Phylogenetic position ofJaoa, a green algal genus endemic to China

2013 ◽  
Vol 61 (3) ◽  
pp. 228-236 ◽  
Author(s):  
Huan Zhu ◽  
Shuang Xia ◽  
Qi Zhang ◽  
Guo-Xiang Liu ◽  
Zheng-Yu Hu
Keyword(s):  
Phylogenetic Position ◽  
Green Algal ◽  
Algal Genus

scholarly journals The Rubisco small subunits in the green algal genus Chloromonas provide insights into evolutionary loss of the eukaryotic carbon-concentrating organelle, the pyrenoid

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ryo Matsuzaki ◽  
Shigekatsu Suzuki ◽  
Haruyo Yamaguchi ◽  
Masanobu Kawachi ◽  
Yu Kanesaki ◽  
...  
Keyword(s):  
Evolutionary Biology ◽  
De Novo ◽  
Small Subunit ◽  
Plant Evolution ◽  
Reaction Products ◽  
Photosynthetic Organisms ◽  
Green Algal ◽  
Interesting Study ◽  
Algal Genus ◽  
The Relationship

Abstract Background Pyrenoids are protein microcompartments composed mainly of Rubisco that are localized in the chloroplasts of many photosynthetic organisms. Pyrenoids contribute to the CO2-concentrating mechanism. This organelle has been lost many times during algal/plant evolution, including with the origin of land plants. The molecular basis of the evolutionary loss of pyrenoids is a major topic in evolutionary biology. Recently, it was hypothesized that pyrenoid formation is controlled by the hydrophobicity of the two helices on the surface of the Rubisco small subunit (RBCS), but the relationship between hydrophobicity and pyrenoid loss during the evolution of closely related algal/plant lineages has not been examined. Here, we focused on, the Reticulata group of the unicellular green algal genus Chloromonas, within which pyrenoids are present in some species, although they are absent in the closely related species. Results Based on de novo transcriptome analysis and Sanger sequencing of cloned reverse transcription-polymerase chain reaction products, rbcS sequences were determined from 11 strains of two pyrenoid-lacking and three pyrenoid-containing species of the Reticulata group. We found that the hydrophobicity of the RBCS helices was roughly correlated with the presence or absence of pyrenoids within the Reticulata group and that a decrease in the hydrophobicity of the RBCS helices may have primarily caused pyrenoid loss during the evolution of this group. Conclusions Although we suggest that the observed correlation may only exist for the Reticulata group, this is still an interesting study that provides novel insight into a potential mechanism determining initial evolutionary steps of gain and loss of the pyrenoid.

Numerical classification of the Pacific forms of Chlorodesmis (Chlorophyta)

1965 ◽  
Vol 13 (3) ◽  
pp. 489 ◽  
Author(s):  
SC Ducker ◽  
WT Williams ◽  
GN Lance
Keyword(s):  
Mixed Data ◽  
Critical Examination ◽  
Numerical Classification ◽  
Control Data ◽  
Green Algal ◽  
The Pacific ◽  
Algal Genus ◽  
Single Genus

The boundaries of the green algal genus Chlorodesmis are ill defined, and the reported species appear to overlap widely. Fourreen specimens of the large-celled (Pacific) forms have been subjected to critical examination; the specimens had previously been ascribed to three genera and eight species. Six characters (one qualitative, three 3-state, and two numerical) have been used; the numerical characters, for which measures of variation are available, have been subjected to a conventional statistical examination, and all six characters have been used in an analysis of the data by means of the mixed-data classificatory programme MULTIST on the Control Data 3600 at Canberra. The results strongly suggest that the specimens are referable to a single genus with only four species: C. caespitosa J. Agardh, C. comosa Harvey & Bailey, C. major Zanardini, and C. bulbosa (Womersley) Ducker.

Concise review of green algal genus Ulva Linnaeus

2020 ◽  
Vol 32 (5) ◽  
pp. 2725-2741
Author(s):  
Vaibhav A. Mantri ◽  
Mudassar Anisoddin Kazi ◽  
Nikunj B. Balar ◽  
Vishal Gupta ◽  
Tejal Gajaria
Keyword(s):  
Green Algal ◽  
Concise Review ◽  
Algal Genus

Taxonomy and distribution of the green algal genus Codium (Bryopsidales, Chlorophyta) in Brazil

Nova Hedwigia ◽  
2010 ◽  
Vol 91 (1) ◽  
pp. 87-109 ◽  
Author(s):  
Maria de Fátima de Oliveira-Carvalho ◽  
Sonia Maria Barreto Pereira ◽  
Francisco Flores Pedroche
Keyword(s):  
Green Algal ◽  
Algal Genus

Species boundaries and phylogenetic relationships within the green algal genus Codium (Bryopsidales) based on plastid DNA sequences

2007 ◽  
Vol 44 (1) ◽  
pp. 240-254 ◽  
Author(s):  
Heroen Verbruggen ◽  
Frederik Leliaert ◽  
Christine A. Maggs ◽  
Satoshi Shimada ◽  
Tom Schils ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Plastid Dna ◽  
Species Boundaries ◽  
Green Algal ◽  
Algal Genus

scholarly journals Morphology and phylogenetic position of Spongiochrysis hawaiiensis gen. et sp. nov., the first known terrestrial member of the order Cladophorales (Ulvophyceae, Chlorophyta)

2006 ◽  
Vol 56 (4) ◽  
pp. 913-922 ◽  
Author(s):  
Fabio Rindi ◽  
Juan M. López-Bautista ◽  
Alison R. Sherwood ◽  
Michael D. Guiry
Keyword(s):  
Phylogenetic Analyses ◽  
18S Rrna Gene ◽  
Phylogenetic Position ◽  
Rrna Gene ◽  
Holotype Specimen ◽  
Green Algal ◽  
Golden Yellow ◽  
Terrestrial Habitats ◽  
Well Differentiated ◽  
Globular Cells

Spongiochrysis hawaiiensis gen. et sp. nov. is described from material collected at two sites on O'ahu, Hawaiian Islands. This alga produced golden-yellow crusts on the bark of Casuarina trees and consisted of globular cells with an axial stellate chloroplast. The only form of reproduction was a specialized type of autosporulation in which a budding-like division of the mother cell produced daughter cells of different sizes. Phylogenetic analyses of the 18S rRNA gene showed that Spongiochrysis hawaiiensis is a member of the freshwater clade of the Cladophorales/Siphonocladales lineage in the green algal class Ulvophyceae. On the basis of its unicellular habit and terrestrial habitat, this species is well differentiated from all other members of the same lineage and can be considered as the first known successful step of a member of the order Cladophorales into terrestrial habitats. The implications of the description of this species with regard to both green algal evolution and conservation of little-known tropical habitats are discussed. The holotype specimen of Spongiochrysis hawaiiensis is GALW015489 and isotype specimens have also been deposited in the BISH and BM herbaria.

scholarly journals Modeling the growth and sporulation dynamics of the macroalga Ulva in mixed-age populations in cultivation and the formation of green tides

2021 ◽  
Author(s):  
Uri Obolski ◽  
Thomas Wichard ◽  
Alvaro Israel ◽  
Alexander Golberg ◽  
Alexander Liberzon
Keyword(s):  
Differential Equation ◽  
Biomass Accumulation ◽  
Equation Model ◽  
Green Tides ◽  
Industrial Growth ◽  
Green Algal ◽  
Algal Genus ◽  
Potential Impact ◽  
Future Work ◽  
Mixed Age

Abstract. Ulva is a widespread green algal genus with important ecological roles and promising potential as a seagriculture crop. One of the major challenges when cultivating Ulva is sudden biomass disappearance, likely caused by uncontrolled and unpredicted massive sporulation. However, the dynamics of this process are still poorly understood. In this study, we propose a mathematical model describing the biomass accumulation and degradation of Ulva, considering the potential impact of sporulation inhibitors. We developed a differential equation model describing the time evolution of Ulva biomass. Our model simulates biomass in compartments of different Ulva ‘age’ classes, with varying growth and sporulation rates. Coupled with these classes is a differential equation describing the presence of a sporulation inhibitor, produced and secreted by the algae. Our model mimics observed Ulva dynamics. We present Ulva's biomass accumulation under different initial algae population age distributions and sporulation rates. Furthermore, we simulate water replacement, effectively depleting the sporulation inhibitor, and examine its effects on Ulva's biomass accumulation. The model developed in this work is the first step towards understanding the dynamics of Ulva growth and degradation. Future work refining and expanding our results should prove beneficial to the ecological research and industrial growth of Ulva.

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