...Jennifer Pfluger; Patricia Zambryski Genetic and physiological analyses implicate auxin flux in patterning,initiation and growth of floral organs. Within the Arabidopsis flower, the ETTIN/ARF3 transcription factor responds to auxin to effect perianth organ number and reproductive organ...

... and AGAMOUS , although its expression is repressed in first whorl organs by the A function gene APETALA2 . Further, we have shown that disruptions to gynoecial pattern formation seen in ettin mutants can largely be attributed to ectopic SPATULA action. ETTIN’s role seems to be to negatively regulate SPATULA...

... by morphological and histological landmarks for regional boundaries, as well as tissue-specific reporter lines. NPA’s effects on gynoecium patterning mimic the phenotype of mutations in ETTIN , a member of the auxin response factor family of transcription factors. In addition, application of different...

...Allen Sessions; Jennifer L. Nemhauser; Andy McCall; Judith L. Roe; Ken A. Feldmann; Patricia C. Zambryski ABSTRACT ettin ( ett ) mutations have pleiotropic effects on Arabidopsis flower development, causing increases in perianth organ number, decreases in stamen number and anther formation...

... reporter gene are used to compare the wild-type pattern of gynoecium cell types and regions, with patterns formed in gynoecia of individuals homozygous for a series of allelic mutations at the ETTIN locus. ettin gynoecia show morphological and histological alterations that appear to result from the merging...