| RRC ID |
60877
|
| 著者 |
Oda A, Narumi T, Li T, Kando T, Higuchi Y, Sumitomo K, Fukai S, Hisamatsu T.
|
| タイトル |
CsFTL3, a chrysanthemum FLOWERING LOCUS T-like gene, is a key regulator of photoperiodic flowering in chrysanthemums.
|
| ジャーナル |
J Exp Bot
|
| Abstract |
Chrysanthemum is a typical short-day (SD) plant that responds to shortening daylength during the transition from the vegetative to the reproductive phase. FLOWERING LOCUS T (FT)/Heading date 3a (Hd3a) plays a pivotal role in the induction of phase transition and is proposed to encode a florigen. Three FT-like genes were isolated from Chrysanthemum seticuspe (Maxim.) Hand.-Mazz. f. boreale (Makino) H. Ohashi & Yonek, a wild diploid chrysanthemum: CsFTL1, CsFTL2, and CsFTL3. The organ-specific expression patterns of the three genes were similar: they were all expressed mainly in the leaves. However, their response to daylength differed in that under SD (floral-inductive) conditions, the expression of CsFTL1 and CsFTL2 was down-regulated, whereas that of CsFTL3 was up-regulated. CsFTL3 had the potential to induce early flowering since its overexpression in chrysanthemum could induce flowering under non-inductive conditions. CsFTL3-dependent graft-transmissible signals partially substituted for SD stimuli in chrysanthemum. The CsFTL3 expression levels in the two C. seticuspe accessions that differed in their critical daylengths for flowering closely coincided with the flowering response. The CsFTL3 expression levels in the leaves were higher under floral-inductive photoperiods than under non-inductive conditions in both the accessions, with the induction of floral integrator and/or floral meristem identity genes occurring in the shoot apexes. Taken together, these results indicate that the gene product of CsFTL3 is a key regulator of photoperiodic flowering in chrysanthemums.
|
| 巻・号 |
63(3)
|
| ページ |
1461-77
|
| 公開日 |
2012-2-1
|
| DOI |
10.1093/jxb/err387
|
| PII |
err387
|
| PMID |
22140240
|
| PMC |
PMC3276106
|
| MeSH |
Chrysanthemum / genetics
Chrysanthemum / metabolism*
Chrysanthemum / physiology*
Flowers / genetics
Flowers / metabolism*
Flowers / physiology*
Gene Expression Regulation, Plant / genetics
Gene Expression Regulation, Plant / physiology
Photoperiod*
Plant Proteins / genetics
Plant Proteins / metabolism*
|
| IF |
5.36
|
| 引用数 |
74
|
| リソース情報 |
| 広義キク属 |
NIFS-3 |
