Seasonal Changes in the Antioxidative Defence System of a Liverwort Dumortiera hirsuta

Yadav, Sandhya; Srivastava, Akanksha; Biswas, Subhankar; Basu, Suvajit; Singh, Sushil Kumar; Mishra, Yogesh

doi:10.1007/s00344-021-10379-2

Cited by 7 publications

(7 citation statements)

References 53 publications

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“…This enzyme plays a role in the ascorbateglutathione cycle and is important for ROS detoxification. Yadav et al (2022) showed similar APOX activity (2.5 UA per mg protein) in Dumortiera hirsuta from Khasi Hills, Shillong, Meghalaya. This finding Glutathione Reductase (GR) Nordhoff et al, 1993 suggests that liverworts possess the capacity to scavenge reactive oxygen species (ROS) using APOX.…”

Section: Enzyme Activities Ascorbate Peroxidase (Apox)mentioning

confidence: 63%

Exploring the Influence of Arbuscular Mycorrhizal Symbology on the Antioxidant Potential of Liverwort Asterella multiflora: A Comprehensive Study on Rhizoid and Thallus Anatomy

Verma,

Kotwal

et al. 2024

IJERR

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Arbuscular mycorrhizal (AM) symbiosis is a vital ecological interaction between plants and fungi that enhances nutrient uptake and plant resilience. While extensively studied in vascular plants, AM symbiosis in liverworts remains relatively unexplored. Six populations of Asterella multiflora were collected throughout the year to scan for arbuscular mycorrhizal colonization and enzymatic antioxidant activity. Percent mycorrhizal colonization was measured in smooth as well as tuberculated rhizoids. Anatomical detail of the thallus was also observed. Arbuscules were observed in the cells of the storage zone of the thallus. Enzymatic antioxidant activities, i.e., superoxide dismutase (SOD), guaiacol peroxidase (GPOX), catalase (CAT), ascorbate peroxidase activity (APOX) and glutathione reductase activity (GR) were calculated. Maximum enzyme activity was observed in ascorbate peroxidase, which calculated 1.92-2.09 UA/mg protein, while catalase showed minimum activity of 0.01 UA/mg protein. A positive correlation was observed between enzyme activities and percent mycorrhizal colonization. This study delves into AM symbiosis in liverworts, focusing on Asterella multiflora and investigates the impact of AM colonization on enzymatic antioxidant activities, i.e., superoxide dismutase (SOD), guaiacol peroxidase (GPOX), catalase (CAT) ascorbate peroxidase activity (APOX) and glutathione reductase activity (GR). Antioxidants play a crucial role in stress tolerance and plant health, making them central to understanding the implications of symbiotic relationships.

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Section: Enzyme Activities Ascorbate Peroxidase (Apox)mentioning

confidence: 63%

Exploring the Influence of Arbuscular Mycorrhizal Symbology on the Antioxidant Potential of Liverwort Asterella multiflora: A Comprehensive Study on Rhizoid and Thallus Anatomy

Verma,

Kotwal

et al. 2024

IJERR

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“…Some places in Sygera Mountain show obvious daily temperature fluctuations. Such diurnal variability, potentially more impactful on liverwort ecology than previously estimated and influencing processes like evaporation and condensation on liverwort surfaces, is modulated by the region's vegetation [61,62]. Dense canopies act as buffers, mitigating extreme temperatures and providing a protective umbrella for the liverwort beneath [63].…”

Section: The Impact Of Climatic Factors On the Community Structure Of...mentioning

confidence: 96%

The Diversity and Community Pattern of Liverworts on Sygera Mountain, Tibet

Song,

Gu,

et al. 2023

Forests

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Elevation has been a cornerstone of biodiversity research, and changes in the environmental factors behind it influence biodiversity and community patterns. Exploring the potential reasons behind liverwort community patterns has been a matter of multiplied interest for ecologists. In the present study, we recorded the liverwort taxa of Sygera Mountain growing on decaying wood, trees, soil, and rocks along an elevational gradient from 3100 m to 4500 m using complex field surveys in 2017 and 2019; we investigated the effects of elevation and various climatic factors on the liverworts’ diversity and community composition. Furthermore, we used mixed effect modeling, NMDS, ANOSIM, and CCA to help us critically assess liverwort diversity with respect to environmental variables. The results of the study showed a bimodal variation in the richness of liverwort communities according to elevation, with peaks occurring at 3500 m and 4100 m, respectively. The variation in elevation was significant, with communities at 4300 m being associated with high mean diurnal range environments and those at 3100 m and 3300 m favoring areas of higher solar radiation and the precipitation of the wettest month. Among the climatic factors, the variation in the mean diurnal range was found to be the determinant of liverwort communities. The results suggest that the mean diurnal range plays a crucial role in the distribution and community structure formation of mountain liverwort. This study deepens our understanding of liverwort ecology and emphasizes the importance of climatic variables in determining liverwort community composition.

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“…Thus, the establishment of genetically tractable bryophyte models that exhibit VDT has been instrumental in understanding the significance of the genomic and molecular innovations that coincided with land plant emergence. Mosses, one of the bryophyte lineages, are excellent model systems for studying VDT (Cove et al ., 2009; Rensing et al ., 2020; Naramoto et al ., 2022; Li et al ., 2023; Yadav et al ., 2023), particularly as the molecular underpinnings of VDT may be shared across land plants (Phillips et al ., 2002; Oliver et al ., 2020). The principal bryophyte model that is widely used to study growth and development, Physcomitrium patens (Lang et al ., 2018; Rensing et al ., 2020), while drought‐tolerant (Frank et al ., 2005), is generally sensitive to dehydration stress (Mishler & Oliver, 2009; Koster et al ., 2010).…”

Section: Introductionmentioning

confidence: 99%

Syntrichia ruralis: emerging model moss genome reveals a conserved and previously unknown regulator of desiccation in flowering plants

Zhang,

Ekwealor,

Mishler

et al. 2024

New Phytologist

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Summary Water scarcity, resulting from climate change, poses a significant threat to ecosystems. Syntrichia ruralis, a dryland desiccation‐tolerant moss, provides valuable insights into survival of water‐limited conditions. We sequenced the genome of S. ruralis, conducted transcriptomic analyses, and performed comparative genomic and transcriptomic analyses with existing genomes and transcriptomes, including with the close relative S. caninervis. We took a genetic approach to characterize the role of an S. ruralis transcription factor, identified in transcriptomic analyses, in Arabidopsis thaliana. The genome was assembled into 12 chromosomes encompassing 21 169 protein‐coding genes. Comparative analysis revealed copy number and transcript abundance differences in known desiccation‐associated gene families, and highlighted genome‐level variation among species that may reflect adaptation to different habitats. A significant number of abscisic acid (ABA)‐responsive genes were found to be negatively regulated by a MYB transcription factor (MYB55) that was upstream of the S. ruralis ortholog of ABA‐insensitive 3 (ABI3). We determined that this conserved MYB transcription factor, uncharacterized in Arabidopsis, acts as a negative regulator of an ABA‐dependent stress response in Arabidopsis. The new genomic resources from this emerging model moss offer novel insights into how plants regulate their responses to water deprivation.

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Seasonal Changes in the Antioxidative Defence System of a Liverwort Dumortiera hirsuta

Cited by 7 publications

References 53 publications

Exploring the Influence of Arbuscular Mycorrhizal Symbology on the Antioxidant Potential of Liverwort Asterella multiflora: A Comprehensive Study on Rhizoid and Thallus Anatomy

Exploring the Influence of Arbuscular Mycorrhizal Symbology on the Antioxidant Potential of Liverwort Asterella multiflora: A Comprehensive Study on Rhizoid and Thallus Anatomy

The Diversity and Community Pattern of Liverworts on Sygera Mountain, Tibet

Syntrichia ruralis: emerging model moss genome reveals a conserved and previously unknown regulator of desiccation in flowering plants

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