Extracellular and intracellular phenol production by microalgae during photoautotrophic batch cultivation

Caprio, Fabrizio Di; Pipitone, Luca Maria; Altimari, Pietro; Pagnanelli, Francesca

doi:10.1016/j.nbt.2020.12.003

Cited by 5 publications

(4 citation statements)

References 44 publications

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“…T. obliquus was produced from cultivation under optimal environmental conditions, for inducing high growth rate, high photosynthetic yield and high content of pigments and phenols [ 73 ]. Biomass harvesting was done in correspondence of the point at which nitrogen was depleted from the culture medium, which corresponds with the maximum productivity for antioxidants as phenols and pigments [ 35 , 76 ]. The biochemical composition shows a predominant content of proteins (54 ± 3%), typical for cells grown up in nutrient replete conditions.…”

Section: Resultsmentioning

confidence: 99%

“…The difference between the percent content of starch and total carbohydrates is mainly due to cell wall polysaccharides made of hemicelluloses and cellulose. Phenols were not measured in this study, but it is known that this strain in these conditions contains about 10 mg/g phenolic compounds [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

“…An additional novelty of the work is the use of dried Tetradesmus obliquus microalgae (also known as Scenedesmus obliquus) as film bioactive filler. Indeed, Tetradesmus obliquus microalgae is known to possesses chlorophylls, carotenoids (lutein, β-carotene) [ 34 ] and phenols as antioxidant components [ 35 ]. T. obliquus was chosen for this study because it is a renewable source that can be easily produced at larger industrial scale to replace fossil derived chemicals with bio-based compounds.…”

Section: Introductionmentioning

confidence: 99%

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Sustainable Bioactive Packaging Based on Thermoplastic Starch and Microalgae

Tedeschi

Caprio

Piozzi

et al. 2021

IJMS

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This study combines the use of corn starch and Tetradesmus obliquus microalgae for the production of antioxidant starch films as flexible packaging material. Starch was plasticized with glycerol and blended with 1 w% polyallylamine chosen as an agent to modify the film physical properties. The addition of polyallylamine improved film water stability and water vapor transmission rate as well as mechanical stiffness and tenacity. The dried Tetradesmus obliquus microalgae, which showed an EC50 value of 2.8 mg/mg DPPH (2.2-Diphenyl-1-picrylhydrazyl radical), was then used as antioxidant filler. The addition of microalgae provided the films with good antioxidant activity, which increased with microalgae content increasing. To our knowledge, this is the first study reporting the development of sustainable bioactive packaging films composed of almost 100% starch, and follows the European union’s goals on plastics strategy concerning the promotion of bio-based, compostable plastics and the setting up of approaches to prevent food waste with a simple plastic packaging.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sustainable Bioactive Packaging Based on Thermoplastic Starch and Microalgae

Tedeschi

Caprio

Piozzi

et al. 2021

IJMS

Self Cite

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“…Phenolics have been associated with antioxidant protective effects in Spirulina maxima , Tetradesmus obliquus , and Chlorella ssp. [ 35 , 36 ]. Those data are similar to the amount of TPC obtained in this work since the values fall within this range as shown in Figure 2 .…”

Section: Discussionmentioning

confidence: 99%

Metabolic Responses of the Microalga Neochloris oleoabundans to Extracellular Self- and Nonself-DNA

Zárate-López,

Quintana-Rodríguez,

Orona-Tamayo

et al. 2023

IJMS

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Stressed organisms identify intracellular molecules released from damaged cells due to trauma or pathogen infection as components of the innate immune response. These molecules called DAMPs (Damage-Associated Molecular Patterns) are extracellular ATP, sugars, and extracellular DNA, among others. Animals and plants can recognize their own DNA applied externally (self-exDNA) as a DAMP with a high degree of specificity. However, little is known about the microalgae responses to damage when exposed to DAMPs and specifically to self-exDNAs. Here we compared the response of the oilseed microalgae Neochloris oleoabundans to self-exDNA, with the stress responses elicited by nonself-exDNA, methyl jasmonate (MeJA) and sodium bicarbonate (NaHCO3). We analyzed the peroxidase enzyme activity related to the production of reactive oxygen species (ROS), as well as the production of polyphenols, lipids, triacylglycerols, and phytohormones. After 5 min of addition, self-exDNA induced peroxidase enzyme activity higher than the other elicitors. Polyphenols and lipids were increased by self-exDNA at 48 and 24 h, respectively. Triacylglycerols were increased with all elicitors from addition and up to 48 h, except with nonself-exDNA. Regarding phytohormones, self-exDNA and MeJA increased gibberellic acid, isopentenyladenine, and benzylaminopurine at 24 h. Results show that Neochloris oleoabundans have self-exDNA specific responses.

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