Photosynthesis in Several Marine Plants of Japan as Affected by Salinity, Drying and pH, with Attention to their Growth Habitats

Ogata, Eizi; Matsui, Toshio

doi:10.1515/botm.1965.8.2-4.199

Cited by 77 publications

(20 citation statements)

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“…Our results suggest that H. johnsonii tolerates hypersaline conditions better than hyposaline conditions, although most seagrasses are thought to be more sensitive to increased salinity (Ogata and Matsui 1965;Biebl and McRoy 1971;Zieman 1975;Adams and Bate 1994; Doering and Chamberlain 1998;Kamermans et al 1999;van Katwijk et al 1999). Our results are consistent with Dawes et al (1989), in which the photosynthetic responses of H. johnsonii and H. decipiens to salinity and temperature variations were compared.…”

Section: Discussionsupporting

confidence: 83%

“…Despite this, significant differences in 1967;Walker 1985;Walker and McComb 1990;Kamermans et al 1999) and survival (McMillan and Moseley 1967;Pinnerup 1980;Wortmann et al 1997;van Katwijk et al 1999;Vermaat et al 2000). The cause of these effects may be due to toxicity by salt excess (Zhu 2001), elevated metabolic cost to maintain internal ionic balance (Sibly and Calow 1989), or negative alterations in the photosynthetic and respiratory rates (Ogata and Matsui 1965;Biebl and McRoy 1971;Kraemer et al 1999). Effects of salinity on photosynthetic activity were also observed in the PI curves, as reflected by differences in a, P max , and I k , which all had highest values at 40 psu.…”

Section: Discussionmentioning

confidence: 99%

“…Although most seagrasses can tolerate short-term salinity fluctuations, salinity variations will significantly affect some of the biochemical processes involved in photosynthesis and growth, determining the biomass, distribution, and productivity of these species (Montague and Ley 1993;Hillman et al 1995;Chesnes and Montague 2001). Experimental studies on seagrass tolerance to salinity changes have shown that most species have optimum productivity at around oceanic salinity (Ogata and Matsui 1965;McMillan and Moseley 1967;Biebl and McRoy 1971;Drysdale and Barbour 1975;Hillman et al 1995;Doering and Chamberlain 1998), though some species have optima at lower salinities (Kamermans et al 1999;van Katwijk et al 1999). These investigations have demonstrated that extreme or suboptimal salinities can produce negative alterations of their photosynthetic rate (Biebl and McRoy 1971;Kerr and Strother 1985;Dawes et al 1987Dawes et al , 1989, metabolism (van Katwijk et al 1999), reproduction (Ramage andSchiel 1998), growth (McMillan andMoseley 1967;Walker 1985;Walker and McComb 1990), and survival (Vermaat et al 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Along with salinity levels, other important environmental factors can vary, such as temperature or pH, also affecting the distribution and growth of several seagrass species (Ogata and Matsui 1965;Biebl and McRoy 1971;Hillman et al 1995). These variations can be natural or produced by certain human activities, such as discharges from a desalination plant.…”

Section: Introductionmentioning

confidence: 99%

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Effects of salinity and possible interactions with temperature and pH on growth and photosynthesis of Halophila johnsonii Eiseman

2005

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The effects of salinity, temperature, and pH variations on growth, survival, and photosynthetic rates of the seagrass Halophila johnsonii Eiseman were examined. Growth and survival responses to salinity were characterized by aquarium experiments in which plants were exposed to seven different salinity treatments (0, 10, 20, 30, 40, 50, and 60 psu) during 15 days. Photosynthetic behavior was assessed for short-term salinity exposures (1 or 20 h) by incubation experiments in biological oxygen demand (BOD) bottles and by measuring photosynthesis versus irradiance (PI) responses in an oxygen electrode chamber. In the bottle experiments the possible effects of interactions between salinity and temperature (15, 25, and 35°C) or pH (5, 6, 7, and 8.2) were also examined. Growth and survival of H. johnsonii were significantly affected by salinity, with maximum rates obtained at 30 psu. Salinity also altered the parameters of the PI curves. Light-saturated photosynthesis (P max ) and the photosynthetic efficiency at subsaturating light (a) increased significantly up to an optimum of 40 psu, decreasing again at the highest salinities. Dark respiration rates and compensating irradiance (I c ) showed minimum values at 40 and 50 psu, while light-saturation point (I k ) was maximum at 30-50 psu. An interaction between salinity and temperature was not found although an increase of temperature alone produced an increase in a, P max , respiration rates, and I k . An interaction between salinity and pH was only found in the P max response: P max increased with pH=5 at 30 psu. In addition, reducing the pH increased a significantly. In the BOD bottles experiment a significant reduction in the dark respiration with decreasing pH was observed, but the opposite trend was observed in the photosynthetic rate. These results suggest that the endemic seagrass H. johnsonii could be negatively affected by hypo-or hypersalinity conditions, although salinity changes did not seem to alter the tolerance of this species to other environmental factors, such as temperature or pH.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of salinity and possible interactions with temperature and pH on growth and photosynthesis of Halophila johnsonii Eiseman

2005

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“…On the other hand, high-salt growth media of Dunaliella can significantly reduce the efficacy of various antibiotics and herbicides [18]. In addition, changing the salinity and pH values of culture medium also affects the growth rate and photosynthesis activity in P. tenera and P. umbilicalis [27,28]. Similar physiological changes are considered to occur in P. yezoensis, which results in enhancing the effective influence of antibiotics to gametophytic cells.…”

Section: Resultsmentioning

confidence: 99%

Identification and Efficient Utilization of Antibiotics for the Development of a Stable Transformation System in Porphyra yezoensis (Bangiales,Rhodophyta)

Mikami¹

2014

J Aquac Res Development

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IntroductionMicroalgae and macroalgae are of great value both as organisms for basic biological research and as resources for bio-industry. That is why algae are now considered to be very promising organisms for economical and industrial applications and are the target of genetic transformation [1,2]. Recently, such transformation has been performed successfully in microalgae, and stably transformed microalgae have been employed to produce useful materials and to analyze the gene functions required for engineering these materials [3][4][5]. However, it is still hard to establish transgenic macroalgae, which is hindering our understanding of gene functions in various physiological regulations and also slowing our utilization of macroalgae in biotechnological applications.The red macroalga Porphyra yezoensis is the most popular sea crop in Asia [6] and has recently received a great deal of attention as a model macrophyte for physiological and molecular biological studies in marine red algae [7,8]. To date, several studies have described the establishment of a transient gene expression system in P. yezoensis [9]; for example, we have succeeded in eliciting the efficient expression of the codon-modified β-glucuronidase (PyGUS) and humanized cyan and green fluorescent protein (AmCFP and ZsGFP) genes by transient transformation of P. yezoensis gametophytes using particle bombardment [10][11][12][13], which was then adapted to other Bangiophycean algae [14,15]. Despite the development of transient gene expression systems in P. yezoensis, a stable transformation system, which is needed for the fine analysis of gene function, has not been established, because of a lack of techniques to select and isolate stably transformed cells from gametophytes.The availability of a useful selection protocol, which depends on the choice of a selection agent such as antibiotics and herbicides, is generally a prerequisite for the development of a stable transformation system [16]. Thus, the identification of selection agents such as antibiotics and herbicides was carried out in P. yezoensis [17], and it resulted in the indication of the non-sensitivity of P. yezoensis gametophytes to many kinds of antibiotics at concentrations up to 5 mg ml-1 in culture medium; however, the reproducibility of the test results was not examined. Therefore, we here identified a selection agent for a stable transformation system in P. yezoensis gametophytes by reexamining the sensitivity to 4 antibiotics used in the previous study, ampicillin, kanamycin, hygromycin B and geneticin [17], as well as that of chloramphenicol and paromomycin. In addition, since the high salt conditions often reduced the action of antibiotics in many marine algae [18] and high pH levels of the medium affected the toxicity of the antibiotic trimethoprim (TMP) for the willow tree Salix viminalis [19], we also investigated using an artificial synthetic medium to determine whether modification of the medium conditions in terms of pH value and salt concentration would affect the antibi...

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Investigations Concerning the Influence of Hydrostatic Pressure upon the O₂‐exchange of Marine Benthic Algae

Shameel

1973

Intl Review of Hydrobiology

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The after effects of non-ecological hydrostatic pressures were studied upon the rates of respiration and photosynthesis of certain benthic algae from the Baltic Sea. North Sea and the Mediterranean Sea . The influences of different pressure intcnsities and the different durations of pressurc were analyzed . It was observed how different parts of the sitme thallus are effected in their gas exchange by the same pressure . The interrelationships between hydrostatic pressure and the different ecofactors e . g . temperature. salinity. p H and 02-concentration of the external medium were also studied . Furthermore the seasonal variations. the behaviour of shallow and deep water a l g e~. the comparison of different ecotypes and the differences in taxonomically closely related algm wcre obscrved in regard t o their pressure resistance . Inhaltsverzeichnis

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Photosynthesis in Several Marine Plants of Japan as Affected by Salinity, Drying and pH, with Attention to their Growth Habitats

Cited by 77 publications

References 0 publications

Effects of salinity and possible interactions with temperature and pH on growth and photosynthesis of Halophila johnsonii Eiseman

Effects of salinity and possible interactions with temperature and pH on growth and photosynthesis of Halophila johnsonii Eiseman

Identification and Efficient Utilization of Antibiotics for the Development of a Stable Transformation System in Porphyra yezoensis (Bangiales,Rhodophyta)

Investigations Concerning the Influence of Hydrostatic Pressure upon the O₂‐exchange of Marine Benthic Algae

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Photosynthesis in Several Marine Plants of Japan as Affected by Salinity, Drying and pH, with Attention to their Growth Habitats

Cited by 77 publications

References 0 publications

Effects of salinity and possible interactions with temperature and pH on growth and photosynthesis of Halophila johnsonii Eiseman

Effects of salinity and possible interactions with temperature and pH on growth and photosynthesis of Halophila johnsonii Eiseman

Identification and Efficient Utilization of Antibiotics for the Development of a Stable Transformation System in Porphyra yezoensis (Bangiales,Rhodophyta)

Investigations Concerning the Influence of Hydrostatic Pressure upon the O2‐exchange of Marine Benthic Algae

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Investigations Concerning the Influence of Hydrostatic Pressure upon the O₂‐exchange of Marine Benthic Algae