Involvement of Rice Cryptochromes in De-etiolation Responses and Flowering

Hirose, Fumiaki; Shinomura, Tomoko; Tanabata, Takanari; Shimada, Hiroaki; Takano, Makoto

doi:10.1093/pcp/pcj064

Cited by 87 publications

(66 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tomato (Solanum lycopersicum, formerly Lycopersicon esculentum) possesses two CRY1 subfamily members, LeCRY1a and LeCRY1b (Perrotta et al, 2000(Perrotta et al, , 2001, and garden pea (Pisum sativum) contains two CRY2 subfamily members, PsCRY2a and PsCRY2b (Platten et al, 2005). The monocot rice (Oryza sativa) has four CRY genes: OsCRY1a, OsCRY1b, OsCRY2, and OsCRY-DASH (Hirose et al, 2006;Zhang et al, 2006). The N-and C-terminal domains of OsCRY1a and OsCRY1b are 7% and 19% different, respectively.…”

mentioning

confidence: 99%

“…Hirose et al (2006) showed that overexpression of OsCRY1 resulted in enhanced responsiveness to blue light, suggesting that OsCRY1 is similar to AtCRY1 in regulating photomorphogenesis. Like AtCRY2, OsCRY2 is involved in the promotion of flowering time in rice (Hirose et al, 2006). Barley (Hordeum vulgare) might have the same CRY gene composition as rice (Perrotta et al, 2001).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Wheat Cryptochromes: Subcellular Localization and Involvement in Photomorphogenesis and Osmotic Stress Responses

Xiang²,

Zhu³

et al. 2008

Plant Physiology

View full text Add to dashboard Cite

Cryptochromes (CRYs) are blue light receptors important for plant growth and development. Comprehensive information on monocot CRYs is currently only available for rice (Oryza sativa). We report here the molecular and functional characterization of two CRY genes, TaCRY1a and TaCRY2, from the monocot wheat (Triticum aestivum). The expression of TaCRY1a was most abundant in seedling leaves and barely detected in roots and germinating embryos under normal growth conditions. The expression of TaCRY2 in germinating embryos was equivalent to that in leaves and much higher than the TaCRY1a counterpart. Transition from dark to light slightly affected the expression of TaCRY1a and TaCRY2 in leaves, and red light produced a stronger induction of TaCRY1a. Treatment of seedlings with high salt, polyethylene glycol, and abscisic acid (ABA) upregulated TaCRY2 in roots and germinating embryos. TaCRY1a displays a light-responsive nucleocytoplasmic shuttling pattern similar to that of Arabidopsis (Arabidopsis thaliana) CRY1, contains nuclear localization domains in both the N and C termini, and includes information for nuclear export in its N-terminal domain. TaCRY2 was localized to the nucleus in the dark. Expression of TaCRY1a-green fluorescent protein or TaCRY2-green fluorescent protein in Arabidopsis conferred a shorter hypocotyl phenotype under blue light. These transgenic Arabidopsis plants showed higher sensitivity to high-salt, osmotic stress, and ABA treatment during germination and postgermination development, and they displayed altered expression of stress/ABAresponsive genes. The primary root growth in transgenic seedlings was less tolerant of ABA. These observations indicate that TaCRY1 and TaCRY2 might be involved in the ABA signaling pathway in addition to their role in primary blue light signal transduction.

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Wheat Cryptochromes: Subcellular Localization and Involvement in Photomorphogenesis and Osmotic Stress Responses

Xiang²,

Zhu³

et al. 2008

Plant Physiology

View full text Add to dashboard Cite

show abstract

“…[6][7][8] This indicates conserved CRY signaling in monocots and dicots. However, the underlying mechanisms may not be identical.…”

mentioning

confidence: 88%

Plant cryptochromes employ complicated mechanisms for subcellular localization and are involved in pathways apart from photomorphogenesis

2009

Plant Signaling & Behavior

View full text Add to dashboard Cite

“…In rice, three cryptochromes, OsCRY1a, OsCRY1b and OsCRY2, have been identified and only the latter is involved in the promotion of flowering time (Hirose et al, 2006). In tomato, overexpression or silencing of CRY2 had no effect on the developmental timing of the transition to flowering, although the rate of leaf production was altered causing a delayed appearance of flowers (Giliberto et al, 2005).…”

Section: Blue Light Receptorsmentioning

confidence: 99%

Photoperiodic control of flowering time: a review

Jarillo¹,

Olmo²,

Gómez-Zambrano³

et al. 2008

Span. j. agric. res.

View full text Add to dashboard Cite

The rotation of the earth results in periodic changes in environmental factors such as daylength and temperature; the circadian clock is the endogenous mechanism responsible for day-length measurement, and allows plants to anticipate these fluctuations and modulate their developmental programs to maximize adaptation to those environmental cues. Flowering represents the transition from a vegetative to reproductive phase and is controlled by complex and highly regulated genetic pathways. In many plants, the time of flowering is strongly influenced by photoperiod, which synchronizes the floral transition with the favourable season of the year. Over the last decade, genetic approaches have aided the discovery of many signalling components involved in the photoperiod pathway and here, we highlight the significant progress made in identifying the molecular mechanisms that measure daylength and control flowering initiation in Arabidopsis, a long day (LD) plant, and in rice, a short day (SD) plant. Some components of the Arabidopsis regulatory network are conserved in other species, but the difference in the function of particular genes may contribute to the opposite photoperiodic flowering response observed between LD and SD plants. The specific regulatory mechanisms involved in controlling CONSTANS (CO) expression and stability by the circadian clock and the different photoreceptors will be described. In addition, the role of FLOWERING LOCUS T (FT), as part of the florigen, and several other light signalling and circadian-dependent components in photoperiodic flowering will be also discussed.Additional key words: circadian clock, CONSTANS, florigen, FT, photoperiodism, photoreceptors. Resumen Revisión. Control fotoperiódico del tiempo de floraciónLa rotación diaria de la tierra provoca cambios periódicos en la duración del día o en la temperatura, y el reloj circadiano es un mecanismo endógeno responsable de la medida de la duración del día; este oscilador molecular permite a los organismos anticiparse a dichos cambios y adaptar su desarrollo de manera adecuada. La floración representa la transición desde una fase vegetativa del crecimiento a una reproductiva, y está controlada por diferentes rutas, muy complejas y altamente reguladas. En muchas plantas, esta transición está controlada principalmente por la duración del día o fotoperiodo, el cual sincroniza la floración con la estación más favorable del año. En la última década, diferentes estudios genéticos han facilitado la caracterización de muchos componentes de señalización involucrados en la ruta del fotoperiodo y en esta revisión se discute el progreso reciente que se ha llevado a cabo en la identificación de los mecanismos moleculares que permiten medir la duración del día, y que controlan el tiempo de floración en Arabidopsis, una especie de día largo, y en arroz, un especie de día corto. Aunque los componentes de las rutas reguladoras de Arabidopsis parecen conservarse en otras especies, la diferencia de función de genes concretos parece contribuir a...

show abstract

Involvement of Rice Cryptochromes in De-etiolation Responses and Flowering

Cited by 87 publications

References 44 publications

Wheat Cryptochromes: Subcellular Localization and Involvement in Photomorphogenesis and Osmotic Stress Responses

Wheat Cryptochromes: Subcellular Localization and Involvement in Photomorphogenesis and Osmotic Stress Responses

Plant cryptochromes employ complicated mechanisms for subcellular localization and are involved in pathways apart from photomorphogenesis

Photoperiodic control of flowering time: a review

Contact Info

Product

Resources

About