Gas-Exchange in the Vesicles (Airbladders) of Ascophyllum Nodosum

Tammes, P. M. L.

doi:10.1111/j.1438-8677.1954.tb00291.x

Cited by 5 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the filaments traversing the bladder in Ascophyllum have a photosynthetic electron transport rate that could supply the bladder with sufficient O 2 to provide the pressures described here (Kang, personal communication). Thus even if Hurka is correct in his model for the filling of bladders in Sargassum, this mechanism is not consistent with experimental data for Fucaceae shown here or by other authors (e.g., Damant 1937;Tammes 1954;Aleem 1969;Dromgoole 1981).…”

Section: Discussioncontrasting

confidence: 60%

“…The regular inflation of air bladders during the light and deflation during the dark was previously shown for both Ascophyllum nodosum and Fucus vesiculosus (Damant 1937;Tammes 1954;Aleem 1969), although age-related differences were not assessed. The subtlety of the physiological response in bladders of A. nodosum shown here could not have been predicted from the apparent homogeneity of anatomy.…”

Section: Discussionmentioning

confidence: 91%

“…The air bladders develop at annual intervals following growth of the apex (Baardseth 1970;Cousens 1982). Bladders form a more or less permanent part of the frond morphology and provide a buoyancy mechanism that maintains fronds erect in the water column during high tides (Damant 1937;Fritsch 1945;Tammes 1954;Aleem 1969;Dromgoole 1990). Although Hurka (1974) suggests that bladders are an adaptation against physical damage from wave action, most authors consider bladders an adaptation for light and nutrient acquisition in stands with extremely high frond densities.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Air Pressure Regulation in Air Bladders of Ascophyllum nodosum(Fucales, Phaeophyceae)

Brackenbury¹,

Kang²,

Garbary³

2006

ALGAE

View full text Add to dashboard Cite

Diurnal and age-related changes in air pressure were measured in air bladders of Ascophyllum nodosum from the Atlantic coast of Nova Scotia. Exterior and interior bladder volumes vary significantly with 4 and 6 y bladders being about 40% larger than 2 y bladders (p < 0.01). Freshly collected bladders yielded a mean pressure of 40.8 ± 6.5 cm H 2 O. Overnight (20 h) dark treatment at 15°C generated pressure reductions by 80% in 2 y bladders but only by about 30% in 4 and 6 y bladders. Furthermore, in 2 y bladders 8 out of 11 bladders were reduced to atmospheric pressure. Pressure losses were inversely related to pressure recovery after 2.5 h in natural daylight, but after 5 h in daylight there was no significant difference in pressure within the age groups. Even under 25% of full illumination, bladders inflated to full pressure after 5 h. The results show that differences in bladder age and bladder wall thickness have roles in diurnal patterns of bladder inflation and deflation. These results confirm that bladder inflation is based on photosynthetic O 2 production and not on partial pressures of O 2 in the surrounding medium as was suggested for Sargassum. Chemical analyses of fluid recovered after the interior of bladders were washed with saline showed no evidence for the occurrence of surfactant that might be responsible for maintaining the air-liquid interface.

show abstract

Section: Discussioncontrasting

confidence: 60%

Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Air Pressure Regulation in Air Bladders of Ascophyllum nodosum(Fucales, Phaeophyceae)

Brackenbury¹,

Kang²,

Garbary³

2006

ALGAE

View full text Add to dashboard Cite

show abstract

“…Two types of intercellular gas spaces were identified on the thallus branches of the F. vesiculosus canopy we investigated: vesicles were located along the fronds at regular intervals on either side of the midrib, and receptacles were present at the apical tips. Earlier studies have documented considerable oxygen accumulation in macroalgae gas spaces under illumination (Damant ; Vallance and Coult ; Tammes ; Aleem ). Even though the gas space volume typically is small relative to that of the surrounding water, the accommodation coefficient of oxygen is ~ 40 times higher in air than in water.…”

Section: Discussionmentioning

confidence: 99%

“…We explored whether gas storage within intercellular air spaces of F. vesiculosus could be significant. Earlier studies have documented considerable oxygen accumulation within macroalgal gas spaces under illumination (Damant ; Vallance and Coult ; Tammes ; Aleem ). To investigate this potential mechanism, oxygen microsensors (fiber‐optode, 300 μ m tip diameter, T 90 < 10 s) connected to an optical oxygen meter (FireStingO 2 4‐channel, PyroScience) were inserted into gas spaces of intact F. vesiculosus plants that were collected from the study area in June, and percentage air saturation was logged within the bladders at 5 s intervals while exposing the submerged plant to light–dark cycles in temperature‐controlled (10°C) laboratory flow‐through aquaria, under ~ 100% air saturated water.…”

Section: Methodsmentioning

confidence: 99%

Seasonal metabolism and carbon export potential of a key coastal habitat: The perennial canopy‐forming macroalga Fucus vesiculosus

Attard

Rodil

Berg

et al. 2018

Limnology & Oceanography

View full text Add to dashboard Cite

The important role of macroalgal canopies in the oceanic carbon (C) cycle is increasingly being recognized, but direct assessments of community productivity remain scarce. We conducted a seasonal study on a sublittoral Baltic Sea canopy of the brown alga Fucus vesiculosus, a prominent species in temperate and Arctic waters. We investigated community production on hourly, daily, and seasonal timescales. Aquatic eddy covariance (AEC) oxygen flux measurements integrated ~ 40 m2 of the seabed surface area and documented considerable oxygen production by the canopy year‐round. High net oxygen production rates of up to 35 ± 9 mmol m−2 h−1 were measured under peak irradiance of ~ 1200 μmol photosynthetically active radiation (PAR) m−2 s−1 in summer. However, high rates > 15 mmol m−2 h−1 were also measured in late winter (March) under low light intensities < 250 μmol PAR m−2 s−1 and water temperatures of ~ 1°C. In some cases, hourly AEC fluxes documented an apparent release of oxygen by the canopy under dark conditions, which may be due to gas storage dynamics within internal air spaces of F. vesiculosus. Daily net ecosystem metabolism (NEM) was positive (net autotrophic) in all but one of the five measurement campaigns (December). A simple regression model predicted a net autotrophic canopy for two‐thirds of the year, and annual canopy NEM amounted to 25 mol O2 m−2 yr−1, approximately six‐fold higher than net phytoplankton production. Canopy C export was ~ 0.3 kg C m−2 yr−1, comparable to canopy standing biomass in summer. Macroalgal canopies thus represent regions of intensified C assimilation and export in coastal waters.

show abstract

Experimental Fluid Flow Through Plasmodesmata of Laminaria Digitata

Went¹,

Tammes²

1972

Acta Botanica Neerlandica

Self Cite

View full text Add to dashboard Cite

Electron-microscopy (EM) revealed that the conducting filaments in the medulla of the cauloid are interconnected by numerous plasmodesmata in sieve plates. The filaments contain a vesicular ground plasm with a nucleus, mitochondria, and plastids. After a cauloid had been cut through, an exudate flowed from the medulla. Afterwards longitudinal sections showed an accumulation of cytoplasm on the plates near a wound, both basal and apical. On the side facing the wound cytoplasm was absent. EM confirmed this. The authors argue that, for several reasons, a fluid flow of exudate must pass the plasmodesmata. Cytoplasm moved with the exudateand was sieved out by the plates.

show abstract

Gas-Exchange in the Vesicles (Airbladders) of Ascophyllum Nodosum

Cited by 5 publications

References 9 publications

Air Pressure Regulation in Air Bladders of Ascophyllum nodosum(Fucales, Phaeophyceae)

Air Pressure Regulation in Air Bladders of Ascophyllum nodosum(Fucales, Phaeophyceae)

Seasonal metabolism and carbon export potential of a key coastal habitat: The perennial canopy‐forming macroalga Fucus vesiculosus

Experimental Fluid Flow Through Plasmodesmata of Laminaria Digitata

Contact Info

Product

Resources

About