AINTEGUMENTA Promotes Petal Identity and Acts as a Negative Regulator of AGAMOUS | Zendy

Beth A. Krizek | Zendy; Valerie Prost | Zendy; Anthony Macías | Zendy

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AINTEGUMENTA Promotes Petal Identity and Acts as a Negative Regulator of AGAMOUS

Author(s) -

Beth A. Krizek,

Valerie Prost,

Anthony Macías

Publication year - 2000

Publication title -

the plant cell

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.324

H-Index - 341

eISSN - 1532-298X

pISSN - 1040-4651

DOI - 10.1105/tpc.12.8.1357

Subject(s) - agamous , petal , biology , gynoecium , whorl (mollusc) , psychological repression , arabidopsis , microbiology and biotechnology , mutant , regulator , botany , gene , genetics , gene expression , stamen , pollen , genus

The Arabidopsis AINTEGUMENTA (ANT) gene has been shown previously to be involved in ovule development and in the initiation and growth of floral organs. Here, we show that ANT acts in additional processes during flower development, including repression of AGAMOUS (AG) in second whorl cells, promotion of petal epidermal cell identity, and gynoecium development. Analyses of ap2-1 ant-6 double mutants reveal that ANT acts redundantly with AP2 to repress AG in second whorl cells. The abaxial surface of ant petals contains features such as stomata and elongated, interdigitated cells that are not present on wild-type petals. The loss of petal identity in these second whorl cells does not result from ectopic AG expression, suggesting that ANT acts in a pathway promoting petal cell identity that is independent of its role in repression of AG. These data suggest that ANT may function as a class A gene.

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