Acceleration of climate warming and plant dynamics in Antarctica

Cannone, Nicoletta; Malfasi, Francesco; Favero‐Longo, Sergio E.; Convey, Peter; Guglielmin, Mauro

doi:10.1016/j.cub.2022.01.074

Cited by 37 publications

(39 citation statements)

References 53 publications

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“…The Southern Ocean and Antarctic coastal seas are undergoing large-scale changes in environmental conditions as a result of warming, ozone depletion, and a positive Southern Annular Mode ( Robinson et al, 2018 ; Rogers et al, 2020 ; Cannone et al, 2022 ). In recent decades, global warming has led to a rapid warming of surface air temperatures on the Antarctic Peninsula, causing the accelerated melting of Antarctic glaciers ( Lee et al, 2017 ; Hsu et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

“…Lichens and bryophytes as well as two native Antarctic vascular plants Deschampsia antarctica and Colobanthus quitensis dominate the vegetations of Antarctica Peninsula ( Robinson et al, 2010 ). The maritime Antarctica, like the Antarctic Peninsula, has experienced extensively environmental changes and global warming, which has further led to accelerated expansion of D. antarctica and C. quitensis in 2009–2018 ( Cavieres et al, 2016 ; Cannone et al, 2022 ). The native vascular plant C. quitensis in the Antarctic Peninsula likely relies on leaf CO 2 transfer to promote leaf carbon uptake and growth in response to climate change ( Sáez et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

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Integrated transcriptome and metabolome analyses reveal the adaptation of Antarctic moss Pohlia nutans to drought stress

Fang

Zhang

et al. 2022

Front. Plant Sci.

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Most regions of the Antarctic continent are experiencing increased dryness due to global climate change. Mosses and lichens are the dominant vegetation of the ice-free areas of Antarctica. However, the molecular mechanisms of these Antarctic plants adapting to drought stress are less documented. Here, transcriptome and metabolome analyses were employed to reveal the responses of an Antarctic moss (Pohlia nutans subsp. LIU) to drought stress. We found that drought stress made the gametophytes turn yellow and curled, and enhanced the contents of malondialdehyde and proline, and the activities of antioxidant enzymes. Totally, 2,451 differentially expressed genes (DEGs) were uncovered under drought treatment. The representative DEGs are mainly involved in ROS-scavenging and detoxification, flavonoid metabolism pathway, plant hormone signaling pathway, lipids metabolism pathway, transcription factors and signal-related genes. Meanwhile, a total of 354 differentially changed metabolites (DCMs) were detected in the metabolome analysis. Flavonoids and lipids were the most abundant metabolites and they accounted for 41.53% of the significantly changed metabolites. In addition, integrated transcriptome and metabolome analyses revealed co-expression patterns of flavonoid and long-chain fatty acid biosynthesis genes and their metabolites. Finally, qPCR analysis demonstrated that the expression levels of stress-related genes were significantly increased. These genes included those involved in ABA signaling pathway (NCED3, PP2C, PYL, and SnAK2), jasmonate signaling pathway (AOC, AOS, JAZ, and OPR), flavonoid pathway (CHS, F3’,5’H, F3H, FLS, FNS, and UFGT), antioxidant and detoxifying functions (POD, GSH-Px, Prx and DTX), and transcription factors (ERF and DREB). In summary, we speculated that P. nutans were highly dependent on ABA and jasmonate signaling pathways, ROS scavenging, flavonoids and fatty acid metabolism in response to drought stress. These findings present an important knowledge for assessing the impact of coastal climate change on Antarctic basal plants.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Integrated transcriptome and metabolome analyses reveal the adaptation of Antarctic moss Pohlia nutans to drought stress

Fang

Zhang

et al. 2022

Front. Plant Sci.

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“…Similarly, a significant increase was found in biological activity over the past 50 years, measured through moss growth or accumulation rates (Amesbury et al, 2017). Currently, Antarctic plants appears to be promising models for studying the adaptation mechanism to various abiotic stresses (Convey and Peck, 2019;Perera-Castro et al, 2020;Bertini et al, 2021;Liu et al, 2021) and monitoring the regional climate changes (Amesbury et al, 2017;Lee et al, 2017;Robinson et al, 2018;Cannone et al, 2022) as well as assessing the impact of human activities (Malenovský et al, 2015;Hughes et al, 2020). Particularly, the genomic features were widely clarified in the Antarctic bacteria (Benaud et al, 2021), algae (Zhang et al, 2020b), and fishes (Kim et al, 2019), but the underpinnings remain unclear in the adaptation of mosses to extreme environments.…”

Section: Introductionmentioning

confidence: 99%

“…Global climate change and human activities are having a significant impact on the Antarctic terrestrial ecosystem (Convey and Peck, 2019;Cannone et al, 2022). The Antarctic Peninsula is now experiencing some of the most rapid warming on earth (Sato et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…The ice-free areas of Antarctica is expected to increase by approximately 25% by the end of 21st century due to climate change, while most of this expansion will occur in the Antarctic Peninsula (Lee et al, 2017). Warming had caused the special phenomena of flowering plant spread and snow algae outbreak (Gray et al, 2020;Cannone et al, 2022). Similarly, a significant increase was found in biological activity over the past 50 years, measured through moss growth or accumulation rates (Amesbury et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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The Antarctic Moss Pohlia nutans Genome Provides Insights Into the Evolution of Bryophytes and the Adaptation to Extreme Terrestrial Habitats

et al. 2022

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The Antarctic continent has extreme natural environment and fragile ecosystem. Mosses are one of the dominant floras in the Antarctic continent. However, their genomic features and adaptation processes to extreme environments remain poorly understood. Here, we assembled the high-quality genome sequence of the Antarctic moss (Pohlia nutans) with 698.20 Mb and 22 chromosomes. We found that the high proportion of repeat sequences and a recent whole-genome duplication (WGD) contribute to the large size genome of P. nutans when compared to other bryophytes. The genome of P. nutans harbors the signatures of massive segmental gene duplications and large expansions of gene families, likely facilitating neofunctionalization. Genomic characteristics that may support the Antarctic lifestyle of this moss comprise expanded gene families involved in phenylpropanoid biosynthesis, unsaturated fatty acid biosynthesis, and plant hormone signal transduction. Additional contributions include the significant expansion and upregulation of several genes encoding DNA photolyase, antioxidant enzymes, flavonoid biosynthesis enzymes, possibly reflecting diverse adaptive strategies. Notably, integrated multi-omic analyses elucidate flavonoid biosynthesis may function as the reactive oxygen species detoxification under UV-B radiation. Our studies provide insight into the unique features of the Antarctic moss genome and their molecular responses to extreme terrestrial environments.

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Electrospun Multifunctional Radiation Shielding Nanofibrous Membrane for Daily Human Protection

Chen

Wang

Liao

et al. 2023

Adv Materials Technologies

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With the widespread utilization of many radiation instruments, people are inadvertently suffering from radiation damage. But nowadays, there is still a lack of a lightweight, comfortable, and efficient wearable radiation‐proof multifunctional composite fibrous membranes in people's lives. To solve this problem, a green and efficient radiation‐resistant nanofibrous membrane consisting of cellulose fluorescent particles (CFP), ZnO‐Bi2O3 nanoparticles, and polyacrylonitrile (PAN) solution is prepared by an electrospinning technology. The microscopic characterization shows that the nanoparticles are uniformly dispersed on the surface of the nanofibrous membrane, forming a dense fibrous structure. The PAN/CFP/ZnO‐Bi2O3 nanofibrous membrane exhibits not only an excellent ultraviolet(UV) interception with an ultraviolet protection factor value of 337.99 ± 83.67, but also a strong shielding effect on low‐energy X‐rays. Simultaneously, it can not only photocatalytically degrade 88.17% of methylene blue solution within 150 min, but also remove 94.16 ± 0.96% of Escherichia coli and 99.07 ± 0.59% of Staphylococcus aureus within 3 h under dark incubation and kill all bacteria within 3 h under light. The adhesion, growth, and proliferation of bone marrow mesenchymal stem cells on the PAN/CFP/ZnO‐Bi2O3 nanofibrous membranes confirm its low cytotoxicity and good biosafety. Thus, it could be expected to be used in daily life products such as UV and X‐rays radiation protective clothing.

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Acceleration of climate warming and plant dynamics in Antarctica

Cited by 37 publications

References 53 publications

Integrated transcriptome and metabolome analyses reveal the adaptation of Antarctic moss Pohlia nutans to drought stress

Integrated transcriptome and metabolome analyses reveal the adaptation of Antarctic moss Pohlia nutans to drought stress

The Antarctic Moss Pohlia nutans Genome Provides Insights Into the Evolution of Bryophytes and the Adaptation to Extreme Terrestrial Habitats

Electrospun Multifunctional Radiation Shielding Nanofibrous Membrane for Daily Human Protection

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