Photosynthetic activity of two life history stages of <i>Costaria costata</i> (Laminariales, Phaeophyceae) in response to PAR and temperature gradient

Borlongan, Iris Ann; Matsumoto, Kazuya; Nakazaki, Yoshiki; Shimada, Natsumi; Kozono, Jumpei; Nishihara, Gregory N.; Shimada, Shoichi; Watanabe, Yasumasa; Terada, Ryuta

doi:10.2216/17-70.1

Cited by 22 publications

(23 citation statements)

References 34 publications

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“…Gametophytes were isolated from spores following the procedure from Borlongan et al . (). The sporophylls were rinsed with sterile natural seawater, wiped with tissue paper, and stored overnight in the dark at 10°C.…”

Section: Methodsmentioning

confidence: 97%

“…Maximum quantum yields (maximum photochemical efficiency of photosystem II, F v /F m ; Cosgrove & Borowitzka ) of both life history stages of A. crassifolia were measured at various temperatures between 8°C and 36°C in 2°C intervals, with a red measuring light version (at 650 nm) of Maxi Imaging‐PAM (IMAG‐MAX/ LR, Heinz Walz GmbH, Effeltrich, Germany), as described in Borlongan et al . (). Randomly selected sections (approximately 2 cm long, 1 cm wide; n = 10) of sporophyte blades (from the 10 collected individuals), were placed in a stainless‐steel tray (12 × 10 × 3 cm) with sterile natural seawater.…”

Section: Methodsmentioning

confidence: 97%

“…); its southern limit of distribution in Honshu Island is perhaps due in part by seawater temperatures of over 20°C in summer, as observed in the Japanese kelp C. costata (Borlongan et al . ). Along with other kelp species, A. crassifolia grow on rocks at depths of 1–5 m (or up to 10 m), and are frequently exposed to heavy wave motion (Atobe & Saito ; Kawashima ; Yoshida ).…”

Section: Introductionmentioning

confidence: 97%

“…The lower saturation irradiance and observed chronic photoinhibition in C. costata gametophytes reflect the low‐light adaptation of the microscopic stage that is commonly found on the underside of rocks; whereas the similar temperature optima for photosynthesis of the two life stages suggest their similar temperature adaptation, relative to the stable temperature condition in the subtidal zone (Borlongan et al . ).…”

Section: Introductionmentioning

confidence: 97%

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Assessment of photosynthetic performance in the two life history stages of Alaria crassifolia (Laminariales, Phaeophyceae)

Borlongan

Nishihara

Shimada

et al. 2018

Phycological Research

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SUMMARY Understanding of the physiological responses of kelp to environmental parameters is crucial, especially in the context of environmental change that may have contributed to the decline of kelp forests all over the world. The current study presents the photosynthetic characteristics of the macroscopic sporophyte and microscopic gametophyte stages of the brown alga Alaria crassifolia from Hokkaido, Japan, as determined by examining their photosynthetic responses over a range of temperature and irradiance using dissolved oxygen and chlorophyll fluorescence measurements. Net photosynthetic rates of the sporophyte were consistently higher than those of gametophyte across temperature gradients and irradiance levels. Photosynthesis–irradiance curves at 8°C, 16°C, and 20°C revealed similar initial slopes (α = 0.4–0.9) on the two life history stages, but higher compensation (E c = 4–7 μmol photons m−2 s−1) and saturation irradiances (E k = 53–103 μmol photons m−2 s−1) for the sporophyte than for the gametophyte (E c = 0–7 μmol photons m−2 s−1; E k = 7–10 μmol photons m−2 s−1). Both stages exhibited chronic photoinhibition, as shown by the failure of recovery in their maximum quantum yields (F v/F m) following high irradiance stress, with greater possibility of photodamage at low temperature. Gametophytes were less sensitive to low temperatures than sporophytes, given their relatively stable F v/F m response. Nevertheless, temperature optima for photosynthesis of both stages coincide with each other at 20–23°C, which correspond to the growth and maturation periods of A. crassifolia in Japan. This species is also likely to suffer from thermal inhibition as both GP rates and F v/F m decreased above 24°C.

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Section: Methodsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

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Assessment of photosynthetic performance in the two life history stages of Alaria crassifolia (Laminariales, Phaeophyceae)

Borlongan

Nishihara

Shimada

et al. 2018

Phycological Research

Self Cite

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“…4a, b). This light saturation occurs at much higher light intensity compared to free-living algae, which typically saturate at much lower light fluxes in all eukaryotic algal taxa, for example, 12 μmol m −2 s −1 for red alga (Terada et al 2016); 40-240 μmol m −2 s −1 for brown algae (Borlongan et al 2018); and < 100 μmol m −2 s −1 for green algae (Falkowski and LaRoche 1991). Sequence of electron transport in relation to oxygen formation in the WOC, CO 2 assimilation and relation with O 2 consumption by dark respiration, photorespiration, and the electrode.…”

Section: Oxygen Production In Response To Co 2 Availabilitymentioning

confidence: 99%

Symbiosis extended: exchange of photosynthetic O2 and fungal-respired CO2 mutually power metabolism of lichen symbionts

2019

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Lichens are a symbiosis between a fungus and one or more photosynthetic microorganisms that enables the symbionts to thrive in places and conditions they could not compete independently. Exchanges of water and sugars between the symbionts are the established mechanisms that support lichen symbiosis. Herein, we present a new linkage between algal photosynthesis and fungal respiration in lichen Flavoparmelia caperata that extends the physiological nature of symbiotic co-dependent metabolisms, mutually boosting energy conversion rates in both symbionts. Measurements of electron transport by oximetry show that photosynthetic O 2 is consumed internally by fungal respiration. At low light intensity, very low levels of O 2 are released, while photosynthetic electron transport from water oxidation is normal as shown by intrinsic chlorophyll variable fluorescence yield (period-4 oscillations in flash-induced Fv/Fm). The rate of algal O 2 production increases following consecutive series of illumination periods, at low and with limited saturation at high light intensities, in contrast to light saturation in free-living algae. We attribute this effect to arise from the availability of more CO 2 produced by fungal respiration of photosynthetically generated sugars. We conclude that the lichen symbionts are metabolically coupled by energy conversion through exchange of terminal electron donors and acceptors used in both photosynthesis and fungal respiration. Algal sugars and O 2 are consumed by the fungal symbiont, while fungal delivered CO 2 is consumed by the alga.

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Combined effects of irradiance and temperature on the PSII photochemical efficiency in the heteromorphic life history stages of cultivated Pyropia (Bangiales): P. yezoensis f. narawaensis and P. tenera from Japan

et al. 2018

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Photosynthetic activity of two life history stages of Costaria costata (Laminariales, Phaeophyceae) in response to PAR and temperature gradient

Cited by 22 publications

References 34 publications

Assessment of photosynthetic performance in the two life history stages of Alaria crassifolia (Laminariales, Phaeophyceae)

Assessment of photosynthetic performance in the two life history stages of Alaria crassifolia (Laminariales, Phaeophyceae)

Symbiosis extended: exchange of photosynthetic O2 and fungal-respired CO2 mutually power metabolism of lichen symbionts

Combined effects of irradiance and temperature on the PSII photochemical efficiency in the heteromorphic life history stages of cultivated Pyropia (Bangiales): P. yezoensis f. narawaensis and P. tenera from Japan

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