Light respiration in Lemna trisulca

Pb-Induced Avoidance-Like Chloroplast Movements in Fronds of Lemna trisulca L.

Lead ions are particularly dangerous to the photosynthetic apparatus, but little is known about the effects of trace metals, including Pb, on regulation of chloroplast redistribution. In this study a new effect of lead on chloroplast distribution patterns and movements was demonstrated in mesophyll cells of a small-sized aquatic angiosperm Lemna trisulca L. (star duckweed). An analysis of confo...

Consequences of respiration in the light

Cyanide-resistant respiration in light- and dark-grown soybean cotyledons.

Measurements of respiration were made on intact tissue and mitochondria isolated from soybean (Glycine max [L.] Merr. cv ;Corsoy') cotyledons from seedlings of different ages grown in light and darkness. Effects of cyanide (KCN) and salicylhydroxamic acid (SHAM) on O(2) uptake rates were determined. O(2) uptake was faster in light-grown tissue and was inhibited by both KCN and SHAM in all excep...

Inhibition of Respiration in Prototheca zopfii by Light.

Irradiation of cells of Prototheca zopfii with blue light inhibited the respiratory capacity of the cells. The inhibition of respiration was correlated with a photodestruction of cytochrome c(551), cytochrome b(559), and cytochrome a(3). Cytochrome c(549), cytochrome b(555), and cytochrome b(564) were unaffected by the irradiation treatment. The alpha-band of reduced cytochrome a was shifted fr...

Respiration and light-induced phosphorylation in extracts of Rhodospirillum rubrum.

As in many other kinds of bacteria, the addition of oxygen to anaerobic photosynthetic bacteria in the dark results in the oxidation of the cytochrome pigments of the respiratory chain (1, 2). Illumination of the anaerobic bacteria results in the oxidation of the respiratory chain cytochrome system as well as at least one additional cytochrome pigment (2). This type of observation, and work on ...