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Journal Articles

Double loss-of-function mutation in ${it EARLY FLOWERING 3}$ and ${it CRYPTOCHROME 2}$ genes delays flowering under continuous light but accelerates it under long days and short days; An Important role for ${it Arabidopsis}$ CRY2 to accelerate flowering time in continuous light

Nefissi, R.*; Natsui, Yu*; Miyata, Kana*; Oda, Atsushi*; Hase, Yoshihiro; Nakagawa, Mayu*; Ghorbel, A.*; Mizoguchi, Tsuyoshi*

Journal of Experimental Botany, 62(8), p.2731 - 2744, 2011/02

https://doi.org/10.1093/jxb/erq450
 Times Cited Count：18 Percentile：49.43(Plant Sciences)

no abstracts in English

Journal Articles

Isolation and characterization of suppressors of the ${it early flowering 3}$ in ${it Arabidopsis thaliana}$

Natsui, Yu*; Nefissi, R.*; Miyata, Kana*; Oda, Atsushi*; Hase, Yoshihiro; Nakagawa, Mayu*; Mizoguchi, Tsuyoshi*

Plant Biotechnology, 27(5), p.463 - 468, 2010/12

https://doi.org/10.5511/plantbiotechnology.10.0722a
 Times Cited Count：4 Percentile：15.29(Biotechnology & Applied Microbiology)

EARLY FLOWERING 3 (ELF3) is a circadian clock protein with a major role in maintaining circadian rhythms in plants. In this work, ${it elf3-101}$ was mutagenized by EMS in plants of the Lansberg ${it erecta}$ background to isolate suppressors of ${it elf3}$ and to understand the molecular mechanisms of flowering time controlled by ELF3. Two suppressors, ${it sel106}$ obtained from this screen and ${it sel5}$ from a precious study, were chosen for further analysis. Genetic mapping, gene expression analysis, and sequencing identified ${it sel106}$ and ${it sel5}$ as new alleles of ${it gi}$ and ${it fca}$, respectively. Genetic interactions between ${it elf3}$ and ${it gi}$ and between ${it elf3}$ and ${it fca}$ in the control of the floral activator ${it FLOWERING LOCUS T}$ were also investigated. Six suppressor of ${it elf3}$ were classified at least into four subgroups based on the expression of such floral regulators as GI, CO, FT, SVP, and FLC, and on their flowering times under LL, LD, and SD. This classification scheme is useful for the characterization of unidentified suppressor mutations.

Oral presentation

Suppression of phenotypes of the clock mutant early flowering 3 (elf3) by a deletion allele of fha/cry2 mutation in Arabidopsis

Natsui, Yu*; Nefissi, R.*; Miyata, Kana*; Oda, Atsushi*; Hase, Yoshihiro; Nakagawa, Mayu; Mizoguchi, Tsuyoshi*

no journal, , 

EARLY FLOWERING 3 (ELF3) plays key roles in the control of light response, organ elongation, flowering time and circadian rhythms in Arabidopsis. ELF3 does not show significant homology to any other proteins in the public databases. Therefore biochemical function of the ELF3 has not been well understood. To understand molecular mechanisms underlying the a variety of phenotypes in the elf3 mutants, suppressors of elf3-1 were screened for, using the elf3-1 seeds mutagenized with heavy ion beams. Here we demonstrate that in one of the suppressor lines, S#20, early flowering, small cotyledon and pale green phenotypes of elf3-1 were suppressed, whereas long hypocotyl phenotype was enhanced. The recessive suppressor mutation was named suppressor of elf3 20 (sel20) and mapped to the upper side of Ch1. We have found 21-bp deletion in the FHA/CRY2 gene in the sel20. We will discuss possible roles of CRY2 in the multiple functions of ELF3.

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