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

Marinho‐Soriano, Eliane

doi:10.1590/s0102-695x2012005000059

Cited by 20 publications

(8 citation statements)

References 23 publications

(17 reference statements)

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“…In rhodophytes, phycobiliproteins such as phycocyanin and especially phycoerythrin, are also involved in light harvesting as accessory pigments (Gómez et al., ). The results of our study show that Chl‐ a and phycoerythrin concentrations were higher at increasing water depths, coinciding with previous observations for most macroalgae (Hanelt & Figueroa, ; Marinho‐Soriano, ). This positive correlation between photosynthetic pigments and depth may result from a compensatory strategy to increase the efficiency of light harvesting in deeper waters (Gómez et al., ; Marinho‐Soriano, ).…”

Section: Discussionsupporting

confidence: 92%

“…The results of our study show that Chl‐ a and phycoerythrin concentrations were higher at increasing water depths, coinciding with previous observations for most macroalgae (Hanelt & Figueroa, ; Marinho‐Soriano, ). This positive correlation between photosynthetic pigments and depth may result from a compensatory strategy to increase the efficiency of light harvesting in deeper waters (Gómez et al., ; Marinho‐Soriano, ). By contrast, in algae living in shallow habitats the smaller antennae size (e.g., increased Chl a : b ratio or phycobiliproteins/Chl‐ a ratio) reduces the risk of overexcitation (Hanelt & Figueroa, ; Kirk, ).…”

Section: Discussionsupporting

confidence: 92%

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Depth influence on biochemical performance and thallus size of the red alga Gelidium corneum

et al. 2018

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Recent declines in the foundation species Gelidium corneum (Hudson) J.V. Lamouroux in pristine coastal stretches of the Southeastern Bay of Biscay have been documented in which individuals showed a high bleaching incidence. Among the potential factorsthat may be responsible for these changes in G. corneum abundance, it has been suggested that high levels of irradiance may be imposing stressful environmental conditions for shallow populations. Given that light is reduced exponentially as depth increases, in this investigation we examined the influence of depth on the stress of G. corneum by comparing the performance of several biochemical parameters and thallus size in plants collected at three different depths. The results revealed that plants growing in shallow waters showed lower antioxidant activity, lower concentrations of photosynthetic pigments (Chl‐a, total carotenoids, phycoerythrin), lower internal nitrogen levels (higher C:N ratio) and shorter thallus lengths than those living in deeper waters. Some of these results may be an expression of photoacclimation, but the low antioxidant activity and total carotenoid concentration detected in plants living in shallow waters suggest that the photoprotective mechanisms of G. corneum may have failed to offset photodamage. If so, our findings support previous studies that suggest that recent changes in solar radiation are partially responsible for G. corneum declines. Nevertheless, given that the metabolic performance of macroalgae is determined by the inter‐play of irradiance with other factors, including temperature and nutrient availability, further research is needed to reach a better understanding of the factors causing stress in G. corneum.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 92%

Depth influence on biochemical performance and thallus size of the red alga Gelidium corneum

et al. 2018

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“…This will, eventually, lead to the synthesis and accumulation (or storage) of various organic proximate products. These results agreed with Marinho-Soriano (2012), who demonstrated the important role of nitrogenous nutrients in pigment biosynthesis. And also with Xu et al ( 2020) who stated the sufficiency of nitrogenous compounds for the production of chlorophyll and phycobiliproteins as protective substances.…”

Section: Seasonal Variation In the Pigment Content Of The Collected C...supporting

confidence: 92%

Morpho-anatomical, and chemical characterization of some calcareous Mediterranean red algae species

Ismail

Elshobary

2023

Bot Stud

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Climatic changes are anticipated to have a detrimental effect on calcifying marine species. Calcareous red algae may be especially vulnerable to seasonal variations since they are common and essential biologically, but there is little research on the morpho-anatomical, and chemical characterization of such species. This study conducted the seasonal investigation of the three dominant Mediterranean calcified red algae. Morphological and 18S rRNA analysis confirmed the identification of collected species as Corallina officinalis, Jania rubens, and Amphiroa rigida. In general, C. officinalis was represented in the four seasons and flourishing maximum in autumn (70% of total species individuals). While J. rubens species was represented in winter, autumn, and spring and completely absent in summer. A. rigida was abundant only in the summer season by 40%. A full morphological and anatomical description of these species were examined, and their chemical compositions (carbohydrate, protein, lipid, pigments, and elements content) were assessed in different seasons, where carbohydrates were the dominant accumulates followed by proteins and lipids. Pearson correlation analysis confirmed a positive correlation between salinity level and nitrogenous nutrients of the seawater with the pigment contents (phycobiliproteins, carotenoids, and chlorophyll a) of the studied seaweeds. The results proved that calcified red algae were able to deposit a mixture of calcium carbonates such as calcite, vaterite, calcium oxalate, calcite-III I calcium carbonate, and aragonite in variable forms depending on the species.

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“…Pereira et al (2012) found that nitrate was assimilated as PC and PE by Porphyra dioica Brodie and Irvine and phycoerythrin PE was the main form of nitrogen pool, while, phosphorus participates in the formation of biomolecules such as nucleic acids, proteins and phospholipids. In the same year, Marinho-Soriano (2012) showed the importance of NO 3 for the biosynthesis of this pigment, demonstrated the positive correlation between them.…”

Section: Discussionmentioning

confidence: 85%

Seasonal fluctuation of photosynthetic pigments of most common red seaweeds species collected from Abu Qir, Alexandria, Egypt

Ismail

Osman

2016

Rev. biol. mar. oceanogr.

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Resumen.-Se investigaron los cambios estacionales en la composición de pigmentos [Clorofila a (Cl-a), carotenoides totales (Car.), ficobiliproteínas (ficoeritrina (PE), ficocianina (PC), aloficocianina (APC))], en 5 especies de Rhodophyta. Los niveles de clorofila a, carotenoides y ficobiliproteínas presentaron altos contenidos durante invierno, y disminuyeron en verano, mostrando decoloración de tejidos de rojo a verde o amarillo. Los resultados muestran que los contenidos de pigmentos variaron estacionalmente con respecto a las especies de algas, y a los cambios de los parámetros físico-químicos, mientras que el pH, oxígeno disuelto, NO 3 -, NO 2 -, NH 4 + , nitrógeno total (TN) y fósfato total (TP) tuvieron un impacto directo sobre el contenido de pigmentos fotosintéticos, y la temperatura tuvo una correlación negativa significativa sobre los pigmentos fotosintéticos. Palabras clave: Parámetros ambientales, clorofila, ficobiliproteínas, algas rojas, variación estacionalAbstract.-Seasonal changes of pigment composition [Chlorophyll a (Chl-a), total carotenoid (Car.), phycobiliproteins (phycoerythrin (PE), phycocyanin (PC), allophycocyanin (APC))], in the 5 species of Rhodophyta were investigated. Chl-a, carotenoids and phycobiliproteins levels showed high contents during winter, whereas decreased in summer showing discoloration tissue from deep red to green or yellow. The results show that the pigment contents were varied seasonally with respect to the algal species and physical and chemical parameters changes, while pH, dissolved oxygen, NO 3 -, NO 2 -, NH 4 + , total nitrogen (TN) and total phosphorus (TP) had direct impact on photosynthetic pigments content, and temperature had significant negative correlation on photosynthetic pigments.

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

Cited by 20 publications

References 23 publications

Depth influence on biochemical performance and thallus size of the red alga Gelidium corneum

Depth influence on biochemical performance and thallus size of the red alga Gelidium corneum

Morpho-anatomical, and chemical characterization of some calcareous Mediterranean red algae species

Seasonal fluctuation of photosynthetic pigments of most common red seaweeds species collected from Abu Qir, Alexandria, Egypt

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