Nitrate and Ammonium Uptake in Green Algae and Higher Plants: Mechanism and Relationship with Nitrate Metabolism

1987 ◽  
pp. 32-38 ◽  
Author(s):  
W. R. Ullrich
Keyword(s):  
Green Algae ◽  
Higher Plants ◽  
Ammonium Uptake ◽  
Nitrate Metabolism

A Scanning Electron Microscopic Study of Pro-Vascular Cellular Morphology in Chaetophora Incressata

1985 ◽  
Vol 43 ◽  
pp. 638-639
Author(s):  
A. E. Hotchkiss ◽  
A. T. Hotchkiss ◽  
R. P. Apkarian
Keyword(s):  
Green Algae ◽  
Vascular Plants ◽  
Vascular System ◽  
Higher Plants ◽  
Wall Structure ◽  
Electron Microscopic ◽  
Physiological Processes ◽  
Scanning Electron Microscopic Study ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

Multicellular green algae may be an ancestral form of the vascular plants. These algae exhibit cell wall structure, chlorophyll pigmentation, and physiological processes similar to those of higher plants. The presence of a vascular system which provides water, minerals, and nutrients to remote tissues in higher plants was believed unnecessary for the algae. Among the green algae, the Chaetophorales are complex highly branched forms that might require some means of nutrient transport. The Chaetophorales do possess apical meristematic groups of cells that have growth orientations suggestive of stem and root positions. Branches of Chaetophora incressata were examined by the scanning electron microscope (SEM) for ultrastructural evidence of pro-vascular transport.

Creativity Thinks on the Significances of Geobiology about the Coal Series

2014 ◽  
Vol 1065-1069 ◽  
pp. 114-118
Author(s):  
Shuo Fu Tian ◽  
Chao Jin Lu ◽  
Yuan Wang
Keyword(s):  
Green Algae ◽  
Higher Plants ◽  
The Other ◽  
Coal Bed ◽  
Geologic History ◽  
Blue Green Algae ◽  
Living Things ◽  
Coal Petrology ◽  
The Relationship ◽  
Lower Plants

It is the components, living things evolution processes, development environments, distribution layers and the earliest time for coal series formation that are investigated and studied in detail based on the author’s graduation thesis, the “Geobiology” , the “China coal petrology” and the other’s some references in this paper. And it is considered that mainly two types of the Coal Series might be distinguish in the geologic history in China, respectively consisted of the lower organisms (especially the lower plants, blue-green algae) and higher organisms (especially the higher plants, pteridophyta, gymnosperms, Anthophyta). Meanwhile, the conclusions can be drawn that the development of the organisms is not only controlled by the environments, on the other hand, the environments and their sediments are also affected by the ecologies of the organisms. So the coal bed or coal series can be used as the marks of the environment explanation, perhaps having some Significances of Geobiology. In additional, the relationship with an unconformity or disconformity is discussed here, too.

scholarly journals Cinnamic acid and p-coumaric acid, precursors of ubiquinone in higher plants, green algae and fungi

1970 ◽  
Vol 118 (3) ◽  
pp. 55P-55P ◽  
Author(s):  
D R Threlfall ◽  
A Law ◽  
G R Whistance
Keyword(s):  
Green Algae ◽  
Cinnamic Acid ◽  
Higher Plants ◽  
Coumaric Acid

Interaction, functional relations and evolution of large and small subunits in Rubisco from Prokaryota and Eukaryota

1986 ◽  
Vol 313 (1162) ◽  
pp. 347-358 ◽  
Keyword(s):  
Green Algae ◽  
Higher Plants ◽  
Atmospheric Oxygen ◽  
Chloroplast Transformation ◽  
Chromatium Vinosum ◽  
Ribulose Bisphosphate Carboxylase ◽  
Carboxylase Activity ◽  
Bisphosphate Carboxylase ◽  
Unicellular Cyanobacterium ◽  
Functional Relations

In early biological evolution anoxygenic photosynthetic bacteria may have been established through the acquisition of ribulose bisphosphate carboxylase-oxygenase (Rubisco). The establishment of cyanobacteria may have followed and led to the production of atmospheric oxygen. It has been postulated that a unicellular cyanobacterium evolved to cyanelles which were evolutionary precursors of chloroplasts of both green and non-green algae. The latter probably diverged from ancestors of green algae as evidenced by the occurrence of large (L) and small (S) subunit genes for Rubisco in the chloroplast genome of the chromophytic algae Olisthodiscus luteus . In contrast, the gene for the S subunit was integrated into the nucleus in the evolution of green algae and higher plants. The evolutionary advantages of this integration are uncertain because the function of S subunits is unknown. Recently, two forms of Rubisco (L 8 and L 8 S 8 ) of almost equivalent carboxylase and oxygenase activity have been isolated from the photosynthetic bacterium Chromatium vinosum . This observation perpetuates the enigma of S subunit function. Current breakthroughs are imminent, however, in our understanding of the function of catalytic L subunits because of the application of deoxyoligonucleotide-directed mutagenesis. Especially interesting mutated Rubisco molecules may have either enhanced carboxylase activity or higher carboxylase: oxygenase ratios. Tests of expression, however, must await the insertion of modified genes into the nucleus and chloroplasts. Methodology to accomplish chloroplast transformation is as yet unavailable. Recently, we have obtained the first transformation of cyanobacteria by a colE1 plasmid. We regard this transformation as an appropriate model for chloroplast transformation.

scholarly journals CHLOROPHYLL BINDING PROTEINS WITH ANTENNA FUNCTION IN HIGHER PLANTS and GREEN ALGAE

1990 ◽  
Vol 52 (6) ◽  
pp. 1187-1206 ◽  
Author(s):  
Roberto Bassi ◽  
Fernanda Rigoni ◽  
Giorgio M. Giacometti
Keyword(s):  
Green Algae ◽  
Binding Proteins ◽  
Higher Plants
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