Effects of periodical drying and non-drying on nutrient content and desiccation tolerance of an intertidal Pyropia yezoensis strain subject to farming conditions

Wang, Wen Jun; Li, Xiao Lei; Sun, Teng Qing; Liang, Zhiyong; Liu, Fu Li; Sun, Xiu Tao; Wang, Fei Jiu

doi:10.1007/s10811-018-1684-y

Cited by 10 publications

(6 citation statements)

References 21 publications

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“…The abbreviations were the same in Table 1. The chemical compositions of N. yezoensis and N. haitanensis were generally in accordance with the previous studies regarding the same species or the other laver species, and these laver species were all characterized by high content of protein and low content of fat [7,[12][13][14][15][16][17]22,23,30,31]. The mineral content in seaweeds is generally higher compared to that of terrestrial plants and animal products [32][33][34][35].…”

Section: Principal Component Analysis (Pca) Of Different N Yezoensis ...supporting

confidence: 84%

“…Laver is characterized by high protein contents (may be over 50% DW) [23,30] and high ratios of DAAs to TAAs [17]. Regulation of protein accumulation and AA composition is important for improving laver product quality.…”

Section: The Influence Of Din and Dip On The Contents Of Nutritional ...mentioning

confidence: 99%

“…The quality of laver, in terms of the composition of nutrients (proteins, amino acids (AAs), free amino acids (FAAs), minerals and trace elements, flavor [the ratio of delicious amino acids (DAAs) to total amino acids (TAAs)], thickness, color (pigment composition), etc., may differ among species [12], strains [13], harvesting times [7,14], culture areas [15], between the male and female parts of a blade [16], and between the periodically drying and non-drying culture systems [17]. It has been testified that the levels of dissolved inorganic nitrogen (DIN) and phosphorus (DIP) are closely related to the growth and metabolism of laver based on laboratory experiments [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Ecological Factors on the Contents of Nutritional Components and Minerals in Laver Based on Open Sea Culture System

Liang

Wang

Liu

et al. 2022

JMSE

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Laver is a popular food for its high nutritional value, which can change among culture areas and along with the progression of harvest. Neopyropia yezoensis and Neoporphyra haitanensis were cultured in succession in Taoluo and Muping, north China. The chemical composition of laver samples together with some ecological factors in the farms were investigated. From September to December, salinity increased while water temperature decreased in both areas. Dissolved inorganic nitrogen (DIN) and N:P decreased in Taoluo while increasing in Muping. Both N. yezoensis and N. haitanensis contained high levels of protein (26.90–41.38% DW) and low contents of fat (0.36–0.74% DW). High levels of minerals were detected in both species. The contents of protein, total amino acids, and total minerals in N. haitanensis increased significantly, while sugar content decreased significantly from September to December. The gray correlation analysis result implied that the typical ecological factors (DIN, dissolved inorganic phosphorus, N:P, pH, salinity, temperature, and transparency) have a great influence on accumulation of the crude nutrient, amino acid, fatty acid components, and mineral components in laver. The coefficient of variation analysis result also showed that environmental heterogeneity obviously enhanced differences in the contents of protein, amino acid, and trace elements in N. yezoensis. In addition, the principal component analysis result showed that the N. yezoensis strain ‘Huangyou No. 1’ had the highest comprehensive evaluation score in the four tested N. yezoensis strains, indicating that it has the best comprehensive quality and greatest exploitable value. We hope these findings will help to improve future laver breeding and farming.

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Section: Principal Component Analysis (Pca) Of Different N Yezoensis ...supporting

confidence: 84%

Section: The Influence Of Din and Dip On The Contents Of Nutritional ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Influence of Ecological Factors on the Contents of Nutritional Components and Minerals in Laver Based on Open Sea Culture System

Liang

Wang

Liu

et al. 2022

JMSE

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“…The tidally dictated dehydration of these seaweeds is not only a natural phenomenon but also a necessary process for the health of the algae in aquaculture. The benefits of dehydration are reflected in the fact that ultraviolet rays can reduce contaminants on thalli during dehydration, thereby reducing diseases [ 12 , 13 ]. Porphyra can be temporarily stored in cold storage with certain dryness before being returned to the sea to continue to grow [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Physiological and multi-omics responses of Neoporphyra haitanensis to dehydration-rehydration cycles

Wang

Chen

et al. 2022

BMC Plant Biol

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Background Seaweeds in the upper intertidal zone experience extreme desiccation during low tide, followed by rapid rehydration during high tide. Porphyra sensu lato are typical upper intertidal seaweeds. Therefore, it is valuable to investigate the adaptive mechanisms of seaweed in response to dehydration-rehydration stress. Results A reduction in photosynthetic capacity and cell shrinkage were observed when N. haitanensis was dehydrated, and such changes were ameliorated once rehydrated. And the rate and extent of rehydration were affected by the air flow speed, water content before rehydration, and storage temperature and time. Rapid dehydration at high air-flow speed and storage at − 20 °C with water content of 10% caused less damage to N. haitanensis and better-protected cell activity. Moreover, proteomic and metabolomic analyses revealed the abundance members of the differentially expressed proteins (DEPs) and differentially abundant metabolites (DAMs) mainly involved in antioxidant system and osmotic regulation. The ascorbic acid-glutathione coupled with polyamine antioxidant system was enhanced in the dehydration response of N. haitanensis. The increased soluble sugar content, the accumulated polyols, but hardly changed (iso)floridoside and insignificant amount of sucrose during dehydration indicated that polyols as energetically cheaper organic osmolytes might help resist desiccation. Interestingly, the recovery of DAMs and DEPs upon rehydration was fast. Conclusions Our research results revealed that rapid dehydration and storage at − 20 °C were beneficial for recovery of N. haitanensis. And the strategy to resist dehydration was strongly directed toward antioxidant activation and osmotic regulation. This work provided valuable insights into physiological changes and adaptative mechanism in desiccation, which can be applied for seaweed farming.

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“…Neopyropia yezoensis and Neoporphyra haitanensis are industrially farmed laver species in China. The culture area of laver is expanding over the past decade in China and it is still increasing, accounting for nearly 60% of all the farmed seaweeds (Wang et al, 2019;Liang et al, 2022). The relevant researches about the associations between microbial communities and laver mainly focused on the symbiotic microorganisms or pathogenic microorganisms of laver (Guan et al, 2018;Xiong et al, 2018;Yan et al, 2019;Liu et al, 2020;Wang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Insights into the spatio-temporal composition, diversity and function of bacterial communities in seawater from a typical laver farm

et al. 2022

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Laver is the most widely farmed seaweed with the largest culture area in China. The spatio-temporal variations in composition, diversity, and functional properties of bacteria in seawater as well as the environmental variables of seawater in a large-scale laver farm in China were studied. Both the community richness indices and Shannon index in the laver farming area remained at a relatively stable level during laver cultivation. Fifty-nine prokaryotic phyla were detected in all samples, however, only six of these phyla accounted for 98.84% of all sequences. Proteobacteria, Gammaproteobacteria, Rhodobacterales, Rhodobacteraceae, and Octadecabacter were the most predominant bacterial taxa at different levels of classification. The keystone bacterial taxa were Bacteroidetes, Pseudomonadales, Rhodobacterales, Flavobacteriales, Loktanella, and Pseudoruegeria based on network analysis. Members of representative bacterial biomarker taxa in November may be associated with degradation of algal cell wall polysaccharides. A significant increase in metabolic exchange and transformation nutrients occurred in the seawater during the early and late stage of laver cultivation, indicating that the laver reproductive activities (i.e. the formation/release activities of archeospores and zygotospores) probably drove the variation of metabolic functional diversity of bacterial communities. Based on Mantel test and redundancy analysis, we found the hydrographic parameters (e.g. salinity, temperature, DO, pH) as well as the key carbon (e.g. POC, DOC) and nitrogen parameters (e.g. nitrate, DIN, DON, TDN) were crucial environmental variables to shape the bacterial community composition in the surrounding seawater of laver farm. In a word, our results suggested that the microbial community structure and function significantly changed across the different succession stages during laver cultivation. This work provides new insights on the characteristics of bacterial communities in a large-scale laver farming system and solidifies the importance of laver farming in shaping seawater microbiomes.

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Effects of periodical drying and non-drying on nutrient content and desiccation tolerance of an intertidal Pyropia yezoensis strain subject to farming conditions

Cited by 10 publications

References 21 publications

The Influence of Ecological Factors on the Contents of Nutritional Components and Minerals in Laver Based on Open Sea Culture System

The Influence of Ecological Factors on the Contents of Nutritional Components and Minerals in Laver Based on Open Sea Culture System

Physiological and multi-omics responses of Neoporphyra haitanensis to dehydration-rehydration cycles

Insights into the spatio-temporal composition, diversity and function of bacterial communities in seawater from a typical laver farm

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