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Ma F, Chen K, Zhou C, Li X, Fan J, Yan X, Ruan R, Cheng P. Effect of phytohormone on proliferation and accumulation of cellular metabolites of microalgae Isochrysis zhanjiangensis. BIORESOURCE TECHNOLOGY 2024; 410:131299. [PMID: 39153691 DOI: 10.1016/j.biortech.2024.131299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 08/12/2024] [Accepted: 08/14/2024] [Indexed: 08/19/2024]
Abstract
Phytohormones play a role in regulating microalgae cells tolerance to adversity. This paper examines the effects of different temperatures (20 °C, 25 °C, 30 °C and 35 °C) on the physiological characteristics and endogenous phytohormones of the Isochrysis Zhanjiangensis (IZ) and its mutagenic strain (3005). The results showed that the endogenous phytohormones indole acetic acid (IAA) and jasmonic acid (JA) exhibited significant differences (P<0.05) between the two strains. The addition of 0.5 mg·L-1 exogenous JA inhibitor ibuprofen (IBU) improved cell growth of IZ, and was extremely effective in the accumulation of polysaccharides, which accounted for 33.25 %. Transcriptomic analyses revealed that genes involved in photosynthesis, such as PetC and PsbO, exhibited significantly elevated expression of the strain IZ, while the pathways related to JA synthesis may be the factor affecting microalgae temperature tolerance. This study provides a theoretical foundation for elucidating the underlying mechanisms and potential applications for high temperature tolerance in IZ.
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Affiliation(s)
- Feifei Ma
- College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang 315211, PR China
| | - Kang Chen
- College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang 315211, PR China
| | - Chengxu Zhou
- College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang 315211, PR China
| | - Xiaohui Li
- College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang 315211, PR China
| | - Jianhua Fan
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, PR China
| | - Xiaojun Yan
- School of Marine Sciences, Ningbo University, Ningbo, Zhejiang 315211, PR China
| | - Roger Ruan
- Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota-Twin Cities, Saint Paul, MN 55108, USA.
| | - Pengfei Cheng
- College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang 315211, PR China; Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota-Twin Cities, Saint Paul, MN 55108, USA.
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Zhang L, Liu J, Shen X, Li S, Li W, Xiao X. Response Surfaces Method and Artificial Intelligence Approaches for Modeling the Effects of Environmental Factors on Chlorophyll a in Isochrysis galbana. Microorganisms 2023; 11:1875. [PMID: 37630435 PMCID: PMC10458309 DOI: 10.3390/microorganisms11081875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 07/13/2023] [Accepted: 07/19/2023] [Indexed: 08/27/2023] Open
Abstract
This study reported the condition optimization for chlorophyll a (Chl a) from the microalga Isochrysis galbana. The key parameters affecting the Chl a content of I. galbana were determined by a single-factor optimization experiment. Then the individual and interaction of three factors, including salinity, pH and nitrogen concentration, was optimized by using the method of Box-Benhnken Design. The highest Chl a content (0.51 mg/L) was obtained under the optimum conditions of salinity 30‱ and nitrogen concentration of 72.1 mg/L at pH 8.0. The estimation models of Chl a content based on the response surfaces method (RSM) and three different artificial intelligence models of artificial neural network (ANN), support vector machine (SVM) and radial basis function neural network (RBFNN), were established, respectively. The fitting model was evaluated by using statistical analysis parameters. The high accuracy of prediction was achieved on the ANN, SVM and RBFNN models with correlation coefficients (R2) of 0.9113, 0.9127, and 0.9185, respectively. The performance of these artificial intelligence models depicted better prediction capability than the RSM model for anticipating all the responses. Further experimental results suggested that the proposed SVM and RBFNN model are efficient techniques for accurately fitting the Chl a content of I. galbana and will be helpful in validating future experimental work on the Chl a content by computational intelligence approach.
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Affiliation(s)
| | | | | | | | | | - Xinfeng Xiao
- College of Chemistry and Environment Engineering, Shandong University of Science & Technology, Qingdao 266510, China
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Yang Y, Hassan SH, Awasthi MK, Gajendran B, Sharma M, Ji MK, Salama ES. The recent progress on the bioactive compounds from algal biomass for human health applications. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Cao JY, Xu SM, Wang YY, Long XD, Ma SN, Zhou CX, Xu JL, Yan XJ. Integrated Analyses of miRNome and Transcriptome Reveal the Critical Role of miRNAs Toward Heat Stress Response in Isochrysis galbana. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2022; 24:753-762. [PMID: 35902415 DOI: 10.1007/s10126-022-10141-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 07/01/2022] [Indexed: 06/15/2023]
Abstract
Isochrysis galbana is widely used in aquaculture as a bait microalgal species. High temperature (HT) can severely impair the development of I. galbana, exerting adverse effects on its yield. MicroRNAs (miRNAs) play an essential role in modulating stress-responsive genes. However, the role of miRNAs in response to HT in microalgae remains largely unexplored. In the present study, we identified several conserved and novel miRNAs in I. galbana through miRNome sequencing. Among these identified miRNAs, 22 miRNAs were differentially expressed in response to heat stress, and their target genes were predicted accordingly. Moreover, a comprehensive and integrated analysis of miRNome and transcriptome was performed. We found that six potential reversely correlated differentially expressed miRNA (DEM) and differentially expressed gene (DEG) pairs were associated with heat stress response (HSR) in I. galbana. The expressions of DEMs and DEGs were further verified using real-time quantitative PCR (RT-qPCR). Integrated analyses showed that miRNAs played fundamental roles in the regulatory network of HSR in I. galbana mainly by regulating some heat-responsive genes, including heat shock proteins (HSPs), reactive oxygen species (ROS) signaling-related genes, and specific key genes in the ubiquitination pathway. Our current study identified the first set of heat-responsive miRNAs from I. galbana and helped elucidate the miRNA-mediated HSR and resistance mechanisms in I. galbana. This new knowledge could provide ways to enhance its heat stress tolerance.
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Affiliation(s)
- Jia-Yi Cao
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Si-Min Xu
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Ying-Ying Wang
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Xie-Dan Long
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Shuo-Nan Ma
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Cheng-Xu Zhou
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Ji-Lin Xu
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, 315211, Zhejiang, China.
- Fujian Dalai Seedling Technology Co. Ltd., Ningde, 352101, Fujian, China.
| | - Xiao-Jun Yan
- Collaborative Innovation Center for Zhejiang Marine High-Efficiency and Healthy Aquaculture, Ningbo University, Ningbo, 315211, Zhejiang, China.
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Chekanov K, Shibzukhova K, Lobakova E, Solovchenko A. Differential Responses to UV-A Stress Recorded in Carotenogenic Microalgae Haematococcus rubicundus, Bracteacoccus aggregatus, and Deasonia sp. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11111431. [PMID: 35684204 PMCID: PMC9183108 DOI: 10.3390/plants11111431] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/19/2022] [Accepted: 05/25/2022] [Indexed: 05/11/2023]
Abstract
UV-A is the main ultraviolet component of natural (solar) radiation. Despite it, its effect on phototrophs is studied less than UV-B. Effects of UV-A on photosynthetic apparatus of three carotenoid-producing microalgae were elucidated. Photosynthetic activity was studied using chlorophyll fluorescence analysis. Cell extracts were evaluated by absorbance spectroscopy. On the one hand, there were some common features of three strains. In all cases the changes involved PSII primary photochemistry and antennae size. All strains accumulated UV-absorbing polar compounds. On the other hand, some responses were different. Upregulation of non-photochemical quenching was observed only in B. aggregatus BM5/15, whereas in other cases its level was low. H. rubicundus BM7/13 and Deasonia sp. NAMSU 934/2 accumulated secondary carotenoids, whereas B. aggregatus BM5/15 accumulated primary ones. Microscopic features of the cultures were also different. H. rubicundus BM7/13 and Deasonia sp. NAMSU 934/2 were represented mostly by solitaire cells or small cell clusters, lacking their green color; the cells of B. aggregatus BM5/15 formed aggregates from green cells. Cell aggregation could be considered as an additional UV-protecting mechanism. Finally, the strains differed by their viability. B. aggregatus BM5/15 was most resistant to UV-A, whereas massive cell death was observed in two other cultures.
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Wan Afifudeen CL, Aziz A, Wong LL, Takahashi K, Toda T, Abd Wahid ME, Cha TS. Transcriptome-wide study in the green microalga Messastrum gracile SE-MC4 identifies prominent roles of photosynthetic integral membrane protein genes during exponential growth stage. PHYTOCHEMISTRY 2021; 192:112936. [PMID: 34509143 DOI: 10.1016/j.phytochem.2021.112936] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 08/26/2021] [Accepted: 08/29/2021] [Indexed: 06/13/2023]
Abstract
The non-model microalga Messastrum gracile SE-MC4 is a potential species for biodiesel production. However, low biomass productivity hinders it from passing the life cycle assessment for biodiesel production. Therefore, the current study was aimed at uncovering the differences in the transcriptome profiles of the microalgae at early exponential and early stationary growth phases and dissecting the roles of specific differential expressed genes (DEGs) involved in cell division during M. gracile cultivation. The transcriptome analysis revealed that the photosynthetic integral membrane protein genes such as photosynthetic antenna protein were severely down-regulated during the stationary growth phase. In addition, the signaling pathways involving transcription, glyoxylate metabolism and carbon metabolism were also down-regulated during stationary growth phase. Current findings suggested that the coordination between photosynthetic integral membrane protein genes, signaling through transcription and carbon metabolism classified as prominent strategies during exponential growth stage. These findings can be applied in genetic improvement of M. gracile for biodiesel application.
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Affiliation(s)
- C L Wan Afifudeen
- Satreps-Cosmos Laboratory, Central Laboratory Complex, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia; Institute of Marine Biotechnology, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.
| | - Ahmad Aziz
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia; Satreps-Cosmos Laboratory, Central Laboratory Complex, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.
| | - Li Lian Wong
- Satreps-Cosmos Laboratory, Central Laboratory Complex, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia; Institute of Marine Biotechnology, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.
| | - Kazutaka Takahashi
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan.
| | - Tatsuki Toda
- Faculty of Science and Engineering, Soka University, 1-236 Tangi-cho, Hachioji, Tokyo, 192-8577, Japan.
| | - Mohd Effendy Abd Wahid
- Satreps-Cosmos Laboratory, Central Laboratory Complex, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia; Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.
| | - Thye San Cha
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia; Satreps-Cosmos Laboratory, Central Laboratory Complex, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.
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Cao JY, Wang YY, Wu MN, Kong ZY, Lin JH, Ling T, Xu SM, Ma SN, Zhang L, Zhou CX, Yan XJ, Xu JL. RNA-seq Insights Into the Impact of Alteromonas macleodii on Isochrysis galbana. Front Microbiol 2021; 12:711998. [PMID: 34566917 PMCID: PMC8456094 DOI: 10.3389/fmicb.2021.711998] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 08/23/2021] [Indexed: 11/13/2022] Open
Abstract
Phycospheric bacteria may be the key biological factors affecting the growth of algae. However, the studies about interaction between Isochrysis galbana and its phycospheric bacteria are limited. Here, we show that a marine heterotrophic bacterium, Alteromonas macleodii, enhanced the growth of I. galbana, and inhibited non-photochemical quenching (NPQ) and superoxide dismutase (SOD) activities of this microalgae. Further, we explored this phenomenon via examining how the entire transcriptomes of I. galbana changed when it was co-cultured with A. macleodii. Notable increase was observed in transcripts related to photosynthesis, carbon fixation, oxidative phosphorylation, ribosomal proteins, biosynthetic enzymes, and transport processes of I. galbana in the presence of A. macleodii, suggesting the introduction of the bacterium might have introduced increased production and transport of carbon compounds and other types of biomolecules. Besides, the transcriptome changed largely corresponded to reduced stress conditions for I. galbana, as inferred from the depletion of transcripts encoding DNA repair enzymes, superoxide dismutase (SOD) and other stress-response proteins. Taken together, the presence of A. macleodii mainly enhanced photosynthesis and biosynthesis of I. galbana and protected it from stress, especially oxidative stress. Transfer of fixed organic carbon, but perhaps other types of biomolecules, between the autotroph and the heterotroph might happen in I. galbana-A. macleodii co-culture. The present work provides novel insights into the transcriptional consequences of I. galbana of mutualism with its heterotrophic bacterial partner, and mutually beneficial associations existing in I. galbana-A. macleodii might be explored to improve productivity and sustainability of aquaculture algal rearing systems.
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Affiliation(s)
- Jia-Yi Cao
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, China
| | - Ying-Ying Wang
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, China
| | - Min-Nan Wu
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, China
| | - Zhou-Yan Kong
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, China
| | - Jing-Hao Lin
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, China
| | - Ting Ling
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, China
| | - Si-Min Xu
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, China
| | - Shuo-Nan Ma
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, China
| | - Lin Zhang
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, China
| | - Cheng-Xu Zhou
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, China
| | - Xiao-Jun Yan
- Collaborative Innovation Center for Zhejiang Marine High-Efficiency and Healthy Aquaculture, Ningbo University, Ningbo, China
| | - Ji-Lin Xu
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education of China, Ningbo University, Ningbo, China
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