Growth and reproductive responses of the conchocelis phase of Pyropia hollenbergii (Bangiales, Rhodophyta) to light and temperature

López-Vivas, Juan Manuel; Riosmena‐Rodríguez, Rafael; Llave, Antonio Alfredo Jiménez-González de la; Pacheco‐Ruiz, Isai; Yarish, Charles

doi:10.1007/s10811-014-0434-z

Cited by 16 publications

(14 citation statements)

References 21 publications

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“…The highest percentage of conchosporangia formation was detected at 40-60 μmol photons m −2 s −1 , 28°C, and 12L:12D (Fig. 1c), which differs from the findings for the Korean P. dentata strain (Kim 1999) and for other Pyropia species (Sahoo et al 2006;Li et al 2011;Lu and Yarish 2011;López-Vivas et al 2015).…”

Section: Discussioncontrasting

confidence: 88%

“…Three distinct stages are present during conchocelis development: vegetative growth, conchosporangia formation, and conchospore release, which are all affected by environmental factors (Nelson et al 1999;Wang et al 2008). For industrial seeding, it is critical to manipulate the culture conditions to control the growth and reproduction of the conchocelis stage, which is species-specific (He and Yarish 2006;Sahoo et al 2006;Li et al 2011;Lu and Yarish 2011;López-Vivas et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Developmental and physiological properties of Pyropia dentata (Bangiales, Rhodophyta) conchocelis in culture

et al. 2016

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Pyropia dentata is a promising species for aquaculture in South China. To develop an efficient protocol for seedling culture, the growth, development, and physiological changes of P. dentata conchocelis were investigated under different temperatures, irradiances, photoperiods, and salinity. After 25 days, conchosporangia formation at 28°C was 5-7-fold of that at 25 and 31°C. The percentage of conchosporangia increased as day length increased from 8 to 12 h and then decreased sharply under day length ≥14 h, with no conchosporangia observed under 24L:0D. By contrast, long day length (≥14 h) and lower temperature (≤25°C) favored the vegetative growth of conchocelis. Conchosporangia formation peaked at 28°C, 12L:12D, and 40-60 μmol photons m −2 s −1 . The highest F v /F m , P n , and P n / R d also occurred at 28°C and/or 12L:12D, which might provide energy for conchosporangia formation. Total soluble proteins (TSPs) content decreased while relative growth rate increased as irradiance and day length increased. Increasing irradiance and day length, and at temperatures of 31°C caused a reduction in phycoerythrin and chlorophyll a content. However, allophycocyanin content increased at 31°C and the content of phycocyanin, carotenoids, and TSPs remained steady from 25 to 31°C. Growth, development, P n , content of TSPs and pigments were similar at 25-40 ppt. F v /F m decreased and R d increased significantly at salinities ≥35 ppt. These findings provide informative data on the mechanisms of Pyropia conchocelis development, and help establish an efficient seedling culture protocol for this P. dentata strain.

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Section: Discussioncontrasting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Developmental and physiological properties of Pyropia dentata (Bangiales, Rhodophyta) conchocelis in culture

et al. 2016

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“…One adaptation of marine macrophytes to ensure survival in these highly dynamic and extreme habitats is a complex life cycle, with alterations in preferred conditions depending on the life history stage (Lubchenco and Cubit 1980;Cunningham et al 1993). Changing environmental conditions can be important triggers in life history events such as initiating reproduction (Liu et al 2017) and especially temperature and photoperiod have been found to be important factors in the life history of bladed Bangiales (Pereira et al 2004;Lindstrom et al 2008;López-Vivas et al 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Different photoperiod treatments could only be controlled in the constant temperature rooms (15 and 18°C) due to spatial constraints. Light intensities differed slightly between different set ups but were equal within experiments and are not considered to impact the results (Orfanidis 2001;Pereira et al 2004;Green and Neefus 2015;López-Vivas et al 2015).…”

Section: Methodsmentioning

confidence: 99%

Cultivation of early life history stages of Porphyra dioica from the British Isles

2019

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Bladed Bangiales of the genus Porphyra/Pyropia are highly valuable red algae and extensively farmed in South East Asia. Interest is rising in cultivating species local to the North East Atlantic but the control of the heteromorphic life cycle of native species remains difficult as previous studies reported high inter-and intraspecific variability in required cultivation conditions. Here, working with Porphyra dioica from a UK source population, we conducted a series of experiments investigating the influence of substrate, temperature, photoperiod and light intensity on the development of early life history stages (conchocelis (filamentous sporophyte) and young thalli (gametophyte)). Special focus was the influence of temperature and photoperiod on mature conchocelis to induce a conchospore mass release-the current bottleneck of European Porphyra cultivation. Sporophytes grew largest on an oyster shell substrate and under long day conditions at 18°C. A decrease in temperature from 18 to 9°C initiated a mass conchospore release (498 ± 146 spores mL −1) from a P. dioica conchocelis culture grown in suspension. Released conchospores germinated into small thalli on nylon ropes, with best growth (7.2 ± 0.9% day −1) at low temperatures of 9°C. Conchospore germination increased with decreasing light intensity but germination success was generally very low (< 5%), indicating the cultivation protocol needs further improvement. Our results reflect the adaptation of P. diocia to seasonal environmental conditions in temperate regions and the importance of these conditions for the successful cultivation. We are the first to describe a mass conchospore release for P. diocia growing in suspension which has important implications for commercial production.

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“…Interesante son las variaciones estacionales y distribución de las especies pertenecientes a los géneros Porphyra y Pyropia, lo cual demuestra la existencia de adaptaciones particulares a la vida en el intermareal para un adecuado desarrollo de cada una de ellas. Esta información representa un insumo valioso para explorar métodos de propagación y cultivo para esas nuevas entidades genéticas, en donde el control abiótico de la reproducción y crecimiento, mediado por factores ambientales como temperatura, luz y fotoperiodo, ha sido fundamental en la domesticación de especies de Bangiales foliosas, en diferentes regiones del planeta (Katz et al 2000, López-Vivas et al 2015.…”

Section: Discussionunclassified

Variación espacio-temporal en la composición del ensamble de macroalgas del intermareal rocoso de Maitencillo, Valparaíso, costa central de Chile

Betancourtt

Zapata

Latorre

et al. 2019

Rev. biol. mar. oceanogr.

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Growth and reproductive responses of the conchocelis phase of Pyropia hollenbergii (Bangiales, Rhodophyta) to light and temperature

Cited by 16 publications

References 21 publications

Developmental and physiological properties of Pyropia dentata (Bangiales, Rhodophyta) conchocelis in culture

Developmental and physiological properties of Pyropia dentata (Bangiales, Rhodophyta) conchocelis in culture

Cultivation of early life history stages of Porphyra dioica from the British Isles

Variación espacio-temporal en la composición del ensamble de macroalgas del intermareal rocoso de Maitencillo, Valparaíso, costa central de Chile

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