Interaction between the ABRUPTUS/PINOID and APETALA1 genes regulating the inflorescence development in Arabidopsis thaliana

• Published in: Russian journal of genetics Vol. 46; no. 3; pp. 331 - 339
• Main Authors: Kavai-ool, U. N, Karpenko, O. Yu, Ezhova, T. A
• Format: Journal Article
• Language: English
• Published: Dordrecht Dordrecht : SP MAIK Nauka/Interperiodica 01.03.2010; SP MAIK Nauka/Interperiodica
• Subjects: Animal Genetics and Genomics; Arabidopsis thaliana; Biomedical and Life Sciences; Biomedicine; Cauliflower mosaic virus; Human Genetics; Microbial Genetics and Genomics; Plant Genetics; Wild Type Plant; Floral Organ; Double Mutant; Floral Meristem Identity; Inflorescence Stem
• ISSN: 1022-7954; 1608-3369
• DOI: 10.1134/S1022795410030105

Plant morphology was analyzed in the abr and ap1-1 single mutants, the abr ap1-1 double mutant, and abr mutant plants with extopic expression of the AP1 gene under the control of the 35S RNA constitutive promoter of the cauliflower mosaic virus (abr 35S::AP1). The level of AP1 gene expression was examined in wild-type plants and the abr mutant. The ABR gene was found to interact with the AP1 via dominant epistasis when determining the time of a transition to the reproductive developmental stage and the floral meristem identity. The abr mutant displayed a higher level of AP1 transcription and extended regions of its transcription in leaves and internal whorls of the flowers. Based on these findings, the ABR gene was assumed to play an indirect role in restricting the level and spatial range of AP1 transcription. A complementary interaction of the dominant alleles was observed during floral development, implicating both of the genes in the process.