Investigations on the phototactic orientation of Anabaena variabilis

@article{Nultsch2004InvestigationsOT,
  title={Investigations on the phototactic orientation of Anabaena variabilis},
  author={Wilhelm Nultsch and Hartwig Schuchart and Marga H{\"o}hl},
  journal={Archives of Microbiology},
  year={2004},
  volume={122},
  pages={85-91}
}
Phototaxis of the blue-green alga Anabaena variabilis was studied using both population method and observation of single trichomes by microscope. The trichomes react positively at low and negatively at high illuminance. The inversion point lies at about 1000 1x. The action spectrum of positive phototaxis indicates that the photosynthetic pigments chlorophyll a, C-phycocyanin and allo-phycocyanin are involved in the absorption of the active light. The same range of wavelengths is active in… Expand

Figures from this paper

Photophobic responses of the cyanobacterium Anabaena variabilis
TLDR
The photophobic responses in the Cyanobacterium Anabaena variabilis which belongs to the Nostocaceae have been studied with aid of a population method as well as by single trichome observations, indicating that the reaction is coupled with the non cyclic photosynthetic electron transport. Expand
Phototaxis in the flagellates, Euglena gracilis and Ochromonas danica
TLDR
The hypothesis that negative phototaxis may be brought about by repetitive step-up phobic responses can be rejected for at least this organism. Expand
A model of the phototactic reaction chain of the cyanobacterium Anabaena variabilis
The hypothesis has been proposed that in Anabaena variabilis the phototactic reaction sign is regulated by an unknown reaction sign reversal generator which is controlled by the intracellular levelExpand
Photomovement of the red alga Porphyridium cruentum (Ag.) Naegeli
Phototaxis of the unicellular red alga Porphyridium cruentum was studied by staining the slime tracks of individual cells as well as with the aid of a population method. Because of the increasedExpand
Effects of sodium azide on phototaxis of the blue-green alga Anabaena variabilis and consequences to the two-photoreceptor systems-hypothesis
TLDR
The hypothesis is suggested that the phototactic reaction-sign reversal generator of Anabaena is controlled by the level of an active oxygen species, probably singlet oxygen, which is quenched by azide. Expand
Photomovement of the red alga Porphyridium cruentum (Ag.) naegeli I. Photokinesis
TLDR
From the action spectrum and the results of inhibitor experiments with DCMU, DBMIB and DSPD it is concluded that the photokinetic effect is due to an additional ATP supply from non- cyclic and/or pseudo-cyclic photophosphorylation to the motor apparatus. Expand
The cyanobacterial phytochrome Cph2 inhibits phototaxis towards blue light
TLDR
It is proposed that the Cph2 protein is part of a light‐stimulated signal transduction chain inhibiting the movement of Synechocystis sp. Expand
Lichtorientierte Bewegungen bei Cyanobakterien
TLDR
A model of the phototactic reaction chain is proposed and it is proposed that this highly active oxygen species produced at high irradiances in side reactions of photosynthesis would cause photooxidative death, this behavioral control mechanism is ecologically feasible. Expand
The role of cyanopterin in UV/blue light signal transduction of cyanobacterium Synechocystis sp. PCC 6803 phototaxis.
TLDR
It is suggested that pterin can function as the chromophore of putative UV/blue photoreceptor(s) in cyanobacterial phototaxis by investigating the photomovement of the wild-type and pgtA mutant to UV and blue light. Expand
Cyanobacteriochromes: a new superfamily of tetrapyrrole-binding photoreceptors in cyanobacteria.
  • M. Ikeuchi, T. Ishizuka
  • Biology, Medicine
  • Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology
  • 2008
TLDR
A new group of photoreceptors has been experimentally revealed in cyanobacteria and are proposed to be "cyanobacteriochromes", characterized by the presence of a chromophore-binding GAF domain that is homologous to the tetrapyrrole-bindingGAF domain of the phytochrome. Expand
...
1
2
3
...

References

SHOWING 1-10 OF 26 REFERENCES
Studies on Phototopotaxis in the Blue-green Alga, Cylindrospermum
TLDR
It is concluded that the speed of phototopotaxis is directly related to the growth of cultures and that the process is energized by photosynthesis and respiration. Expand
Untersuchungen zur Photokinesis von Anabaena variabilis Kützing
TLDR
It is concluded that in Ph. ambiguum, the photokinetic effect is the result of an additional ATP supply from cyclic photophosphorylation with photosystem I, while in Anabaena variabilis the acceleration of movement by light is due to an energy supply from a phosphorylation process of the pseudocyclic type which is mediated by both the photosystems I and II. Expand
Der Einfluss des Lichtes auf die Bewegung der Cyanophyceen
SummaryA method for quantitative evaluation of phototactic experiments is described which is especially suitable for Cyanophyceae of theOscillatoria-Phormidium type. The zero threshold for topotaxisExpand
Photomophogenesis in the Blue‐green Alga Nostoc commune 584
TLDR
The blue-green alga Nostoc commune 584 displays a photocontrolled developmental cycle similar to that described for N. muscorum A which promotes motility in non-motile cultures, and the motility-promoting substances from both species are reciprocally active. Expand
Action Spectra for Phycobiliprotein Synthesis in a Chromatically Adapting Cyanophyte, Fremyella diplosiphon.
TLDR
The action spectra suggest that the photoreceptor or photoreceptors which regulate phycobiliprotein metabolism in F. diphosiphon may be either one or two metalloporphyrin complexes or double pigment systems consisting of a red or green light-absorbing Photoreceptor which can be activated directly or by energy transferred from a blue light- absorbing receptor. Expand
PHOTOINDUCTION AND PHOTOREVERSAL OF THE NOSTOCACEAN DEVELOPMENTAL CYCLE 1
TLDR
The developmental cycle of Nostoc muscorum, a nitrogen‐fixing blue‐green alga, is controlled by the spectral quality of illumination, and photo‐reversibility of the red‐light induction, by green light, decays very slowly, remaining at an appreciable level for over 24 hr after the primary stimulus. Expand
Action Spectra for Chromatic Adaptation in Tolypothrix tenuis.
TLDR
Chromatic adaptation and another photomorphogenic response in the blue-green algae are discussed in terms of possible regulation by a photoreversible pigment recently isolated from Tolypothrix. Expand
Der Einfluß von Licht auf die Atmung von Chlorella bei gehemmter Photosynthese
TLDR
The decreased O2-consumption in the light is considered to result from a partial inhibition of respiration and not from remaining photosynthesis unaffected by 10-5M DCMU, and chlorophyll is thought to be the pigment responsible for light-dependent inhibition of O 2-uptake. Expand
Action Spectrum for Developmental Photo-Induction of the Blue-Green Alga Nostoc muscorum
TLDR
A blue protein, presumably allophycocyanin (absorption maximum, 650 m�) has been demonstrated in aqueous extracts of the cyanophycean cells. Expand
Distribution of excitation energy among photosystem I and photosystem II in red algae. I. Action spectra of light reactions I and II.
TLDR
Action spectra of light reaction I and light reaction II from red algae were measured with 550 nm or 699 nm background light, using a Teflon-covered platinum electrode for O2 measurement and some evidence is shown that strongly supports model 2. Expand
...
1
2
3
...