Gibberellin promotes flowering of chrysanthemum by upregulating CmFL, a chrysanthemum FLORICAULA/LEAFY homologous gene

Sumitomo, Katsuhiko; Li, Tuoping; Hashizume, Tamotsu

doi:10.1016/j.plantsci.2009.02.003

Cited by 26 publications

(23 citation statements)

References 35 publications

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“…Stems were noticeably longer in plants obtained from the cold-treated stock plants of these cultivars, because premature budding had been prevented and the plants continued vegetative growth during the night-break periods. Moreover, cold pre-treatment stimulated stem elongation, as reported previously (Vince and Mason, 1959;Sumitomo et al, 2009). This contributed to an increase in the stem lengths of these cultivars and also in cultivars with no premature budding.…”

Section: Long-day Leaf Number and Cold Effects On Chrysanthemum Expersupporting

confidence: 83%

Identification of high long-day leaf number cultivars and prevention of premature budding by cold pre-treatment for fine control of flowering in summer-to-autumn-flowering chrysanthemum (Chrysanthemum morifoliumRamat.)

Sumitomo

Yamagata

Oda

et al. 2014

The Journal of Horticultural Science and Biotechnology

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Section: Long-day Leaf Number and Cold Effects On Chrysanthemum Expersupporting

confidence: 83%

Identification of high long-day leaf number cultivars and prevention of premature budding by cold pre-treatment for fine control of flowering in summer-to-autumn-flowering chrysanthemum (Chrysanthemum morifoliumRamat.)

Sumitomo

Yamagata

Oda

et al. 2014

The Journal of Horticultural Science and Biotechnology

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“…1E). Hence, JcLFY was not induced by GA in Jatropha , in contrast with Arabidopsis 3435 and Chrysanthemum 44.…”

Section: Resultsmentioning

confidence: 81%

An ortholog of LEAFY in Jatropha curcas regulates flowering time and floral organ development

Tang

Tao

et al. 2016

Sci Rep

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Jatropha curcas seeds are an excellent biofuel feedstock, but seed yields of Jatropha are limited by its poor flowering and fruiting ability. Thus, identifying genes controlling flowering is critical for genetic improvement of seed yield. We isolated the JcLFY, a Jatropha ortholog of Arabidopsis thaliana LEAFY (LFY), and identified JcLFY function by overexpressing it in Arabidopsis and Jatropha. JcLFY is expressed in Jatropha inflorescence buds, flower buds, and carpels, with highest expression in the early developmental stage of flower buds. JcLFY overexpression induced early flowering, solitary flowers, and terminal flowers in Arabidopsis, and also rescued the delayed flowering phenotype of lfy-15, a LFY loss-of-function Arabidopsis mutant. Microarray and qPCR analysis revealed several flower identity and flower organ development genes were upregulated in JcLFY-overexpressing Arabidopsis. JcLFY overexpression in Jatropha also induced early flowering. Significant changes in inflorescence structure, floral organs, and fruit shape occurred in JcLFY co-suppressed plants in which expression of several flower identity and floral organ development genes were changed. This suggests JcLFY is involved in regulating flower identity, floral organ patterns, and fruit shape, although JcLFY function in Jatropha floral meristem determination is not as strong as that of Arabidopsis.

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“…In its natural setting, chrysanthemum flower bud initiation occurs eventually in all cultivars, even when grown in LD, but this may take many months in unvernalized shoots of cold-requiring cultivars (Cockshull, 1985). Flowering time of chrysanthemum is also influenced by several plant hormones (Cockshull, 1985), and among them GAs have been documented as promoting chrysanthemum flowering under LD (Pharis, 1972;Sumitomo et al, 2009). In this study, the Cm-BBX24-RNAi chrysanthemum clearly exhibited early flowering in LD, and RNA-seq analyses revealed that some key GA biosynthesis genes, such as GA20ox and GA3ox, as well as those genes associated with downstream GA signaling, such as a GRP, GRAS, and FPF1, were upregulated in Cm-BBX24-RNAi plants, relative to wild-type plants ( Table 1).…”

Section: Involvement Of Cm-bbx24 In the Regulation Of Flowering Timementioning

confidence: 99%

A Zinc Finger Protein Regulates Flowering Time and Abiotic Stress Tolerance in Chrysanthemum by Modulating Gibberellin Biosynthesis

et al. 2014

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Flowering time and an ability to tolerate abiotic stresses are important for plant growth and development. We characterized BBX24, a zinc finger transcription factor gene, from Chrysanthemum morifolium and found it to be associated with both flowering time and stress tolerance. Transgenic lines with suppressed expression of Cm-BBX24 (Cm-BBX24-RNAi) flowered earlier than wild-type plants and showed decreased tolerance to freezing and drought stresses. Global expression analysis revealed that genes associated with both photoperiod and gibberellin (GA) biosynthesis pathways were upregulated in Cm-BBX24-RNAi lines, relative to the wild type. By contrast, genes that were upregulated in overexpressing lines (Cm-BBX24-OX), but downregulated in Cm-BBX24-RNAi lines (both relative to the wild type), included genes related to compatible solutes and carbohydrate metabolism, both of which are associated with abiotic stress. Cm-BBX24 expression was also influenced by daylength and GA 4/7 application. Under long days, changes in endogenous GA 1 , GA 4 , GA 19 , and GA 20 levels occurred in young leaves of transgenic lines, relative to the wild type. Regulation of flowering involves the FLOWERING TIME gene, which integrates photoperiod and GA biosynthesis pathways. We postulate that Cm-BBX24 plays a dual role, modulating both flowering time and abiotic stress tolerance in chrysanthemum, at least in part by influencing GA biosynthesis.

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Gibberellin promotes flowering of chrysanthemum by upregulating CmFL, a chrysanthemum FLORICAULA/LEAFY homologous gene

Cited by 26 publications

References 35 publications

Identification of high long-day leaf number cultivars and prevention of premature budding by cold pre-treatment for fine control of flowering in summer-to-autumn-flowering chrysanthemum (Chrysanthemum morifoliumRamat.)

Identification of high long-day leaf number cultivars and prevention of premature budding by cold pre-treatment for fine control of flowering in summer-to-autumn-flowering chrysanthemum (Chrysanthemum morifoliumRamat.)

An ortholog of LEAFY in Jatropha curcas regulates flowering time and floral organ development

A Zinc Finger Protein Regulates Flowering Time and Abiotic Stress Tolerance in Chrysanthemum by Modulating Gibberellin Biosynthesis

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