Chemical interactions between kelp Macrocystis pyrifera and symbiotic bacteria under elevated CO2 condition
文献类型： 外文期刊
作者： Zhang, Xiaowen 1 ; Xi, Tianle 1 ; Wang, Yitao 1 ; Fan, Xiao 1 ; Xu, Dong 1 ; Zhang, Pengyan 1 ; Sun, Ke 1 ; Zhang, Yan 1 ; Ma, Jian 1 ; Ye, Naihao 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Natl Key Lab Mariculture Biobreeding & Sustainable, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Marine Fisheries Sci & Food Prod Proc, Qingdao 266071, Peoples R China
关键词： Kelp; Holobiont; Elevated CO2; Microbiome; Metabolome
期刊名称：MARINE LIFE SCIENCE & TECHNOLOGY （ 影响因子：5.3； 五年影响因子：5.3 ）
ISSN： 2096-6490
年卷期： 2024 年 6 卷 4 期
页码：
收录情况： SCI
摘要： Kelps are pivotal to temperate coastal ecosystems, providing essential habitat and nutrients for diverse marine life, and significantly enhancing local biodiversity. The impacts of elevated CO2 levels on kelps may induce far-reaching effects throughout the marine food web, with potential consequences for biodiversity and ecosystem functions. This study considers the kelp Macrocystis pyrifera and its symbiotic microorganisms as a holistic functional unit (holobiont) to examine their collective response to heightened CO2 levels. Over a 4 month cultivation from the fertilization of M. pyrifera gametes to the development of juvenile sporophytes, our findings reveal that elevated CO2 levels influence the structure of the M. pyrifera symbiotic microbiome, alter metabolic profiles, and reshape microbe-metabolite interactions using 16S rRNA amplicon sequencing and liquid chromatography coupled to mass spectrometry analysis. Notably, Dinoroseobacter, Sulfitobacter, Methylotenera, Hyphomonas, Milano-WF1B-44 and Methylophaga were selected as microbiome biomarkers, which showed significant increases in comparative abundance with elevated CO2 levels. Stress-response molecules including fatty-acid metabolites, oxylipins, and hormone-like compounds such as methyl jasmonate and prostaglandin F2a emerged as critical metabolomic indicators. We propose that elevated CO2 puts certain stress on the M. pyrifera holobiont, prompting the release of these stress-response molecules. Moreover, these molecules may aid the kelp's adaptation by modulating the microbial community structure, particularly influencing potential pathogenic bacteria, to cope with environmental change. These results will enrich the baseline data related to the chemical interactions between the microbiota and M. pyrifera and provide clues for predicting the resilience of kelps to future climate change.
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