Two FD homologs from London plane (Platanus acerifolia) are associated with floral initiation and flower morphology

Cai, Fangfang; Shao, Changsheng; Zhang, Yanping; Shi, Gehui; Bao, Zhiru; Bao, Manzhu; Zhang, Jiaqi

doi:10.1016/j.plantsci.2021.110971

Cited by 7 publications

(2 citation statements)

References 42 publications

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“…In a landrace barley, AS of EARLY MATURITY8 ( EAM8 ) contributed to early flowering and short‐season adaptation (Xia et al, 2017). Recently, two closely related FD homologues, PaFDL1 and PaFDL2 , were both found to produce two transcripts via AS and were associated with floral initiation and flower morphology in Platanus acerifolia (Cai et al, 2021; Shao et al, 2022). In citrus, FCA and FLC from precocious trifoliate orange had several alternatively spliced transcripts and affected flowering time in transgenic Arabidopsis (Zhang et al, 2009; Ai et al, 2016; Ma et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

A bZIP transcription factor (CiFD) regulates drought‐ and low‐temperature‐induced flowering by alternative splicing in citrus

Zhang

et al. 2022

JIPB

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Drought and low temperature are two key environmental factors that induce adult citrus flowering. However, the underlying regulation mechanism is poorly understood. The bZIP transcription factor FD is a key component of the florigen activation complex (FAC) which is composed of FLOWERING LOCUS T (FT), FD, and 14-3-3 proteins. In this study, isolation and characterization of CiFD in citrus found that there was alternative splicing (AS) of CiFD, forming two different proteins (CiFDα and CiFDβ). Further investigation found that their expression patterns were similar in different tissues of citrus, but the subcellular localization and transcriptional activity were different. Overexpression of the CiFD DNA sequence (CiFD-DNA), CiFDα, or CiFDβ in tobacco and citrus showed early flowering, and CiFD-DNA transgenic plants were the earliest, followed by CiFDβ and CiFDα. Interestingly, CiFDα and CiFDβ were induced by low temperature and drought, respectively. Further analysis showed that CiFDα can form a FAC complex with CiFT, Ci14-3-3, and then bind to the citrus APETALA1 (CiAP1) promoter and promote its expression. However, CiFDβ can directly bind to the CiAP1 promoter independently of CiFT and Ci14-3-3. These results showed that CiFDβ can form a more direct and simplified pathway that is independent of the FAC complex to regulate drought-induced flowering through AS. In addition, a bHLH transcription factor (CibHLH96) binds to CiFD promoter and promotes the expression of CiFD under drought condition. Transgenic analysis found that CibHLH96 can promote flowering in transgenic tobacco. These results suggest that CiFD is involved in drought-and low-temperature-induced citrus flowering through different regulatory patterns.

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Section: Introductionmentioning

confidence: 99%

A bZIP transcription factor (CiFD) regulates drought‐ and low‐temperature‐induced flowering by alternative splicing in citrus

Zhang

et al. 2022

JIPB

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“…The PERIANTHIA gene encoding a bZIP transcription factor has been demonstrated to be involved in the evolution of flower pattern in the mustard family [ 46 ]. A recent report revealed that two bZIP genes, PaFDL1 and PaFDL2 , from Platanus acerifolia functioned as important regulators of flower initiation and morphology [ 47 ]. However, little is known about the roles of bZIP genes in controlling petal senescence.…”

Section: Discussionmentioning

confidence: 99%

A petunia transcription factor, PhOBF1, regulates flower senescence by modulating gibberellin biosynthesis

Xin

Yuan

et al. 2023

Horticulture Research

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Flower senescence is commonly enhanced by the endogenous hormone ethylene and suppressed by the gibberellins (GAs) in plants. However, the detailed mechanisms for the antagonism of these hormones during flower senescence remain elusive. In this study, we characterized one up-regulated gene PhOBF1, belonging to the basic leucine zipper transcription factor family, in senescing petals of petunia (Petunia hybrida). Exogenous treatments with ethylene and GA3 provoked a dramatic increase in PhOBF1 transcripts. Compared with wild-type plants, PhOBF1-RNAi transgenic petunia plants exhibited shortened flower longevity, while overexpression of PhOBF1 resulted in delayed flower senescence. Transcript abundances of two senescence-related genes PhSAG12 and PhSAG29 were higher in PhOBF1-silenced plants but lower in PhOBF1-overexpressing plants. Silencing and overexpression of PhOBF1 affected expression levels of a few genes involved in the GA biosynthesis and signaling pathways, as well as accumulation levels of bioactive GAs GA1 and GA3. Application of GA3 restored the accelerated petal senescence to normal levels in PhOBF1-RNAi transgenic petunia lines, and reduced ethylene release and transcription of three ethylene biosynthetic genes PhACO1, PhACS1, and PhACS2. Moreover, PhOBF1 was observed to specifically bind to the PhGA20ox3 promoter containing a G-box motif. Transient silencing of PhGA20ox3 in petunia plants through tobacco rattle virus-based virus-induced gene silencing method led to accelerated corolla senescence. Our results suggest that PhOBF1 functions as a negative regulator of ethylene-mediated flower senescence by modulating the GA production.

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Sef1, rapid-cycling Brassica napus for large-scale functional genome research in a controlled environment

et al. 2023

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Two FD homologs from London plane (Platanus acerifolia) are associated with floral initiation and flower morphology

Cited by 7 publications

References 42 publications

A bZIP transcription factor (CiFD) regulates drought‐ and low‐temperature‐induced flowering by alternative splicing in citrus

A bZIP transcription factor (CiFD) regulates drought‐ and low‐temperature‐induced flowering by alternative splicing in citrus

A petunia transcription factor, PhOBF1, regulates flower senescence by modulating gibberellin biosynthesis

Sef1, rapid-cycling Brassica napus for large-scale functional genome research in a controlled environment

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