A new species of Tetradesmus (Chlorophyceae, Chlorophyta) isolated from desert soil crust habitats in southwestern North America

Terlova, Elizaveta F.; Lewis, Louise A.

doi:10.2478/pfs-2019-0004

Cited by 14 publications

(18 citation statements)

References 13 publications

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“…Phylogenetic analyses conducted using BI and ML resulted in identical tree topologies ( Fig. 1), which agrees with previously published phylogenies ofTetradesmus (Fletchner et al 1998;Lewis & Flechtner 2005;Terlova & Lewis 2019). Species isolated from desert soil crusts do not form a single clade, and instead are dispersed across the tree, with at least one desert species having a strongly supported sister relationship to an aquatic species (Fig.…”

Section: Phylogenetic Analysissupporting

confidence: 87%

“…Of the 25 known species in the green algal genus Tetradesmus,five were described from terrestrial habitats (Lewis & Flechtner 2005, Mikhailyuk et al 2019, Terlova & Lewis 2019. Strain UTEX 72 was confirmed as a strain of T. obliquus in the present study.As shown in our study ( Fig.…”

Section: Phylogenetic Relationships Of Aquatic and Terrestrialtetradesupporting

confidence: 64%

“…Strain UTEX 72 was confirmed as a strain of T. obliquus in the present study.As shown in our study ( Fig. 1) and in Terlova & Lewis (2019), not all terrestrial taxa are reconstructed as closest sister taxa, with aquaticT. "raciborskii " sharing a common ancestor with terrestrialT.…”

Section: Phylogenetic Relationships Of Aquatic and Terrestrialtetradementioning

confidence: 50%

“…For example, Tetradesmus G.M. Smith (Sphaeropleales, Chlorophyceae, Chlorophyta), a common planktonic freshwater genus of unicellular or colonial green algae, contains several terrestrial species that are closely related to the aquatic species (Lewis & Flechtner 2005;Mikhailyuk et al 2019;Terlova & Lewis 2019).…”

Section: Introductionmentioning

confidence: 99%

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Desert green algae show higher desiccation tolerance than their aquatic sister-species

Terlova¹,

Holzinger²,

Lewis³

2020

Preprint

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Diverse algae possess vegetative desiccation tolerance, the ability to recover from extreme desiccation without forming specialized resting structures. Green algal genera such as Tetradesmus (Sphaeropleales, Chlorophyceae) contain both terrestrial and aquatic species, providing an opportunity to compare physiological traits associated with the transition to land in closely related taxa. We subjected six species from aquatic and terrestrial habitats to three desiccation treatments varying in final relative humidity followed by short-and mid-term rehydration. We tested the capacity of the algae to recover from desiccation using the effective quantum yield of photosystem II as a proxy for physiological activity. The degree of recovery was dependent both on the habitat of origin and the desiccation scenario, with terrestrial, but not aquatic species, recovering from desiccation. Distinct strains of each species responded similarly to desiccation and rehydration, with the exception of one aquatic strain that recovered from the mildest desiccation. Cell ultrastructure was uniformly maintained in both aquatic and desert species during dehydration and rehydration, but staining with an amphiphilic styryl dye indicated desiccation-induced damage to the plasma membrane in the aquatic species. These analyses demonstrate that terrestrial Tetradesmus possess the vegetative desiccation tolerance phenotype, making these species ideal for comparative omics studies.

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Section: Phylogenetic Analysissupporting

confidence: 87%

Section: Phylogenetic Relationships Of Aquatic and Terrestrialtetradesupporting

confidence: 64%

Section: Phylogenetic Relationships Of Aquatic and Terrestrialtetradementioning

confidence: 50%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Desert green algae show higher desiccation tolerance than their aquatic sister-species

Terlova¹,

Holzinger²,

Lewis³

2020

Preprint

View full text Add to dashboard Cite

show abstract

“…For example, Tetradesmus G.M. Smith (Sphaeropleales, Chlorophyceae, Chlorophyta), a common planktonic freshwater genus of unicellular or colonial green algae, contains temperate and desert soil species that are closely related to the aquatic species [13,23,24]. The phylogenetic placement of the aquatic species T. "raciborskii" is distinct from other aquatic species in the genus.…”

Section: Introductionmentioning

confidence: 99%

Terrestrial Green Algae Show Higher Tolerance to Dehydration than Do Their Aquatic Sister-Species

2021

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Diverse algae possess the ability to recover from extreme desiccation without forming specialized resting structures. Green algal genera such as Tetradesmus (Sphaeropleales, Chlorophyceae) contain temperate terrestrial, desert, and aquatic species, providing an opportunity to compare physiological traits associated with the transition to land in closely related taxa. We subjected six species from distinct habitats to three dehydration treatments varying in relative humidity (RH 5%, 65%, 80%) followed by shortand long-term rehydration. We tested the capacity of the algae to recover from dehydration using the effective quantum yield of photosystem II as a proxy for physiological activity. The degree of recovery was dependent both on the habitat of origin and the dehydration scenario, with terrestrial, but not aquatic, species recovering from dehydration. Distinct strains of each species responded similarly to dehydration and rehydration, with the exception of one aquatic strain that recovered from the mildest dehydration treatment. Cell ultrastructure was uniformly maintained in both aquatic and desert species during dehydration and rehydration, but staining with an amphiphilic styryl dye indicated damage to the plasma membrane from osmotically induced water loss in the aquatic species. These analyses demonstrate that terrestrial Tetradesmus possess a vegetative desiccation tolerance phenotype, making these species ideal for comparative omics studies.

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Green land: Multiple perspectives on green algal evolution and the earliest land plants

McCourt

Lewis

Strother

et al. 2023

American J of Botany

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Green plants, broadly defined as green algae and the land plants (together, Viridiplantae), constitute the primary eukaryotic lineage that successfully colonized Earth's emergent landscape. Members of various clades of green plants have independently made the transition from fully aquatic to subaerial habitats many times throughout Earth's history. The transition, from unicells or simple filaments to complex multicellular plant bodies with functionally differentiated tissues and organs, was accompanied by innovations built upon a genetic and phenotypic toolkit that have served aquatic green phototrophs successfully for at least a billion years. These innovations opened an enormous array of new, drier places to live on the planet and resulted in a huge diversity of land plants that have dominated terrestrial ecosystems over the past 500 million years. This review examines the greening of the land from several perspectives, from paleontology to phylogenomics, to water stress responses and the genetic toolkit shared by green algae and plants, to the genomic evolution of the sporophyte generation. We summarize advances on disparate fronts in elucidating this important event in the evolution of the biosphere and the lacunae in our understanding of it. We present the process not as a step‐by‐step advancement from primitive green cells to an inevitable success of embryophytes, but rather as a process of adaptations and exaptations that allowed multiple clades of green plants, with various combinations of morphological and physiological terrestrialized traits, to become diverse and successful inhabitants of the land habitats of Earth.

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A new species of Tetradesmus (Chlorophyceae, Chlorophyta) isolated from desert soil crust habitats in southwestern North America

Cited by 14 publications

References 13 publications

Desert green algae show higher desiccation tolerance than their aquatic sister-species

Desert green algae show higher desiccation tolerance than their aquatic sister-species

Terrestrial Green Algae Show Higher Tolerance to Dehydration than Do Their Aquatic Sister-Species

Green land: Multiple perspectives on green algal evolution and the earliest land plants

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