China
Africa
Explore chapters and articles related to this topic
Biosynthesis and extrusion of β-chitin nanofibers by diatoms
Published in Antonio Trincone, Enzymatic Technologies for Marine Polysaccharides, 2019
Following the availability of the whole-genome sequence for Thalassiosira pseudonana (Armbrust et al. 2004), subsequent genomic analyses have revealed broad and complex roles for chitin-related processes in diatoms, which includes genes that encode for expression of multiple chitin synthases, chitinases, and proteins with chitin-binding domains. Protein domain predictions and differential gene expression patterns provide evidence that chitin synthases have multiple functions within a diatom cell. T. pseudonana possesses six genes encoding three types of chitin synthases (Durkin et al. 2009). Cyclotella cryptica also has six genes that encode for chitin synthases associated with cytosol and the ER that are unique for only the Thalassiosirales diatoms (Traller et al. 2016). In T. pseudonana, transcript abundance of the gene encoding for one of these chitin synthase types increases when cells resume division after short-term silicic acid starvation, and during short-term limitation by silicic acid (Durkin et al. 2009). A common set of 84 genes were induced by both silicon and iron limitations (Mock et al. 2008).
Microalgae for saline wastewater treatment: a critical review
Published in Critical Reviews in Environmental Science and Technology, 2020
Hoang Nhat Phong Vo, Huu Hao Ngo, Wenshan Guo, Soon Woong Chang, Dinh Duc Nguyen, Zhuo Chen, Xiaochang C. Wang, Rong Chen, Xinbo Zhang
Temperature is one of the most important determining factors for algae reproduction. In low temperature (5–10°C) and fresh water conditions, the growth of Thalassiosira pseudonana was not critical, yet in temperatures less than 5°C and brackish and marine water (>15 psu), it became proliferative (Baek, Jung, & Shin, 2011). Ding, Ma, Huang, and Chen (2013) reported that a temperature of 25°C and salinity of 25g/L were optimal for Hypnea cervicornis’s development. However, in the Baltic Sea, high temperature (above 26°C) meant that Fucus vesiculosus suffered severely. This intensified when coupled with low salinity levels (4 to 6g/L) (Takolander, Leskinen, & Cabeza, 2017). In another study, Chaetomorpha sp. could survive in temperatures of 20.1–40.9°C and salinity in the 3.4–90.0 range (Tsutsui et al., 2015). The received biomass yield was sufficiently high from 9.2 to 162kg dry weight (DW) per year, and the specific growth rate was 60% per day, independent of the seasonal conditions (Tsutsui et al., 2015).