AGAMOUS</jats:italic> gene under the control of the <jats:italic>APETALA3</jats:italic> promoter (pAP3::AG). In wild‐type flowers, <jats:italic>AGAMOUS</jats:italic> is expressed in the third and fourth floral whorls, whereas <jats:italic>APETALA3</jats:italic> is expressed at high levels in whorls two and three. Under the control of the <jats:italic>APETALA3</jats:italic> promoter, <jats:italic>AGAMOUS</jats:italic> is misexpressed in the second whorl of the flower. The organs in the second whorl of pAP3::AG flowers either fail to develop or develop as stamens. When pAP3::AG is crossed to the homeotic mutants <jats:italic>apetala1, apetala3, pistillata, agamous</jats:italic> and <jats:italic>superman</jats:italic>, novel floral phenotypes result. In pAP3::AG <jats:italic>agamous</jats:italic>‐3 mutants, the flowers are indeterminate and consist of a repetition of sepals and stamens, rather than sepals and petals, as is observed in <jats:italic>agamous</jats:italic> single mutants; the indeterminacy demonstrates that <jats:italic>AG</jats:italic> is required in the fourth whorl to make the flower determinate.</jats:p>
収録刊行物
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- The Plant Journal
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The Plant Journal 11 (4), 825-839, 1997-04
Wiley
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詳細情報 詳細情報について
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- CRID
- 1363388844421387136
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- NII論文ID
- 30014607928
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- NII書誌ID
- AA10846815
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- ISSN
- 1365313X
- 09607412
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