Oligosaccharide production and signaling correlate with delayed flowering in an Arabidopsis genotype grown and selected in high [CO2].

Autor: Kinmonth-Schultz H; Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, United States of America.; Departiment of Biology, Tennessee Technological University, Cookeville, TN, United States of America., Walker SM; Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, United States of America., Bingol K; Department of Energy, Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, United States of America., Hoyt DW; Department of Energy, Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, United States of America., Kim YM; Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States of America., Markillie LM; Department of Energy, Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, United States of America., Mitchell HD; Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States of America., Nicora CD; Department of Energy, Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, United States of America., Taylor R; Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States of America., Ward JK; Department of Biology, College of Arts and Sciences, Case Western Reserve University, Cleveland, OH, United States of America.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2023 Dec 28; Vol. 18 (12), pp. e0287943. Date of Electronic Publication: 2023 Dec 28 (Print Publication: 2023).
DOI: 10.1371/journal.pone.0287943
Abstrakt: Since industrialization began, atmospheric CO2 ([CO2]) has increased from 270 to 415 ppm and is projected to reach 800-1000 ppm this century. Some Arabidopsis thaliana (Arabidopsis) genotypes delayed flowering in elevated [CO2] relative to current [CO2], while others showed no change or accelerations. To predict genotype-specific flowering behaviors, we must understand the mechanisms driving flowering response to rising [CO2]. [CO2] changes alter photosynthesis and carbohydrates in plants. Plants sense carbohydrate levels, and exogenous carbohydrate application influences flowering time and flowering transcript levels. We asked how organismal changes in carbohydrates and transcription correlate with changes in flowering time under elevated [CO2]. We used a genotype (SG) of Arabidopsis that was selected for high fitness at elevated [CO2] (700 ppm). SG delays flowering under elevated [CO2] (700 ppm) relative to current [CO2] (400 ppm). We compared SG to a closely related control genotype (CG) that shows no [CO2]-induced flowering change. We compared metabolomic and transcriptomic profiles in these genotypes at current and elevated [CO2] to assess correlations with flowering in these conditions. While both genotypes altered carbohydrates in response to elevated [CO2], SG had higher levels of sucrose than CG and showed a stronger increase in glucose and fructose in elevated [CO2]. Both genotypes demonstrated transcriptional changes, with CG increasing genes related to fructose 1,6-bisphosphate breakdown, amino acid synthesis, and secondary metabolites; and SG decreasing genes related to starch and sugar metabolism, but increasing genes involved in oligosaccharide production and sugar modifications. Genes associated with flowering regulation within the photoperiod, vernalization, and meristem identity pathways were altered in these genotypes. Elevated [CO2] may alter carbohydrates to influence transcription in both genotypes and delayed flowering in SG. Changes in the oligosaccharide pool may contribute to delayed flowering in SG. This work extends the literature exploring genotypic-specific flowering responses to elevated [CO2].
Competing Interests: The authors have declared that no competing interests exist.
(Copyright: This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.)
Databáze: MEDLINE
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