Light acclimation strategies of three commercially important red algal species

Marquardt, Ronny; Schubert, Hendrik; Varela, Daniel; Huovinen, Pirjo; Henríquez, Luis A.

doi:10.1016/j.aquaculture.2009.11.004

Cited by 29 publications

(19 citation statements)

References 43 publications

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“…This increase in pigment concentration with depth is a strategy used by the algae to capture more light for photosynthesis and, consequently, to optimize its metabolic rate. Similar results have also been reported for G. lemaneiformis (Xu & Gao, 2008) and for G. chilensis (Marquardt et al, 2010).…”

Section: Discussionsupporting

confidence: 79%

Effect of depth on growth and pigment contents of the macroalgae Gracilaria bursa-pastoris

Marinho‐Soriano¹

2012

Rev. bras. farmacogn.

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Abstract:The effects of environmental parameters on biomass, growth and pigment content of the red seaweed Gracilaria bursa-pastoris (S.G. Gmel.) P.C. Silva was investigated under fi eld conditions in Thau Lagoon (France). The seaweed was cultivated in cages placed at three depths (1.0, 2.0 and 4.0 m) over a one-year period. The results showed elevated biomass and growth values in the spring and autumn, when temperature, light and photoperiod values were similar. The highest specifi c growth rates (SGR) were obtained at 1.0 m (4.95±0.29% day -1 ) and 2.0 m (4.45±0.33% day -1 ). At a depth of 4.0 m, the seaweed never exceeded 2% day -1 and obtained null values in the summer. The concentrations of phycoerythrin (RPE) and chlorophyll (CHL a) showed maximum values in the winter and minimum values in the summer. This evolution was related to water temperature, light intensity and nitrogen content in the algal tissue. The results obtained in this study show that the water depth infl uenced the growth and pigment composition of G. bursa-pastoris.

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Section: Discussionsupporting

confidence: 79%

Effect of depth on growth and pigment contents of the macroalgae Gracilaria bursa-pastoris

Marinho‐Soriano¹

2012

Rev. bras. farmacogn.

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“…4). A decline of photosynthetic pigments depending on increasing light conditions clearly indicates morphological acclimation, which has been shown for higher plants as well as for algae (Marquardt et al 2010;Lichtenthaler et al 2007;Pilon and Santamaria 2002). The decreasing of the Chl(a ?…”

Section: Discussionmentioning

confidence: 95%

Two parthenogenetic populations of Chara canescens differ in their capacity to acclimate to irradiance and salinity

et al. 2011

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The parthenogens of Chara canescens (Charophyceae) occupy broader geographical and ecological ranges than their sexual counterparts. Two possible hypotheses explain the ubiquity of parthenogens: the occurrence of one or several parthenogens with wide niches, or of many parthenogens that are restricted to narrow ecological niches. For the purposes of this study, C. canescens individuals from two neighbouring populations of the Baltic Sea (Bodstedter Bodden = BB; Salzhaff = SH), which differed significantly in water transparency and salinity, were investigated for significant differences in physiological capacity. Individuals of both habitats acclimated quickly to daily changes in irradiances in the field, but the photosynthetic efficiency of PS II showed a significant decrease with increasing daily irradiance in the habitat BB, which has lower levels of salinity and water transparency. In addition to the field study, individuals were reared under different levels of environmental factors in the laboratory: four irradiances (70-600 μmol m(-2) s(-1)) and five salinity levels (0-24 psu). The individuals of both habitats grew almost equally well at intermediate salinity levels. Growth under the artificial light supply was highest at levels corresponding to the in situ conditions for each population. Total chlorophyll was highest at intermediate salinities (BB), or hardly changed with salinity (SH). The physiological capacity for individuals from SH clearly depends upon changing growth irradiance, whereas the capacity for individuals from BB was relatively independent of salinity and irradiance. These findings indicate that both parthenogenetic C. canescens populations are locally adapted to light. However, to test adaptive potential of the parthenogens, more than two populations should be tested in future.

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“…In the latter case, it was suggested that the activity of Chl a, which accumulated under GR, increased the efficiency of light absorption. These types of response to BL and GR light could be considered as physiological acclimation in G. birdiae, similarly to Mazzaella laminarioides (Marquardt et al 2010). These authors showed that macroalgae can follow physiological versus morphological photoacclimation strategies in response to variations in both irradiance and light quality (Marquardt et al 2010).…”

Section: Discussionmentioning

confidence: 99%

“…This is a typical case of morphological photoacclimation, such as those presented by Marquardt et al (2010) for Gracilaria chilensis. However, we cannot directly associate these changes with RD because this condition also increased tetrasporangium development.…”

Section: Discussionmentioning

confidence: 99%

Effects of light quality on reproduction, growth and pigment content of <em>Gracilaria birdiae</em> (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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Light acclimation strategies of three commercially important red algal species

Cited by 29 publications

References 43 publications

Effect of depth on growth and pigment contents of the macroalgae Gracilaria bursa-pastoris

Effect of depth on growth and pigment contents of the macroalgae Gracilaria bursa-pastoris

Two parthenogenetic populations of Chara canescens differ in their capacity to acclimate to irradiance and salinity

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

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