标题：AGLF provides C-function in floral organ identity through transcriptional regulation of AGAMOUS in Medicago truncatula
作者：Zhao, Yang; Liu, Rong; Xu, Yiteng; Wang, Minmin; Zhang, Jing; Bai, Mingyi; Han, Chao; Xiang, Fengning; Wang, Zeng-Yu; Mysore, Kirank 更多 作者机构：[Zhao, Yang; Liu, Rong; Xu, Yiteng; Wang, Minmin; Zhang, Jing; Bai, Mingyi; Han, Chao; Xiang, Fengning; Zhou, Chuanen] Shandong Univ, Sch Life Sci, Ke 更多
通讯作者地址：[Zhou, CE]Shandong Univ, Sch Life Sci, Key Lab Plant Dev & Environm Adaptat Biol, Minist Educ, Qingdao 266237, Peoples R China.
来源：PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
关键词：flower development; ABC model; AGAMOUS; Medicago truncatula
摘要：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.