Temperature Rise Increases the Bioavailability of Marine Synechococcus-Derived Dissolved Organic Matter
Synechococcus is one group of main primary producers and plays a key role in oceanic carbon fixation and transformation. To explore how the temperature rise affects the bioavailability of Synechococcus-derived dissolved organic matter (SOM) and whether this effect would be altered by the involvement...
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Frontiers Media S.A.
2022-04-01
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| Series: | Frontiers in Microbiology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmicb.2022.838707/full |
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| author | Jiajie Zhang Jiajie Zhang Jihua Liu Jihua Liu Jihua Liu Daixi Liu Daixi Liu Xiao Chen Xiao Chen Quan Shi Chen He Gang Li |
| author_facet | Jiajie Zhang Jiajie Zhang Jihua Liu Jihua Liu Jihua Liu Daixi Liu Daixi Liu Xiao Chen Xiao Chen Quan Shi Chen He Gang Li |
| author_sort | Jiajie Zhang |
| collection | DOAJ |
| description | Synechococcus is one group of main primary producers and plays a key role in oceanic carbon fixation and transformation. To explore how the temperature rise affects the bioavailability of Synechococcus-derived dissolved organic matter (SOM) and whether this effect would be altered by the involvement of heterotrophic bacteria, we compared the optical and molecular properties of the SOM of axenic Synechococcus sp. PCC7002 culture (Syn) to that with associated heterotrophic bacteria (SynB) under 15, 18, and 21°C growth temperatures at exponential and decay growth phases. Our results showed that the temperature rise increased the bioavailability of the SOM of both Syn and SynB cultures by lowering the proportion of the hydrogen-poor and double-bond structure-rich humus-like components and highly unsaturated substances, as indicated by the increase of spectral slope ratio (SR) and biological index (BIX) and decrease of humification index (HIX). Moreover, the involvement of heterotrophic bacteria modified the Synechococcus-derived SOM, together with its intracellular dissolved organic matter (DOM) excludes, lowering the SOM bioavailability. Our results indicated that the warming in climate change scenario may enhance the bioavailability of the Synechococcus-derived SOM although it may be tempered by the involvement of heterotrophic bacteria, providing an insight for preservation of the organic carbon pool in global oceans. |
| first_indexed | 2024-04-14T05:59:05Z |
| format | Article |
| id | doaj.art-a17537b02049493c8fdd430493163ca1 |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-04-14T05:59:05Z |
| publishDate | 2022-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-a17537b02049493c8fdd430493163ca12022-12-22T02:08:50ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2022-04-011310.3389/fmicb.2022.838707838707Temperature Rise Increases the Bioavailability of Marine Synechococcus-Derived Dissolved Organic MatterJiajie Zhang0Jiajie Zhang1Jihua Liu2Jihua Liu3Jihua Liu4Daixi Liu5Daixi Liu6Xiao Chen7Xiao Chen8Quan Shi9Chen He10Gang Li11Institute of Marine Science and Technology, Shandong University, Qingdao, ChinaJoint Lab for Ocean Research and Education at Dalhousie University, Shandong University and Xiamen University, Qingdao, ChinaInstitute of Marine Science and Technology, Shandong University, Qingdao, ChinaJoint Lab for Ocean Research and Education at Dalhousie University, Shandong University and Xiamen University, Qingdao, ChinaSouthern Marine Science and Engineering Guangdong Laboratory, Zhuhai, ChinaInstitute of Marine Science and Technology, Shandong University, Qingdao, ChinaJoint Lab for Ocean Research and Education at Dalhousie University, Shandong University and Xiamen University, Qingdao, ChinaInstitute of Marine Science and Technology, Shandong University, Qingdao, ChinaJoint Lab for Ocean Research and Education at Dalhousie University, Shandong University and Xiamen University, Qingdao, ChinaState Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, ChinaState Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, ChinaKey Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, ChinaSynechococcus is one group of main primary producers and plays a key role in oceanic carbon fixation and transformation. To explore how the temperature rise affects the bioavailability of Synechococcus-derived dissolved organic matter (SOM) and whether this effect would be altered by the involvement of heterotrophic bacteria, we compared the optical and molecular properties of the SOM of axenic Synechococcus sp. PCC7002 culture (Syn) to that with associated heterotrophic bacteria (SynB) under 15, 18, and 21°C growth temperatures at exponential and decay growth phases. Our results showed that the temperature rise increased the bioavailability of the SOM of both Syn and SynB cultures by lowering the proportion of the hydrogen-poor and double-bond structure-rich humus-like components and highly unsaturated substances, as indicated by the increase of spectral slope ratio (SR) and biological index (BIX) and decrease of humification index (HIX). Moreover, the involvement of heterotrophic bacteria modified the Synechococcus-derived SOM, together with its intracellular dissolved organic matter (DOM) excludes, lowering the SOM bioavailability. Our results indicated that the warming in climate change scenario may enhance the bioavailability of the Synechococcus-derived SOM although it may be tempered by the involvement of heterotrophic bacteria, providing an insight for preservation of the organic carbon pool in global oceans.https://www.frontiersin.org/articles/10.3389/fmicb.2022.838707/fulldissolved organic matter (DOM)bioavailabilitytemperature riseheterotrophic bacteriaexponential and decay phasesSynechococcus sp. PCC7002 |
| spellingShingle | Jiajie Zhang Jiajie Zhang Jihua Liu Jihua Liu Jihua Liu Daixi Liu Daixi Liu Xiao Chen Xiao Chen Quan Shi Chen He Gang Li Temperature Rise Increases the Bioavailability of Marine Synechococcus-Derived Dissolved Organic Matter Frontiers in Microbiology dissolved organic matter (DOM) bioavailability temperature rise heterotrophic bacteria exponential and decay phases Synechococcus sp. PCC7002 |
| title | Temperature Rise Increases the Bioavailability of Marine Synechococcus-Derived Dissolved Organic Matter |
| title_full | Temperature Rise Increases the Bioavailability of Marine Synechococcus-Derived Dissolved Organic Matter |
| title_fullStr | Temperature Rise Increases the Bioavailability of Marine Synechococcus-Derived Dissolved Organic Matter |
| title_full_unstemmed | Temperature Rise Increases the Bioavailability of Marine Synechococcus-Derived Dissolved Organic Matter |
| title_short | Temperature Rise Increases the Bioavailability of Marine Synechococcus-Derived Dissolved Organic Matter |
| title_sort | temperature rise increases the bioavailability of marine synechococcus derived dissolved organic matter |
| topic | dissolved organic matter (DOM) bioavailability temperature rise heterotrophic bacteria exponential and decay phases Synechococcus sp. PCC7002 |
| url | https://www.frontiersin.org/articles/10.3389/fmicb.2022.838707/full |
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