Abstract Die bedeutsamsten Mitglieder der Naturstoffgruppe der Phenanthroperylenchinone
sind Hypericin und Stentorin. Sie sind wegen des Vorliegens von Tautomerie …

Photomotile responses in microorganisms are aimed at escaping harmful light intensities
and obtaining the best illumination conditions for growth and metabolism. In some colored …

When exposed, in the presence of molecular oxygen, to light intensities of the order of3–30
W m‐2, the ciliate Blepharisma japonicum changes its color from red to blue, because of the …

Many freely motile microorganisms can perceive and transduce external photic stimuli to the
motor apparatus, eventually moving, by means of various behavioural strategies, into …

Time-correlated single photon counting was used to observe dynamic quenching of the
hypericin and stentorin excited singlet states. The fluorescence quenching data for hypericin …

The toxic and phototoxic properties of blepharismin and oxyblepharismin that were purified
from the pigments of a ciliated protozoan, Blepharisma japonicum, by thin‐layer …

The defense function of pigment granules in the red ciliate Blepharisma japonicum against
two predatory protists, Amoeba proteus and Climacostomum virens, was investigated by (1) …

Among the ciliates, Stentor amethystinus stands out for its conspicuous red-violet color
compared to its blue-and red-colored relatives Stentor coeruleus and Blepharisma …

The principal behavioral responses of ciliates to photic stimuli are briefly illustrated, with
special attention to step-up photophobic reactions and phototaxis in Blepharisma …

Blepharisma japonicum is a ciliated protozoan exhibiting a strong step-up photophobic
response upon illumination. The photoreceptor chromophores responsible for this response …