Next Article in Journal
The Biological Impacts of Sitagliptin on the Pancreas of a Rat Model of Type 2 Diabetes Mellitus: Drug Interactions with Metformin
Next Article in Special Issue
Optimizing the Design of Diatom Biosilica-Targeted Fusion Proteins in Biosensor Construction for Bacillus anthracis Detection
Previous Article in Journal
The Role of Beclin 1-Dependent Autophagy in Cancer

Storage Compound Accumulation in Diatoms as Response to Elevated CO2 Concentration

CNRS, BIP, UMR 7281, IMM, FR3479, 31 Chemin J. Aiguier, Aix Marseille Univ., 13 402 Marseille CEDEX 20, France
Author to whom correspondence should be addressed.
Received: 29 November 2019 / Revised: 19 December 2019 / Accepted: 21 December 2019 / Published: 24 December 2019
(This article belongs to the Special Issue The Molecular Life of Diatoms: From Genes to Ecosystems)
Accumulation of reserve compounds (i.e., lipids and chrysolaminarin) in diatoms depends on the environmental conditions, and is often triggered by stress conditions, such as nutrient limitation. Manipulation of CO2 supply can also be used to improve both lipids and carbohydrates accumulation. Given the high diversity among diatoms, we studied the two marine model diatoms—Thalassiosira pseudonana and Phaeodactylum tricornutum, a freshwater diatom, Asterionella formosa, and Navicula pelliculosa—found in fresh- and sea-water environments. We measured the accumulation of reserve compounds and the activity of enzymes involved in carbon metabolism in these diatoms grown at high and atmospheric CO2. We observed that biomass and lipid accumulation in cells grown at high CO2 differ among the diatoms. Lipid accumulation increased only in P. tricornutum and N. pelliculosa grown in seawater in response to elevated CO2. Moreover, accumulation of lipids was also accompanied by an increased activity of the enzymes tested. However, lipid accumulation and enzyme activity decreased in N. pelliculosa cultured in fresh water. Chrysolaminarin accumulation was also affected by CO2 concentration; however, there was no clear relation with lipids accumulation. Our results are relevant to understand better the ecological role of the environment in the diatom adaptation to CO2 and the mechanisms underpinning the production of storage compounds considering diatom diversity. View Full-Text
Keywords: CO2; chrysolaminarin; diatoms; triacylglycerol CO2; chrysolaminarin; diatoms; triacylglycerol
Show Figures

Figure 1

MDPI and ACS Style

Jensen, E.L.; Yangüez, K.; Carrière, F.; Gontero, B. Storage Compound Accumulation in Diatoms as Response to Elevated CO2 Concentration. Biology 2020, 9, 5.

AMA Style

Jensen EL, Yangüez K, Carrière F, Gontero B. Storage Compound Accumulation in Diatoms as Response to Elevated CO2 Concentration. Biology. 2020; 9(1):5.

Chicago/Turabian Style

Jensen, Erik L., Karen Yangüez, Frédéric Carrière, and Brigitte Gontero. 2020. "Storage Compound Accumulation in Diatoms as Response to Elevated CO2 Concentration" Biology 9, no. 1: 5.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop