Response to pH stress in the reef-building coral Pocillopora capitata (Anthozoa: Scleractinia)

Delgadillo-Nuño, Manuel A.; Liñán‐Cabello, Marco A.; Reyes-Gómez, Juan; Soriano-Santiago, Olinda

doi:10.4067/s0718-19572014000300004

Cited by 4 publications

(3 citation statements)

References 29 publications

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“…capitata (Delgadillo-Nuño et al, 2014;Liñán-Cabello et al, 2010a;Liñán-Cabello et al, 2010b). In vegetal tissues the accumulation of Reactive Oxygen Species (ROS) and…”

Section: Materiales Y Métodosmentioning

confidence: 99%

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2019

rbio

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Se cree que las poliaminas son restauradores del daño fisiológico inducido por el estrés en las plantas. Se podría suponer que esta función benéfica de curación también se aplica al coral, y que las poliaminas podrían ser un marcador del estado fisiológico en estos organismos. Los niveles de las poliaminas Putrescina, Espermidina y Espermina se midieron en tres sitios diferentes de arrecifes de coral de la costa del Pacífico Central Mexicano. Uno de estos sitios, Playa Mora, exhibió una marea baja que casi expuso al coral sobre el nivel del agua. Los niveles de marea y las poliaminas en las muestras se midieron durante febrero y octubre del año 2012 a 2016. Sorprendentemente, los niveles más altos de poliaminas (42.91±1.40 μg/cm 2 de Putrescina, 5.31±1.06 μg/cm 2 de Espermidina, y 12.10±0.75 μg/cm 2 de Espermina) se observaron durante octubre, una época en la que se registraron las mareas más altas y precipitación pluvial. En cambio, los niveles más bajos de poliaminas (1.35±0.16 μg/cm 2 de Putrescina, 0.15±0.03 μg/cm 2 de Espermidina, y 0.07±0.02 μg/cm 2 de Espermina) se vieron durante febrero, el mes con las mareas y precipitación más bajas. Polyamines are thought to be healers of stressinduced physiological damage in plants. It may be assumed that this healing function applies to coral as well, and that polyamines could be a marker of physiological state in these organisms. The levels of Putrescine, Spermidine and Spermine polyamines were measured in three different sites of coral reefs of the Central Mexican Pacific coasts. One of these sites, Playa Mora, exhibited a low tide which almost exposed the coral above the sea level. Tide levels and polyamines in coral samples were measured during February and October from 2012 to 2016. Surprisingly, the highest polyamines levels were measured during October, at a period when the highest tides and precipitations, were recorded with (42.91±1.40 µg/cm 2 of Putrescine, 5.31±1.06 µg/cm 2 of Spermidine and 12.10±0.75 µg/cm 2 of Article Info/Información del artículo

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“…capitata (Delgadillo-Nuño et al, 2014;Liñán-Cabello et al, 2010a;Liñán-Cabello et al, 2010b). In vegetal tissues the accumulation of Reactive Oxygen Species (ROS) and…”

Section: Materiales Y Métodosmentioning

confidence: 99%

Untitled

2019

rbio

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“…These studies are useful for geological and biological applications. Biological and sedimentological processes occurring in an artificial environment may vary from those occurring in natural environments in terms of temperature, density, carbon dioxide, turbidity, pH, sedimentation, and mechanical disturbance (Ateweberhan et al 2013;Delgadillo-Nuño et al 2014). As a result, in the research on the benthic community temporal growth, it is difficult to study the biological and sedimentological processes in the laboratory, because of the problem of sampling site alteration (Schutte et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Design and Testing of an Underwater Microscope with Variable Objective Lens for the Study of Benthic Communities

Shahani

Song

Mehdi

et al. 2021

J. Marine. Sci. Appl.

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Monitoring the ecology and physiology of corals, sediments, planktons, and microplastic at a suitable spatial resolution is of great importance in oceanic scientific research. To meet this requirement, an underwater microscope with an electrically controlled variable lens was designed and tested. The captured microscopic images of corals, sediments, planktons, and microplastic revealed their physical, biological, and morphological characteristics. Further studies of the images also revealed the growth, degradation, and bleaching patterns of corals; the presence of plankton communities; and the types of microplastics. The imaging performance is majorly influenced by the choice of lenses, camera selection, and lighting method. Image dehazing, global saturation masks, and image histograms were used to extract the image features. Fundamental experimental proof was obtained with micro-scale images of corals, sediments, planktons, and microplastic at different magnifications. The designed underwater microscope can provide relevant new insights into the observation and detection of the future conditions of aquatic ecosystems.

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“…The loss of symbiotic algae from coral host tissues, which eventually leads to indiscriminate coral bleaching, is driven by various stress factors such as an increase in temperature and irradiance level, lowered pH, and salinity changes (Goreau 1964, Glynn 1993, Hoegh-Guldberg 1999, Fitt et al 2001, Anthony et al 2008, Delgadillo-Nuño et al 2014. High temperature conditions damage various intracellular components of zooxanthellae (Brown 1997, Hoegh-Guldberg 1999, and the effects of high temperature are promoted synergistically by intense light (Weis 2008).…”

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confidence: 99%

Changes in the Ultrastructures of the Coral <i>Pocillopora damicornis</i> after Exposure to High Temperature, Ultraviolet and Far-Red Radiation

2016

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Summary Ultrastructural changes in the coral tissues and symbiotic zooxanthellae of the scleractinian coral, Pocillopora damicornis, after exposure to high temperature (HT), ultraviolet (UV) and far-red (FR) radiation were examined by transmission electron microscopy. In normal environmental conditions, the coral gastrodermis contained zero to two zooxanthellae and maintained well-defined cortical and intracellular structures. When corals were exposed to HT, UV and FR, the gastrodermal features changed remarkably depending on the duration of exposure. Treatment with HT for 15 min or exposure to UV and FR for 6 h induced the appearance of numerous, small, electron-dense granules in the gastrodermis. Autophagosomes and lysosomes in the gastrodermal cells also increased in number. The gastrodermal cells containing no zooxanthellae began to degrade and became vacuolated through the destruction and fragmentation of their cytoplasmic contents. Prolonged exposure to these stressors brought about the disintegration of the cells without zooxanthellae and led to the collapse of the gastrodermis. This resulted in the release of the other gastrodermal cells containing zooxanthellae from the gastrodermis to gastrovascular cavities. HT, UV and FR affected the gastrodermal cells without zooxanthellae more severely than the zooxanthellae themselves, although the thylakoids of the zooxanthellae were often destroyed when the coral was exposed to UV and FR. These results suggest that the coral receives the distinct stressors, HT, UV and FR, but has a common mechanism that promotes autolysis activities in the gastrodermis and discharges cells containing zooxanthellae.

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Response to pH stress in the reef-building coral Pocillopora capitata (Anthozoa: Scleractinia)

Cited by 4 publications

References 29 publications

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Untitled

Design and Testing of an Underwater Microscope with Variable Objective Lens for the Study of Benthic Communities

Changes in the Ultrastructures of the Coral <i>Pocillopora damicornis</i> after Exposure to High Temperature, Ultraviolet and Far-Red Radiation

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