<i>FPF1 </i>modulates the competence to flowering in <i> Arabidopsis</i>

Melzer, Siegbert; Kampmann, Grit; Chandler, John W.; Apel, Klaus

doi:10.1046/j.1365-313x.1999.00461.x

Cited by 62 publications

(55 citation statements)

References 53 publications

(76 reference statements)

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“…This specific effect on the duration of the juvenile phase is unusual. Other flowering time mutations whose effect on vegetative phase change has been studied have either no effect on the duration of the juvenile phase (Martinez-Zapater et al, 1995;Melzer et al, 1999;Scott et al, 1999;Telfer et al, 1997;Weigel and Nilsson, 1995) or affect the duration of both the juvenile and adult phases of development (Gomez-Mena et al, 2001;Soppe et al, 1999;Telfer et al, 1997). hst-1 is also unusual in that it has a completely opposite effect on flowering time in SD.…”

Section: Discussionmentioning

confidence: 99%

HASTY, theArabidopsisortholog of exportin 5/MSN5, regulates phase change and morphogenesis

et al. 2003

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Loss-of-function mutations of HASTY (HST) affect many different processes in Arabidopsis development. In addition to reducing the size of both roots and lateral organs of the shoot, hstmutations affect the size of the shoot apical meristem, accelerate vegetative phase change, delay floral induction under short days, adaxialize leaves and carpels, disrupt the phyllotaxis of the inflorescence, and reduce fertility. Double mutant analysis suggests that HST acts in parallel toSQUINT in the regulation of phase change and in parallel toKANADI in the regulation of leaf polarity. Positional cloning demonstrated that HST is the Arabidopsis ortholog of the importin β-like nucleocytoplasmic transport receptors exportin 5in mammals and MSN5 in yeast. Consistent with a potential role in nucleocytoplasmic transport, we found that HST interacts with RAN1 in a yeast two-hybrid assay and that a HST-GUS fusion protein is located at the periphery of the nucleus. HST is one of at least 17 members of the importin-βfamily in Arabidopsis and is the first member of this family shown to have an essential function in plants. The hst loss-of-function phenotype suggests that this protein regulates the nucleocytoplasmic transport of molecules involved in several different morphogenetic pathways, as well as molecules generally required for root and shoot growth.

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Section: Discussionmentioning

confidence: 99%

HASTY, theArabidopsisortholog of exportin 5/MSN5, regulates phase change and morphogenesis

et al. 2003

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“…It was indicated that FPF1 is involved in the GA-dependent signaling pathway (Kania et al, 1997), and it may work synergistically with AP1 and LFY to modulate the competence to flowering in the shoot apical meristem (Melzer et al, 1999). It can promote flowering in Arabidopsis (Kania et al, 1997).…”

Section: Discussionmentioning

confidence: 99%

Overexpression of OsRAA1 Causes Pleiotropic Phenotypes in Transgenic Rice Plants, including Altered Leaf, Flower, and Root Development and Root Response to Gravity

et al. 2004

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There are very few root genes that have been described in rice as a monocotyledonous model plant so far. Here, the OsRAA1 (Oryza sativa Root Architecture Associated 1) gene has been characterized molecularly. OsRAA1 encodes a 12.0-kD protein that has 58% homology to the AtFPF1 (Flowering Promoting Factor 1) in Arabidopsis, which has not been reported as modulating root development yet. Data of in situ hybridization and OsRAA1::GUS transgenic plant showed that OsRAA1 expressed specifically in the apical meristem, the elongation zone of root tip, steles of the branch zone, and the young lateral root. Constitutive expression of OsRAA1 under the control of maize (Zea mays) ubiquitin promoter resulted in phenotypes of reduced growth of primary root, increased number of adventitious roots and helix primary root, and delayed gravitropic response of roots in seedlings of rice (Oryza sativa), which are similar to the phenotypes of the wild-type plant treated with auxin. With overexpression of OsRAA1, initiation and growth of adventitious root were more sensitive to treatment of auxin than those of the control plants, while their responses to 9-hydroxyfluorene-9-carboxylic acid in both transgenic line and wild type showed similar results. OsRAA1 constitutive expression also caused longer leaves and sterile florets at the last stage of plant development. Analysis of northern blot and GUS activity staining of OsRAA1::GUS transgenic plants demonstrated that the OsRAA1 expression was induced by auxin. At the same time, overexpression of OsRAA1 also caused endogenous indole-3-acetic acid to increase. These data suggested that OsRAA1 as a new gene functions in the development of rice root systems, which are mediated by auxin. A positive feedback regulation mechanism of OsRAA1 to indole-3-acetic acid metabolism may be involved in rice root development in nature.The growth and development of crops depend on their roots to take up water and nutrient material from soil. The root system of rice (Oryza sativa) consists of embryonic and postembryonic roots. The rice embryonic roots, originating from the radical, emerge after germination. They develop into two forms, one primary root and several seminal roots. Postembryonic roots include adventitious roots that are formed from nodes of the plant and lateral roots that develop on all root types.As is known, plant hormone auxin (indole-3-acetic acid [IAA]) plays an important role in controlling root development, such as inhibiting elongation of a primary root and promoting formation of adventitious roots, lateral roots, and root hairs. In Arabidopsis, it has been reported that genes involved in the auxin signal transduction pathway are able to control the development of roots. For example, mutants of the AUX/IAA gene family, such as SHY2/IAA3, SLR1/ IAA14, IAA28, and MSG2/IAA19, show reduced lateral roots or no lateral roots (for review, see Reed, 2001). Overexpression of AUX1, TIR1, or NAC1 can promote lateral root development (Gray et al., 1999;Xie et al., 2000;Marchant et al., 2002). ...

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“…AGL24, FPF1, and SPL9 promote flowering (Kania et al, 1997;Melzer et al, 1999;Michaels et al, 2003;Schwarz et al, 2008;Wang et al, 2009), whereas FLC, TEM1, TFL1, MAF2, and MAF3 repress flowering (Michaels and Amasino, 1999;Ratcliffe et al, 2003;Castillejo and Pelaz, 2008).…”

Section: Flowering-time Genesmentioning

confidence: 99%

EMBRYONIC FLOWER1 and ULTRAPETALA1 Act Antagonistically on Arabidopsis Development and Stress Response

Liu

Kim

et al. 2013

Plant Physiology

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Epigenetic regulation of gene expression is of fundamental importance for eukaryotic development. EMBRYONIC FLOWER1 (EMF1) is a plant-specific gene that participates in Polycomb group-mediated transcriptional repression of target genes such as the flower MADS box genes AGAMOUS, APETALA3, and PISTILLATA. Here, we investigated the molecular mechanism underlying the curly leaf and early flowering phenotypes caused by reducing EMF1 activity in the leaf primordia of LFYasEMF1 transgenic plants and propose a combined effect of multiple flower MADS box gene activities on these phenotypes. ULTRAPETALA1 (ULT1) functions as a trithorax group factor that counteracts Polycomb group action in Arabidopsis (Arabidopsis thaliana). Removing ULT1 activity rescues both the abnormal developmental phenotypes and most of the misregulated gene expression of LFYasEMF1 plants. Reducing EMF1 activity increases salt tolerance, an effect that is diminished by introducing the ult1-3 mutation into the LFYasEMF1 background. EMF1 is required for trimethylating lysine-27 on histone 3 (H3K27me3), and ULT1 associates with ARABIDOPSIS TRITHORAX1 (ATX1) for trimethylating lysine-3 on histone 4 (H3K4me3) at flower MADS box gene loci. Reducing EMF1 activity decreases H3K27me3 marks and increases H3K4me3 marks on target gene loci. Removing ULT1 activity has the opposite effect on the two histone marks. Removing both gene activities restores the active and repressive marks to near wild-type levels. Thus, ULT1 acts as an antirepressor that counteracts EMF1 action through modulation of histone marks on target genes. Our analysis indicates that, instead of acting as off and on switches, EMF1 and ULT1 mediate histone mark deposition and modulate transcriptional activities of the target genes.

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FPF1 modulates the competence to flowering in Arabidopsis

Cited by 62 publications

References 53 publications

HASTY, theArabidopsisortholog of exportin 5/MSN5, regulates phase change and morphogenesis

HASTY, theArabidopsisortholog of exportin 5/MSN5, regulates phase change and morphogenesis

Overexpression of OsRAA1 Causes Pleiotropic Phenotypes in Transgenic Rice Plants, including Altered Leaf, Flower, and Root Development and Root Response to Gravity

EMBRYONIC FLOWER1 and ULTRAPETALA1 Act Antagonistically on Arabidopsis Development and Stress Response

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