Jae Yong Ryu" /> Jae Yong Ryu, Chung-Mo Park*, and Pil Joon Seo*

" /> Jae Yong Ryu, Chung-Mo Park*, and Pil Joon Seo*

. Mol. Cells 2011;32:295-303. https://doi.org/10.1007/s10059-011-0112-9">
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Mol. Cells 2011; 32(3): 295-303

Published online September 30, 2011

https://doi.org/10.1007/s10059-011-0112-9

© The Korean Society for Molecular and Cellular Biology

The Floral Repressor BROTHER OF FT AND TFL1 (BFT) Modulates Flowering Initiation under High Salinity in Arabidopsis

Jae Yong Ryu1, Chung-Mo Park1,2,*, and Pil Joon Seo1,*

1Department of Chemistry, Seoul National University, Seoul 151-742, Korea, 2Plant Genomics and Breeding Institute, Seoul National University, Seoul 151-742, Korea

Correspondence to : *Correspondence: dualnt83@snu.ac.kr (PJS); cmpark@snu.ac.kr (CMP)

Received: May 16, 2011; Revised: June 17, 2011; Accepted: June 30, 2011

Abstract

Floral transition is coordinately regulated by both endo-genous and exogenous cues to ensure reproductive suc-cess under fluctuating environmental conditions. Abiotic stress conditions, including drought and high salinity, also have considerable influence on this developmental process. However, the signaling components and molecular mecha-nisms underlying the regulation of floral transition by environmental factors have not yet been defined. In this work, we show that the Arabidopsis BROTHER OF FT AND TFL1 (BFT) gene, which encodes a member of the FLOWERING LOCUS T (FT)/TERMINAL FLOWER 1 (TFL1) family, regulates floral transition under conditions of high salinity. The BFT gene was transcrip-tionally induced by high salinity in an abscisic acid (ABA)-dependent manner. Transgenic plants overexpressing the BFT gene (35S:BFT) and BFT-deficient mutant (bft-2) plants were phenotypically indistinguishable from Col-0 plants in seed germination and seedling growth under high salinity. In contrast, al-though the floral transition was delayed significantly in Col-0 plants under high salinity, that of the bft-2 mutant was not affected by high salinity. We also observed that expression of the APETALA1 (AP1) gene was suppressed to a lesser degree in the bft-2 mutant than in Col-0 plants. Taken together, our observations suggest that BFT me-diates salt stress-responsive flowering, providing an adaptive strategy that ensures reproductive success under unfavorable stress conditions.

Keywords abscisic acid, Arabidopsis, BFT, flowering, salt stress

Article

Research Article

Mol. Cells 2011; 32(3): 295-303

Published online September 30, 2011 https://doi.org/10.1007/s10059-011-0112-9

Copyright © The Korean Society for Molecular and Cellular Biology.

The Floral Repressor BROTHER OF FT AND TFL1 (BFT) Modulates Flowering Initiation under High Salinity in Arabidopsis

Jae Yong Ryu1, Chung-Mo Park1,2,*, and Pil Joon Seo1,*

1Department of Chemistry, Seoul National University, Seoul 151-742, Korea, 2Plant Genomics and Breeding Institute, Seoul National University, Seoul 151-742, Korea

Correspondence to:*Correspondence: dualnt83@snu.ac.kr (PJS); cmpark@snu.ac.kr (CMP)

Received: May 16, 2011; Revised: June 17, 2011; Accepted: June 30, 2011

Abstract

Floral transition is coordinately regulated by both endo-genous and exogenous cues to ensure reproductive suc-cess under fluctuating environmental conditions. Abiotic stress conditions, including drought and high salinity, also have considerable influence on this developmental process. However, the signaling components and molecular mecha-nisms underlying the regulation of floral transition by environmental factors have not yet been defined. In this work, we show that the Arabidopsis BROTHER OF FT AND TFL1 (BFT) gene, which encodes a member of the FLOWERING LOCUS T (FT)/TERMINAL FLOWER 1 (TFL1) family, regulates floral transition under conditions of high salinity. The BFT gene was transcrip-tionally induced by high salinity in an abscisic acid (ABA)-dependent manner. Transgenic plants overexpressing the BFT gene (35S:BFT) and BFT-deficient mutant (bft-2) plants were phenotypically indistinguishable from Col-0 plants in seed germination and seedling growth under high salinity. In contrast, al-though the floral transition was delayed significantly in Col-0 plants under high salinity, that of the bft-2 mutant was not affected by high salinity. We also observed that expression of the APETALA1 (AP1) gene was suppressed to a lesser degree in the bft-2 mutant than in Col-0 plants. Taken together, our observations suggest that BFT me-diates salt stress-responsive flowering, providing an adaptive strategy that ensures reproductive success under unfavorable stress conditions.

Keywords: abscisic acid, Arabidopsis, BFT, flowering, salt stress

Mol. Cells
Aug 31, 2022 Vol.45 No.8, pp. 513~602
COVER PICTURE
Cryo-EM structure of human porphyrin transporter ABCB6 (main figure) shows that binding of hemin (inset, magenta) in concert with two glutathione molecules (cyan) primes ABCB6 for high ATP turnover (Kim et al., pp. 575-587).

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