Carbohydrases of the digestive gland and the crystalline style of the atlantic deep-sea scallop (Placopecten magellanicus, gmelin)

Digestion of lipids and carbohydrates from microalgae (Chaetoceros muelleri Lemmermann and Isochrysis aff. galbana clone T-ISO) in juvenile scallops (Pecten maximus L.)

“…Differences in enzymatic activity in the digestive organs of P. maximus reflect the main sites of digestion for the respective nutrients. The high laminaranase activity in the crystalline style and gastric gland is in agreement with similar findings in P. magellanicus (Wojtowicz 1972). The stomach and crystalline style are the principal sites of extracellular digestion, while the digestive gland is the major site of intracellular digestion (Beninger & Le Pennec 1991).…”

“…The pH value of the McIlvain‐buffer, used in the laminaranase (β‐1,3‐glucanase) activity assay, was 6.7 corresponding to the pH value of the hepatopancreas of 40–50‐mm scallops (unpublished data). The laminaranase activity is shown to be high in the crystalline style and gastric gland (Wojtowicz 1972). The pH value of the potassium phosphate buffer, used in the neutral lipase activity assay, was 7.0, corresponding to the pH value of the intestine of 40–50‐mm scallops (unpublished data).…”

Digestion of lipids and carbohydrates from microalgae (Chaetoceros muelleri Lemmermann and Isochrysis aff. galbana clone T-ISO) in juvenile scallops (Pecten maximus L.)

“…Differences in enzymatic activity in the digestive organs of P. maximus reflect the main sites of digestion for the respective nutrients. The high laminaranase activity in the crystalline style and gastric gland is in agreement with similar findings in P. magellanicus (Wojtowicz 1972). The stomach and crystalline style are the principal sites of extracellular digestion, while the digestive gland is the major site of intracellular digestion (Beninger & Le Pennec 1991).…”

“…The pH value of the McIlvain‐buffer, used in the laminaranase (β‐1,3‐glucanase) activity assay, was 6.7 corresponding to the pH value of the hepatopancreas of 40–50‐mm scallops (unpublished data). The laminaranase activity is shown to be high in the crystalline style and gastric gland (Wojtowicz 1972). The pH value of the potassium phosphate buffer, used in the neutral lipase activity assay, was 7.0, corresponding to the pH value of the intestine of 40–50‐mm scallops (unpublished data).…”

Physiological energetics of the thick shell mussel Mytilus coruscus exposed to seawater acidification and thermal stress

“…However, juvenile M. galloprovincialis showed a significant increment in AE caused by seawater acidification (Fernández-Reiriz et al, 2012). This pattern may be related to the optimization of certain digestive enzymes (amylase, glucosidase and peptidase) under conditions of reduced pH (Wojtowicz, 1972;Areekijseree et al, 2004), which could facilitate nutrient absorption. Thus, based on the existed data, the AE responses of bivalves under different pH conditions are species-specific.…”

Biodegradation of polypropylene by filter-feeding marine scallop Mizuhopecten yessoensis: infrared spectroscopy evidence

“…were found as part of these digestive enzymes (Fernańdez-Reiriz et al, 2001;Milke et al, 2012;Lyu et al, 2016;Trestrail et al, 2021;Gonzaĺez et al, 2022). It should be noted, however, that crystalline styles are characterized by a higher activity of carbohydrases (cellulase, laminarinase and amylase) compared with the digestive gland (Wojtowicz, 1972;Fernańdez-Reiriz et al, 2001). Based on the results obtained, an assumption can be made these features of the crystalline styles result in the stronger degradation of PP fragments compared with the digestive gland (Table 1).…”

Digestion of lipids and carbohydrates from microalgae (Chaetoceros muelleri Lemmermann and Isochrysis aff. galbana clone T-ISO) in juvenile scallops (Pecten maximus L.)

“…Differences in enzymatic activity in the digestive organs of P. maximus reflect the main sites of digestion for the respective nutrients. The high laminaranase activity in the crystalline style and gastric gland is in agreement with similar findings in P. magellanicus (Wojtowicz 1972). The stomach and crystalline style are the principal sites of extracellular digestion, while the digestive gland is the major site of intracellular digestion (Beninger & Le Pennec 1991).…”

“…The pH value of the McIlvain‐buffer, used in the laminaranase (β‐1,3‐glucanase) activity assay, was 6.7 corresponding to the pH value of the hepatopancreas of 40–50‐mm scallops (unpublished data). The laminaranase activity is shown to be high in the crystalline style and gastric gland (Wojtowicz 1972). The pH value of the potassium phosphate buffer, used in the neutral lipase activity assay, was 7.0, corresponding to the pH value of the intestine of 40–50‐mm scallops (unpublished data).…”

Physiological energetics of the thick shell mussel Mytilus coruscus exposed to seawater acidification and thermal stress

“…However, juvenile M. galloprovincialis showed a significant increment in AE caused by seawater acidification (Fernández-Reiriz et al, 2012). This pattern may be related to the optimization of certain digestive enzymes (amylase, glucosidase and peptidase) under conditions of reduced pH (Wojtowicz, 1972;Areekijseree et al, 2004), which could facilitate nutrient absorption. Thus, based on the existed data, the AE responses of bivalves under different pH conditions are species-specific.…”

Biodegradation of polypropylene by filter-feeding marine scallop Mizuhopecten yessoensis: infrared spectroscopy evidence

“…were found as part of these digestive enzymes (Fernańdez-Reiriz et al, 2001;Milke et al, 2012;Lyu et al, 2016;Trestrail et al, 2021;Gonzaĺez et al, 2022). It should be noted, however, that crystalline styles are characterized by a higher activity of carbohydrases (cellulase, laminarinase and amylase) compared with the digestive gland (Wojtowicz, 1972;Fernańdez-Reiriz et al, 2001). Based on the results obtained, an assumption can be made these features of the crystalline styles result in the stronger degradation of PP fragments compared with the digestive gland (Table 1).…”

Digestion of lipids and carbohydrates from microalgae (Chaetoceros muelleri Lemmermann and Isochrysis aff. galbana clone T-ISO) in juvenile scallops (Pecten maximus L.)

“…Differences in enzymatic activity in the digestive organs of P. maximus reflect the main sites of digestion for the respective nutrients. The high laminaranase activity in the crystalline style and gastric gland is in agreement with similar findings in P. magellanicus (Wojtowicz 1972). The stomach and crystalline style are the principal sites of extracellular digestion, while the digestive gland is the major site of intracellular digestion (Beninger & Le Pennec 1991).…”

“…The pH value of the McIlvain‐buffer, used in the laminaranase (β‐1,3‐glucanase) activity assay, was 6.7 corresponding to the pH value of the hepatopancreas of 40–50‐mm scallops (unpublished data). The laminaranase activity is shown to be high in the crystalline style and gastric gland (Wojtowicz 1972). The pH value of the potassium phosphate buffer, used in the neutral lipase activity assay, was 7.0, corresponding to the pH value of the intestine of 40–50‐mm scallops (unpublished data).…”

Physiological energetics of the thick shell mussel Mytilus coruscus exposed to seawater acidification and thermal stress

“…However, juvenile M. galloprovincialis showed a significant increment in AE caused by seawater acidification (Fernández-Reiriz et al, 2012). This pattern may be related to the optimization of certain digestive enzymes (amylase, glucosidase and peptidase) under conditions of reduced pH (Wojtowicz, 1972;Areekijseree et al, 2004), which could facilitate nutrient absorption. Thus, based on the existed data, the AE responses of bivalves under different pH conditions are species-specific.…”

Biodegradation of polypropylene by filter-feeding marine scallop Mizuhopecten yessoensis: infrared spectroscopy evidence

“…were found as part of these digestive enzymes (Fernańdez-Reiriz et al, 2001;Milke et al, 2012;Lyu et al, 2016;Trestrail et al, 2021;Gonzaĺez et al, 2022). It should be noted, however, that crystalline styles are characterized by a higher activity of carbohydrases (cellulase, laminarinase and amylase) compared with the digestive gland (Wojtowicz, 1972;Fernańdez-Reiriz et al, 2001). Based on the results obtained, an assumption can be made these features of the crystalline styles result in the stronger degradation of PP fragments compared with the digestive gland (Table 1).…”