Red, green and blue light photoreceptors controlling chlorophylla, biliprotein and total protein synthesis in the red algaChondrus crispus

López‐Figueroa, F.

doi:10.1080/00071619100650351

Cited by 29 publications

(14 citation statements)

References 43 publications

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“…This reorganization results in a different light absorption spectrum, given that phycoerythrin absorbs light in the green and blue regions of the visible spectrum and phycocyanin in the red (Glazer, 1985;López-Figueroa, 1991). Therefore, it can be surmised that the green strain increased its phycocyanin/phycoerythrin ratio in order to modify its response to incident light, thereby optimizing and preserving the functioning of the photosynthetic apparatus.…”

Section: Discussionmentioning

confidence: 99%

Seasonal changes in the pigment composition of natural population of Gracilaria domingensis (Gracilariales, Rhodophyta)

Pereira

Trigueiro²,

Colepicolo

et al. 2012

Rev. bras. farmacogn.

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Abstract:The concentrations of phycobiliproteins (phycoerythrin and phycocyanin), chlorophyll-a and total soluble proteins were determined monthly in three strains (red, green and brown) of Gracilaria domingensis (Kützing) Sonder ex Dickie, collected from natural populations on the coast of Rio Grande do Norte, Brazil. In all the strains, pigment and protein concentrations were higher in the months of less sunlight and greater nitrogen availability and decreased gradually with increased sunlight and decreased nutrient concentration. The red strain showed higher concentrations of phycoerythrin and total soluble proteins. The difference in the concentration of biochemical components over the course of the year indicates species acclimation to different environmental conditions.

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Section: Discussionmentioning

confidence: 99%

Seasonal changes in the pigment composition of natural population of Gracilaria domingensis (Gracilariales, Rhodophyta)

Pereira

Trigueiro²,

Colepicolo

et al. 2012

Rev. bras. farmacogn.

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“…For G. birdiae, we have suggested a proportionally greater increase of the external part of phycobilisome in BL in contrast to RD, thus increasing the potential for a possible package effect, much like P. umbilicalis under BL light. Considering the high PE and PC contents in G. birdiae, a higher BL-enhanced production in pigment proteins is suggested, similar to Chondrus crispus (López-Figueroa 1991) and P. umbilicalis (Figueroa et al 1995a). BL could also stimulate the accumulation of nitrogen compounds in G. birdiae, such as PE and PC, and the resultant higher density of phycobilisomes under BL than that observed under RD and GR, as reported in P. leucosticta (Tsekos et al 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Blue light also stimulated nitrogen assimilation and the accumulation of such N-compounds as biliproteins (Figueroa et al 1995a). These alterations in red alga pigment content may be related to the size and amount of chromophores, as well as the number, structure or size of phycobilisomes, which are modified to optimize light absorption (Kursar et al 1983b, López-Figueroa and Niell 1989, 1991. Furthermore, the synthesis of chlorophyll and biliprotein can be regulated by phytochrome (red/far-red light) and blue light photoreceptors (López-Figueroa and Niell 1991).…”

Section: Introductionmentioning

confidence: 99%

Effects of light quality on reproduction, growth and pigment content of Gracilaria birdiae (Rhodophyta: Gracilariales)

Barufi¹,

Figueroa²,

Plastino³

2015

Sci. Mar.

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Summary: Gracilaria species are the main source of agar worldwide. Since laboratory cultivation is an important means of sustaining such production, this study aimed to assess the influence of two fundamental strategies of physiological algae adjustment, photoacclimation and photomorphogenesis, on G. birdiae physiology. Specifically, the effects of different spectral light qualities on reproduction, growth, and pigment content in two distinct photoperiods (8 and 14 hours) were examined. Tetrasporophytes and gametophytes were submitted to different light qualities: white, green, red, and blue over the course of nine weeks. At the end of this period, chlorophyll a, allophycocyanin, phycocyanin, and phycoerythrin contents were analysed. Gametophytes showed reproductive structures only under monochromatic radiation. A stimulatory effect on tetrasporangium differentiation was mainly observed under red light, but this high fertility was negatively correlated with growth rate, i.e. algae cultivated under red light showed the lowest growth rate. However, while growth rates were higher in algae exposed to white light, they were similar to those observed in algae subjected to green light and 14 hours of daylight. PE was the predominant pigment, irrespective of light quality. Phycocyanin and phycoerythrin concentration increased when algae were cultivated under green and blue light. Therefore, considering future management prospects for G. birdiae mariculture, we suggest that red light could be utilized as a reproductive inductor to produce tetraspores. Furthermore, if the aim is to achieve high phycoerythrin content, continuous blue light could be applied during a short photoperiod. Indeed, the combination of different wavelengths could allow better economic resource exploitation.Keywords: Gracilaria birdiae; growth; light quality; pigment content; photoacclimation; reproduction.Efectos de la calidad de luz en la reproducción, crecimiento y contenido pigmentario de Gracilaria birdiae (Rhodophyta: Gracilariales) Resumen: Las especies del género Gracilaria son la principal fuente de agar en el mundo. El desarrollo de técnicas de cultivo en laboratorio es importante para mejorar la producción, y por ello, este estudio tuvo como objetivo la evaluación de la influencia de dos estrategias de ajuste fisiológico de las algas, la fotoaclimatación y la fotomorfogénesis en G. birdiae. De modo más específico, se evaluaron los efectos de diferentes calidades espectrales de luz sobre la reproducción, crecimiento y contenido pigmentario bajo dos fotoperiodos (8 y 14 horas). Tetrasporofitos y gametofitos fueron sometidos a las siguientes calidades de luz: blanca (WH), verde (GR), rojo (RD) y azul (BL) a lo largo de nueve semanas. Al final del periodo, se analizaron los contenidos de clorofila a (Chl a), aloficocianina (APC), ficocianina (PC) y ficoeritrina (PE). Los gametofitos carecieron de estructuras reproductivas exclusivamente en radiación blanca. La diferenciación de tetrasporangios fue obtenida bajo estímulo de luz roja, pero fue ...

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“…phytochrome and a blue light photoreceptor regulating chlorophyll and biliprotein synthesis, are present in red algae such as Corallina elongata, Porphyra umbilicalis and Plocamium cartilagineum (Lopez-Figueroa & Niell, 1990). More recently in Chondrus crispus, in addition to phytochrome, a possible coaction of a green light and blue light specific photoreceptor controlling pigment synthesis has been proposed (Lopez-Figueroa, 1991). Photoreceptors for several spectral ranges may have different effects on red algae since they are able to absorb light and also to transduce the light signal.…”

Section: Introductionmentioning

confidence: 99%

Response of Audouinella saviana (Meneghini) Woelkerling (Nemaliales, Rhodophyta) cultures to monochromatic light

Talarico

Cortese²

1993

Hydrobiologia

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Audouinella saviana (Meneghini) Woelkerling was cultured at a constant temperature (24 °C) and different irradiances (from 1 mol to 30 ,mol photons m-2 s -') of blue (430-470 nm) and green (500-560 nm) light in order to study its adaptive response. Modifications in colour, morphology and ultrastructure of the thalli, together with changes in pigment composition and in the spectral properties of chlorophyll a and R-phycoerythrin, were observed both by means of light and electron microscopy (TEM, SEM) and spectrophotometric and spectrofluorimetric analyses. In this paper we report the adaptive response of the seaweed to blue and green radiation by focussing on the cell wall and on the photosynthetic apparatus, particularly on phycobilisomes in situ and on R-PE after extraction. PBSs were fully structured only under blue light at low irradiance whilst they were absent under green light, whatever the irradiance, in spite of the high R-PE content. This fact, together with the spectral changes of R-PE, suggests adaptation at a molecular level, presumably referable to changes in aggregation state.

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Red, green and blue light photoreceptors controlling chlorophylla, biliprotein and total protein synthesis in the red algaChondrus crispus

Cited by 29 publications

References 43 publications

Seasonal changes in the pigment composition of natural population of Gracilaria domingensis (Gracilariales, Rhodophyta)

Seasonal changes in the pigment composition of natural population of Gracilaria domingensis (Gracilariales, Rhodophyta)

Effects of light quality on reproduction, growth and pigment content of <em>Gracilaria birdiae</em> (Rhodophyta: Gracilariales)

Response of Audouinella saviana (Meneghini) Woelkerling (Nemaliales, Rhodophyta) cultures to monochromatic light

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