Succinate Dehydrogenase

Burke, John J.; Siedow, James N.; Moreland, Donald E.

doi:10.1104/pp.70.6.1577

Cited by 48 publications

(10 citation statements)

References 26 publications

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“…also been observed in chloroplasts of plants treated with either diuron [ 121, bentazon [8,13], or atrazine [ 10,11,14,16], herbicides that inhibit electron transport at the donor site of photosystem 11. Additionally, chloroplasts of plants treated with atrazine [ 14-161 have a higher unsaturation index of fatty acids for thylakoid lipids.…”

Section: Jcbmentioning

confidence: 99%

Adaptive reorganization of protein and lipid components in chloroplast membranes as associated with herbicide binding

Mattoo

John

Wergin

1984

J of Cellular Biochemistry

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Cultivation of Spirodela oligorrhiza ( Kurtz ) Hegelm on a sublethal dose of atrazine results in a higher linolenic to linoleic acid ratio in the thylakoid membrane lipids, less starch, more osmiophilic globules, and a reduced stroma lamellar system. Also, the grana become randomly oriented and contain more numerous and elongated lamellae. These alterations in the lipid composition and ultrastructure of the chloroplast resemble those previously observed in triazine-resistant weed biotypes and in chloroplasts developed under low light. Thylakoid membranes from atrazine-adapted plants revealed an additional high-affinity binding constant for [14C]-diuron but the number of diuron binding sites actually decreased by 20 times compared to controls. The 32,000-dalton membrane protein of the chloroplast is synthesized actively, but its breakdown appears decreased compared to control plants. The adaptive reorganization of thylakoid components may be a compensatory mechanism for maintenance of a functional interaction of the proteins and lipids of the photosystem II complex.

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Section: Jcbmentioning

confidence: 99%

Adaptive reorganization of protein and lipid components in chloroplast membranes as associated with herbicide binding

Mattoo

John

Wergin

1984

J of Cellular Biochemistry

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“…SDH activity was determined by measuring SDH-phenazine methosulfate reductase activity (Burke et al, 1985). Mitochondria were placed in a medium containing 30 mM Tricine-NaOH (pH 7.5), 0.25 to 8 mM succinate, and 1 mM phenazine methosulfate.…”

Section: Sdh Assaymentioning

confidence: 99%

Direct Inhibition of Plant Mitochondrial Respiration by Elevated CO2

et al. 1996

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Doubling the concentration of atmospheric CO, often inhibits plant respiration, but the mechanistic basis of this effect is unknown. We investigated the direct effects of increasing the concentration of CO, by 360 p l 1-' above ambient on O, uptake in isolated mitochondria from soybean (Glycine max L. cv Ransom) cotyledons. lncreasing the CO, concentration inhibited the oxidation of succinate, external NADH, and succinate and external N A D H combined. The inhibition was greater when mitochondria were preincubated for 10 min in the presence of the elevated CO, concentration prior to the measurement of O, uptake. Elevated CO, concentration inhibited the salicylhydroxamic acid-resistant cytochrome pathway, but had no direct effect on the cyanide-resistant alternative pathway. W e also investigated the direct effects of elevated CO, concentration on the activities of cytochrome c oxidase and succinate dehydrogenase (SDH) and found that the activity of both enzymes was inhibited. The kinetics of inhibition of cytochrome coxidase were time-dependent. The leve1 of SDH inhibition depended on the concentration of succinate in the reaction mixture. Direct inhibition of respiration by elevated CO, in plants and intact tissues may be due at least in part to the inhibition of cytochrome c oxidase and SDH.

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“…Except for complex II, i.e. succinic-dehydrogenase (3), few data are presently available concerning fractionation and characterization of redox complexes such as NADH-dehydrogenase or ubiquinolCyt c oxidoreductase.…”

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confidence: 99%

Functional Characterization and Partial Purification of the Ubiquinol-Cytochrome c Oxidoreductase from Higher Plant Mitochondria (Helianthus tuberosus)

Esposti¹,

Flamini²,

Zannoni³

1985

Plant Physiol.

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The functional and thermodynamic characteristics of the ubiquinolcytochrome (Cyt) c oxidoreductase in a Cyt b/c,-enriched fraction (defined S-1) isolated from Jerusalem artichoke mitochondria (JAM) (Helianthus tuberosus), have been analyzed. Fraction S-1, obtained through deoxycholate-KCI fractionation procedure, contained one Cyt ofc type (formally cl with Em7.0 of +240 millivolts), two b type Cyt with Em7.. values of +100 and -25 millivolts, ferredoxin-like centers presumably linked to succinic-and NADH-dehydrogenases, and a Rieske-type iron sulfur center (gy = 1.89). The ubiquinol-dependent Cyt c reduction by fraction S-I showed sensitivity to antimycin A, myxothiazol, and n-2-hepthyl-1-hydroxyquinoline N-oxide with I50 of 12 nanomolar, 30 nanomolar, and 0.1 micromblar, respectively. Oxidation-induced extra b type reduction, a widespread phenomenon of bacterial and mitochondrial respiratory systems, has also been observed in both intact mitochondria and S-1 fraction. The data seem to blur previous experiments in which both spectral and functional differences between higher plant and mammalian mitochondria have been underlined.The respiratory chains of eukaryotic and prokaryotic systems are an assembly of more than twenty discrete carriers ofelectrons together with an unspecific number of structural peptides (30). While the function of the respiratory chain as an oxidationreduction driven proton-pump is now accepted (30), the structural basis underlying this function is only partially understood (30). Owing to this, respiratory and photosynthetic electron transport in mammalian mitochondria, photosynthetic bacteria, blue-green algae, and chloroplasts have been analyzed throtgh isolation and characterization of multiple redox complexes (12). However, little effort has been made to try to understand both structural and redox properties of respiratory complexes from plant mitochondria. Published experimentation dealt with partial purification of either the b type Cyt from mung bean (Phaseolus aureus) and potato tuber mitochondria (8,13) (14). Evidence for the presence of a Rieske-type iron-sulfur center (gy = 1.89) is also presented.

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Succinate Dehydrogenase

Cited by 48 publications

References 26 publications

Adaptive reorganization of protein and lipid components in chloroplast membranes as associated with herbicide binding

Adaptive reorganization of protein and lipid components in chloroplast membranes as associated with herbicide binding

Direct Inhibition of Plant Mitochondrial Respiration by Elevated CO2

Functional Characterization and Partial Purification of the Ubiquinol-Cytochrome c Oxidoreductase from Higher Plant Mitochondria (Helianthus tuberosus)

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