期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 116, 期 11, 页码 5176-5181出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1820468116
关键词
flower development; ABC model; AGAMOUS; Medicago truncatula
资金
- Ministry of Science and Technology of China [2015CB943500]
- National Natural Science Foundation of China [31671507, 31371235, 31400262]
- National Natural Science Foundation of Shandong Province [ZR2014CQ022, ZR2018ZC0334]
- 1000-Talents Plan from China for young researchers
- Shandong University of China [11200087963004]
- National Science Foundation [DBI 0703285, IOS-1127155]
Floral development is one of the model systems for investigating the mechanisms underlying organogenesis in plants. Floral organ identity is controlled by the well-known ABC model, which has been generalized to many flowering plants. Here, we report a previously uncharacterized MYB-like gene, AGAMOUS-LIKE FLOWER (AGLF), involved in flower development in the model legume Medicago truncatula. Loss-of-function of AGLF results in flowers with stamens and carpel transformed into extra whorls of petals and sepals. Compared with the loss-of-function mutant of the class C gene AGAMOUS (MtAG) in M. truncatula, the defects in floral organ identity are similar between aglf and mtag, but the floral indeterminacy is enhanced in the aglf mutant. Knockout of AGLF in the mutants of the class A gene MtAP1 or the class B gene MtPI leads to an addition of a loss-of-C-function phenotype, reflecting a conventional relationship of AGLF with the canonical A and B genes. Furthermore, we demonstrate that AGLF activates MtAG in transcriptional levels in control of floral organ identity. These data shed light on the conserved and diverged molecular mechanisms that control flower development and morphology among plant species.
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