Role of SEPALLATA3 (SEP3) as a downstream gene of miR156-SPL3-FT circuitry in ambient temperature-responsive flowering

Jeong Hwan Lee; Jae Joon Kim; Ji Hoon Ahn

doi:10.4161/psb.21366

Role of SEPALLATA3 (SEP3) as a downstream gene of miR156-SPL3-FT circuitry in ambient temperature-responsive flowering

Jeong Hwan Lee, Jae Joon Kim, Ji Hoon Ahn

Department of Life Sciences

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

SEPALLATA3 (SEP3) is important in determining flowering time as well as floral organ identity. although much is known about the regulation of floral organ identity by SEP3, its role as a downstream gene of FLOWERING LOCUS T (FT) for the regulation of ambient temperature-responsive flowering is poorly understood. here, we show that SEP3 as a downstream gene of SQUAMOSA PROMOTER BINDING PROTEIN-LIKE3 (SPL3) and FT modulates the flowering time in response to different ambient temperatures. SEP3 overexpression showed temperature-insensitive flowering at 23°C and 16°C. this suggests that altered SEP3 activity affects ambient temperature-responsive flowering. however, a lesion in SEP3 did not obviously affect ambient temperature-responsive flowering. SEP3 expression was affected by altered SPL3 and FT activities in the leaf and shoot apical regions at different temperatures. these results suggest that the miR156-SPL3-FT circuitry directly or indirectly regulates SEP3 expression for the regulation of ambient temperature-responsive flowering in Arabidopsis.

Original language	English
Pages (from-to)	1151-1154
Number of pages	4
Journal	Plant Signaling and Behavior
Volume	7
Issue number	9
DOIs	https://doi.org/10.4161/psb.21366
Publication status	Published - 2012 Sept

Bibliographical note

Funding Information:
This work was supported by the Creative Research Initiatives of the National Research Foundation for the Ministry of Education, Science and Technology (R16–2008–106–01000–0 to J.H.A.) and by the Brain Korea 21 program (to J.H.L).

Keywords

Ambient temperature
Flowering time
SEP3
miR156-SPL3-FT circuitry

ASJC Scopus subject areas

Plant Science

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10.4161/psb.21366

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title = "Role of SEPALLATA3 (SEP3) as a downstream gene of miR156-SPL3-FT circuitry in ambient temperature-responsive flowering",

abstract = "SEPALLATA3 (SEP3) is important in determining flowering time as well as floral organ identity. although much is known about the regulation of floral organ identity by SEP3, its role as a downstream gene of FLOWERING LOCUS T (FT) for the regulation of ambient temperature-responsive flowering is poorly understood. here, we show that SEP3 as a downstream gene of SQUAMOSA PROMOTER BINDING PROTEIN-LIKE3 (SPL3) and FT modulates the flowering time in response to different ambient temperatures. SEP3 overexpression showed temperature-insensitive flowering at 23°C and 16°C. this suggests that altered SEP3 activity affects ambient temperature-responsive flowering. however, a lesion in SEP3 did not obviously affect ambient temperature-responsive flowering. SEP3 expression was affected by altered SPL3 and FT activities in the leaf and shoot apical regions at different temperatures. these results suggest that the miR156-SPL3-FT circuitry directly or indirectly regulates SEP3 expression for the regulation of ambient temperature-responsive flowering in Arabidopsis.",

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author = "Lee, {Jeong Hwan} and Kim, {Jae Joon} and Ahn, {Ji Hoon}",

note = "Funding Information: This work was supported by the Creative Research Initiatives of the National Research Foundation for the Ministry of Education, Science and Technology (R16–2008–106–01000–0 to J.H.A.) and by the Brain Korea 21 program (to J.H.L).",

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AU - Ahn, Ji Hoon

N1 - Funding Information: This work was supported by the Creative Research Initiatives of the National Research Foundation for the Ministry of Education, Science and Technology (R16–2008–106–01000–0 to J.H.A.) and by the Brain Korea 21 program (to J.H.L).

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AB - SEPALLATA3 (SEP3) is important in determining flowering time as well as floral organ identity. although much is known about the regulation of floral organ identity by SEP3, its role as a downstream gene of FLOWERING LOCUS T (FT) for the regulation of ambient temperature-responsive flowering is poorly understood. here, we show that SEP3 as a downstream gene of SQUAMOSA PROMOTER BINDING PROTEIN-LIKE3 (SPL3) and FT modulates the flowering time in response to different ambient temperatures. SEP3 overexpression showed temperature-insensitive flowering at 23°C and 16°C. this suggests that altered SEP3 activity affects ambient temperature-responsive flowering. however, a lesion in SEP3 did not obviously affect ambient temperature-responsive flowering. SEP3 expression was affected by altered SPL3 and FT activities in the leaf and shoot apical regions at different temperatures. these results suggest that the miR156-SPL3-FT circuitry directly or indirectly regulates SEP3 expression for the regulation of ambient temperature-responsive flowering in Arabidopsis.

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Role of SEPALLATA3 (SEP3) as a downstream gene of miR156-SPL3-FT circuitry in ambient temperature-responsive flowering

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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