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CO 2 Levels Modulate Carbon Utilization, Energy Levels and Inositol Polyphosphate Profile in Chlorella
Microalgae have a growing recognition of generating biomass and capturing carbon in the form of CO . The genus has especially attracted scientists' attention due to its versatility in algal mass cultivation systems and its potential in mitigating CO . However, some aspects of how these green mi...
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Published in: | Plants (Basel) 2022-12, Vol.12 (1) |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Online Access: | Get full text |
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Summary: | Microalgae have a growing recognition of generating biomass and capturing carbon in the form of CO
. The genus
has especially attracted scientists' attention due to its versatility in algal mass cultivation systems and its potential in mitigating CO
. However, some aspects of how these green microorganisms respond to increasing concentrations of CO
remain unclear. In this work, we analyzed
and
cells under low and high CO
levels. We monitored different processes related to carbon flux from photosynthetic capacity to carbon sinks. Our data indicate that high concentration of CO
favors growth and photosynthetic capacity of the two
strains. Different metabolites related to the tricarboxylic acid cycle and ATP levels also increased under high CO
concentrations in
, reaching up to two-fold compared to low CO
conditions. The signaling molecules, inositol polyphosphates, that regulate photosynthetic capacity in green microalgae were also affected by the CO
levels, showing a deep profile modification of the inositol polyphosphates that over-accumulated by up to 50% in high CO
versus low CO
conditions. InsP
and InsP
increased 3- and 0.8-fold, respectively, in
after being subjected to 5% CO
condition. These data indicate that the availability of CO
could control carbon flux from photosynthesis to carbon storage and impact cell signaling integration and energy levels in these green cells. The presented results support the importance of further investigating the connections between carbon assimilation and cell signaling by polyphosphate inositols in microalgae to optimize their biotechnological applications. |
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ISSN: | 2223-7747 2223-7747 |