Selection criteria for high-value biomass: seasonal and morphological variation of polyphenolic content and antioxidant capacity in two brown macroalgae

Beratto-Ramos, Angelo; Castillo-Felices, Rosario; Troncoso-Leon, Nicolás A.; Agurto-Muñoz, Andrés; Agurto-Muñoz, Cristian

doi:10.1007/s10811-018-1528-9

Cited by 16 publications

(4 citation statements)

References 59 publications

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“…Rather, antioxidant capacity remained at 50% in both high-and low-exposure fronds in the first daily cycle, whereas, in the second cycle, this was somewhat lower, at about 30%, but not significantly different from the first daily cycle. This finding contrasts with positive correlations between phenolic compounds and antioxidant activity found in many other studies (Abdala-Díaz et al, 2014;Figueroa et al, 2014;Celis-Plá et al, 2016;Gómez et al, 2016;Beratto-Ramos et al, 2019, Zúñiga et al, 2021. The low antioxidant activity in the second daily cycle was also related to a decreased ETR in situ .…”

Section: Discussioncontrasting

confidence: 90%

Solar Radiation as an Isolated Environmental Factor in an Experimental Mesocosm Approach for Studying Photosynthetic Acclimation of Macrocystis pyrifera (Ochrophyta)

et al. 2021

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Solar radiation effects on the ecophysiology and biochemical responses of the brown macroalga Macrocystis pyrifera (L.) C. Agardh were evaluated using a mesocosm approach in Southern Chile. Treatments with different radiation attenuations were simulated with three vertical attenuation coefficients: (1) total (Kd = 0.8 m−1), (2) attenuated (Kd = 1.2 m−1), and (3) low (Kd = 1.6 m−1) radiation levels. Nutrient concentration and temperature did not show differences under the three light conditions. Photosynthetic activity was estimated by in vivo chlorophyll a (Chla) fluorescence under the three light treatments as an isolated physical factor in both in situ solar radiation in the field. This was achieved using a pulse amplitude-modulated (PAM) fluorometera—Diving PAM (in situ). Photosynthetic activity and biochemical composition were measured in winter during two daily cycles (1DC and 2DC) in different parts of the thalli of the plant: (1) canopy zone, (2) middle zone, and (3) down zone, associated with different depths in the mesocosm system. Nevertheless, the in situ electron transport rate (ETRin situ) was higher in the exposed thalli of the canopy zone, independent of the light treatment conditions. The concentration of phenolic compounds (PC) increases in the down zone in the first daily cycle, and it was higher in the middle zone in the second daily cycle. The Chla increased in the morning time under total and attenuated radiation in the first daily cycle. Solar radiation increasing at midday prompted the photoinhibition of photosynthesis in the canopy zone but also an increase in productivity and phenol content. Therefore, light attenuation in the water column drove key differences in the photo-physiological responses of M. pyrifera, with the highest productivity occurring in thalli positioned in the canopy zone when exposed to solar irradiance.

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Section: Discussioncontrasting

confidence: 90%

Solar Radiation as an Isolated Environmental Factor in an Experimental Mesocosm Approach for Studying Photosynthetic Acclimation of Macrocystis pyrifera (Ochrophyta)

et al. 2021

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“…Hernández-Carmona et al, (2012) mentioned that the most abundant minerals in M. pyrifera are Mg, Ca, P, K, Cl, and I. The mineral content of M. pyrifera used in this research was generally consistent with the typical values for this seaweed from other countries (Beratto-Ramos et al, 2019;García et al, 2018;Astorga-España et al, 2017) and in Mexico (Canales, 2000;Ondarza and Ricones, 2008) Quantitative ranges for the various components in algae may vary according to season, location, and analytical methods (Castro-González et al, 1996;Khotimchenko et al, 2002).…”

Section: Macroelements In Seaweeds and Physicochemical Content Of Lsesupporting

confidence: 83%

EFFECT OF LIQUID SEAWEED EXTRACT ON POTTED GROWTH OF Eustoma grandiflorum (Raf.) Shinners)

Velasco-Ramírez

Hernández-Herrera

García-Contreras

et al. 2020

Trop Subtrop Agroecosyst

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Background. The use of liquid algae extract as a biostimulant when applied to leaves or roots, improves crop development and consequently yield, since by stimulating natural processes they benefit from the use of nutrients and increases resistance to conditions of biotic and / or abiotic stress. Objective. This investigation evaluated the response of two varieties of Eustoma grandiflorum to foliar and root application of algae extracts, grown in pots under nursery conditions. Methodology. Macroalgae extract was applied in a foliar way (20 mL spray) and directly to the substrate (50 mL), while drinking water was applied as the control. Results. The parameters obtained indicate that the foliar application has noticeably effects on var. Rosie for the variables root length, number of shoots, and number of leaves; while for var. Florida, the variables total plant length and number of shoots obtained greater significance. The method of application via substrate generates positive effects on the total length and stem length for var. Rosie, although the variables with the greatest noticeably were obtained from var. Florida for root length, number of leaves, and flower diameter. Implications. The low doses of the algae extracts, application form and the handling of cultural tasks during the growth of E. grandiflorum, contribute to a better absorption and/or efficiency of the fertilizers in the crop. Conclusion. The application of algae extracts favors the production of E. grandiflorum under nursery conditions, making their use a viable option to minimize the application of conventional fertilizers, thereby attenuating the effects on the environment.EFECTO DEL EXTRACTO LÍQUIDO DE ALGAS MARINAS EN EL CRECIMIENTO EN MACETA DE Eustoma grandiflorum (Raf.) Shinners).Antecedentes. El uso de extracto liquido de algas como bioestimulante cuando se aplican a las hojas o en las raices, mejora el desarrollo del cultivo y consecuentemente el rendimiento, ya que mediante la estimulación de procesos naturales benefician el aprovechamiento de nutrientes e incrementa la resistencia a condiciones de estrés biótico y/o abiótico. Objetivo. Esta investigación evaluó la respuesta de dos variedades de Eustoma grandiflorum a la aplicación foliar y radicular de extractos de algas, cultivadas en macetas en condiciones de vivero. Metodologia. El extracto de macroalgas se aplicó de forma foliar (20 mL) y directamente al sustrato (50 mL), mientras que el agua potable se aplicó como control. Resultados. Los parametros obtenidos indican que la aplicación foliar tiene efectos notables sobre la var. Rosie para las variables longitud de la raíz, número de brotes y número de hojas; mientras que para la var. Florida, las variables longitud total de la planta y número de brotes obtuvieron mayor importancia. El método de aplicación a través del sustrato genera efectos positivos sobre la longitud total y la longitud del tallo para las var. Rosie, aunque las variables con mayor notoriedad se obtuvieron de var. Florida para la longitud de la raíz, el número de hojas y el diámetro de la flor. Conclusión. La aplicación de extractos de algas favorece la producción de E. grandiflorum en condiciones de vivero, lo que hace que su uso sea una opción viable para minimizar la aplicación de fertilizantes convencionales, atenuando así los efectos sobre el medio ambiente.

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“…It is suspected that phlorotannin, which is a bioactive material from seaweed, is able to work more optimally in a seawater environment in accordance with its natural habitat. Beratto-Ramos et al [ 68 ] reported that the structures that have the total polyphenolic content are affected by the environment. Additional studies are needed to investigate the effect of different environments on the phlorotannin and ploroglucinol toxicity level.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Toxicity of Crude Phlorotannins and Phloroglucinol Using Different Model Organisms

Harwanto

Negara

Tirtawijaya

et al. 2022

Toxins

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Phlorotannins have been proven to contain numerous bioactive compounds that have potential to be applied in variety industries, including cosmetics, functional foods, nutraceuticals, environmental management, and medicine. The larvicidal and growth-inhibiting properties of phlorotannins have been extensively studied in various organisms. However, the toxicity of the phloroglucinol oligomer of phlorotannin is unclear, especially in Artemia salina, Daphnia magna, Lactuca sativa, and Chlorella vulgaris, which are commonly used in many bioassays. Therefore, research using these four organisms should be designed to provide basic information about the toxic effects of phlorotannins and phloroglucinol. This study aimed to evaluate the larvicidal and inhibitory properties of phlorotannins and phloroglucinol on A. salina, D. magna, L. sativa, and C. vulgaris. Phlorotannin extract and phloroglucinol were administered at various concentrations to each test organism. The survival rate of A. salina nauplii and D. magna neonates was observed every 24 h to 72 h, whereas the L. sativa seed germination and inhibition rate of C. vulgaris were observed up to 96 h. The results showed that the 24 h LC50 of phlorotannin on A. salina and D. magna were 10.67 and 1.32 mg/mL, respectively. The germination inhibition of L. sativa was 53.3% with a seed growth of less than 4 mm after 96 h upon exposure to 1 mg/mL of phlorotannin. Freshwater and seawater C. vulgaris experienced yield inhibition of 39.47 and 43.46%, respectively, when 2 mg/mL of phlorotanin was added. These results indicate that phlorotannin affects the survival and growth of the test organisms, so its use as a pesticide, herbicide, and algaecide agent for environmental and aquaculture applications can be further studied.

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Selection criteria for high-value biomass: seasonal and morphological variation of polyphenolic content and antioxidant capacity in two brown macroalgae

Cited by 16 publications

References 59 publications

Solar Radiation as an Isolated Environmental Factor in an Experimental Mesocosm Approach for Studying Photosynthetic Acclimation of Macrocystis pyrifera (Ochrophyta)

Solar Radiation as an Isolated Environmental Factor in an Experimental Mesocosm Approach for Studying Photosynthetic Acclimation of Macrocystis pyrifera (Ochrophyta)

EFFECT OF LIQUID SEAWEED EXTRACT ON POTTED GROWTH OF Eustoma grandiflorum (Raf.) Shinners)

Evaluation of Toxicity of Crude Phlorotannins and Phloroglucinol Using Different Model Organisms

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