NDLI: An Arabidopsis thaliana (Ler) inbred line AFDL exhibiting abnormal flower development mainly caused by reduced AP1 expression

Content Provider	Springer Nature Link
Author	Qi, XiaoLi Jiang, Yao Tang, Fang Wang, MinJie Hu, JianJun Zhao, ShuTang Sha, Wei Lu, MengZhu
Copyright Year	2011
Abstract	The genetic network controlling flowering and flower development consists of a set of floral integrator genes that play a role in light sensing, hormone signaling and developmental pathways. These integrators activate the expression of meristem identity genes LEAFY (LFY) and APETALA1 (AP1) to initiate the flowering transition. However, how the expression of key genes, such as AP1, responds to diverse signals during flower development remains largely unknown. Here, we report that an Arabidopsis abnormal flower development inbred line (AFDL) exhibits a phenotype similar to the ap1 mutant, with delayed flowering time and a high frequency of transition of flower meristems into inflorescence meristems after flowering. The flower organs with an abnormal first whorl lack the second whorl and the increased number of inflorescences at the first- and second-whorl positions most closely resembled the phenotypes of ap1/cal double mutants. Interestingly, both normal and abnormal flowers coexisted in a single individual. Microarray and quantitative real-time PCR analysis revealed that the expression of AP1 was significantly reduced, while the expression of its interacting genes TERMINAL FLOWER 1 (TFL1), SHORT VEGETATIVE PHASE (SVP), AGAMOUS-like 24 (AGL24), SEPALLATA (SEP) and CAULIFLOWER (CAL) and upstream genes FLOWERING LOCUS C (FLC) and FLM were increased in AFDL, which could serve to explain its phenotype. The expression of genes responsive to different stimuli dramatically changed in AFDL relative to the wild type, as revealed by the differential display of transcripts, indicating that this expression variation is subject to a threshold, leading to an on/off expression pattern of the master regulatory gene (such as AP1) of flower development.
Starting Page	39
Ending Page	47
Page Count	9
File Format	PDF
ISSN	10016538
Journal	Chinese Science Bulletin
Volume Number	56
Issue Number	1
e-ISSN	18619541
Language	English
Publisher	SP Science China Press
Publisher Date	2010-12-28
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	Arabidopsis thaliana gene regulation flower development AP1 microarray RT-PCR Engineering Earth Sciences Chemistry/Food Science Physics Life Sciences Science
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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