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A chimeric photoreceptor gene, NEOCHROME, has arisen twice during plant evolution.
TLDR
Two genes resembling Adiantum PHY3, NEOCHROME1 and NEOCHRome2 (MsNEO1 and MsNEO2), in the green alga Mougeotia scalaris, a plant famous for its light-regulated chloroplast movement are identified, providing an intriguing example of convergent evolution.
Primary and secondary chloride transport in Halobacterium halobium
TLDR
Two structurally independent chloride transport systems could be distinguished: halorhodopsin, the already known light-driven chloride pump, and a newly described secondary uptake system, which was energized by respiration or by light via bacteriorhodopsins.
Potassium uniport and ATP synthesis in Halobacterium halobium.
Light-driven potassium ion uptake in Halobacterium halobium is mediated by bacteriorhodopsin. This uptake is charge-balanced by sodium ions and not by proton release. Light-induced shifts in
The Physiology of Tropisms
TLDR
The historic work of Darwin, a century ago, has set a landmark in the field of plant movements, particularly in the category of directed growth (Darwin 1896), which responds in spatial orientation to environmental stimuli such as light, gravity, temperature and water.
Identification of calmodulin in the green alga Mougeotia and its possible function in chloroplast reorientational movement
TLDR
The Ca2+-calmodulin may act as an intermediate in the chloroplast reorientational response in Mougeotia governed by phytochrome.
Heterologous Expression and Characterization of Recombinant Phytochrome from the Green Alga Mougeotia scalaris ¶
TLDR
Comparison with an action spectrum reported earlier gives evidence that in Mougeotia, as formerly reported for the green alga Mesotaenium caldariorum, PCB constitutes the genuine chromophore.
Reversible Inhibition of Chloroplast Movement by Cytochalasin B in the Green Alga Mougeofia
Light-oriented chloroplast movement is reversibly inhibited by cytochalasin B. The photoperception is not influenced by this inhibitor. These results support the assumption that contractile protein
Mechanism of chloroplast movement inMougeotia
TLDR
Precise reorientation of the chloroplast is proposed to be brought about by a dual function of phytochrome: regulation of the cellular level of calcium and regulation of membrane anchorage sites to actin.
DIFFERENTIAL EFFECT OF CALCIUM ON CHLOROPLAST MOVEMENT IN MOUGEOTIA
TLDR
It could be shown that chloroplast movement decreases parallel to a nitric acid soluble fraction of intracellular calcium, which might indicate that phytochrome governs chloropine movement in Mougeotia via control of the binding state of calcium.
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