منابع مشابه
The Enigmatic Metabolite Transport in Plant Mitochondria Lacking Proton Motive Force - news from Durum Wheat Mitochondria
Mitochondria play a central role in all aerobic eukaryotic cells, being the site of respiration and synthesis of ATP via Oxidative Phosphorylation (OXPHOS). According to the chemo-osmotic theory, this occurs bycoupling substrate oxidation by the respiratory chain with proton ejection in the intermembrane space [1,2], thus generatingan electrical membrane potential (ΔΨ), which is the main compon...
متن کاملPossible plant mitochondria involvement in cell adaptation to drought stress. A case study: durum wheat mitochondria.
Although plant cell bioenergetics is strongly affected by abiotic stresses, mitochondrial metabolism under stress is still largely unknown. Interestingly, plant mitochondria may control reactive oxygen species (ROS) generation by means of energy-dissipating systems. Therefore, mitochondria may play a central role in cell adaptation to abiotic stresses, which are known to induce oxidative stress...
متن کاملComplementation of isolated mitochondria from several wheat varieties.
Sarkissian (4) and Sarkissian and Srivastava (6) have pointed out a close correlation between complementation and heterosis effects with intact mitochondria isolated from wheat coleoptiles. In their experiments, mitochondria which were isolated from coleoptiles of heterozygous F1 plants show significantly higher values for 02 uptake, esterification of inorganic phosphate, and especially for res...
متن کاملChloroplast-like transfer RNA genes expressed in wheat mitochondria.
In the course of a systematic survey of wheat mitochondrial tRNA genes, we have sequenced chloroplast-like serine (trnS-GGA), phenylalanine (trnF-GAA) and cysteine (trnC-GCA) tRNA genes and their flanking regions. These genes are remnants of 'promiscuous' chloroplast DNA that has been incorporated into wheat mtDNA in the course of its evolution. Each gene differs by one or a few nucleotides fro...
متن کاملTransport Pathways—Proton Motive Force Interrelationship in Durum Wheat Mitochondria
In durum wheat mitochondria (DWM) the ATP-inhibited plant mitochondrial potassium channel (PmitoK(ATP)) and the plant uncoupling protein (PUCP) are able to strongly reduce the proton motive force (pmf) to control mitochondrial production of reactive oxygen species; under these conditions, mitochondrial carriers lack the driving force for transport and should be inactive. However, unexpectedly, ...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1977
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.59.4.623