High Glycolate Oxidase Activity Is Required for Survival of Maize in Normal Air1[OA]

@article{Zelitch2008HighGO,
  title={High Glycolate Oxidase Activity Is Required for Survival of Maize in Normal Air1[OA]},
  author={Israel Zelitch and Neil P. Schultes and Richard B Peterson and Patrick H Brown and Thomas P. Brutnell},
  journal={Plant Physiology},
  year={2008},
  volume={149},
  pages={195 - 204}
}
A mutant in the maize (Zea mays) Glycolate Oxidase1 (GO1) gene was characterized to investigate the role of photorespiration in C4 photosynthesis. An Activator-induced allele of GO1 conditioned a seedling lethal phenotype when homozygous and had 5% to 10% of wild-type GO activity. Growth of seedlings in high CO2 (1%–5%) was sufficient to rescue the mutant phenotype. Upon transfer to normal air, the go1 mutant became necrotic within 7 d and plants died within 15 d. Providing [1-14C]glycolate to… Expand
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References

SHOWING 1-10 OF 52 REFERENCES
Reduction to below threshold levels of glycolate oxidase activities in transgenic tobacco enhances photoinhibition during irradiation.
TLDR
Photosynthesis was susceptible to photoinhibition with reduction to below threshold levels of GO activities and that higher activities of GO are required under a higher irradiation, suggesting that the photosystem was disturbed when the concentration of the substrate for the Calvin cycle decreased until it became insufficient to receive the excess photon energy generated in each light environment. Expand
A mutant of Nicotiana sylvestris deficient in serine glyoxylate aminotransferase activity
TLDR
A photorespiration mutant of Nicotiana sylvestris lacking serine: glyoxylate aminotransferase activity was isolated in the M2 generation following EMS mutagenesis, indicating that air sensitivity in NS 349 results from a single nuclear recessive mutation eliminating SGAT activity. Expand
The value of mutants unable to carry out photorespiration
TLDR
The value of these mutant plants in the elucidation of the mechanism of photorespiration and its relationships with CO2 fixation and amino acid metabolism are highlighted. Expand
Alternate pathways of glycolate synthesis in tobacco and maize leaves in relation to rates of photorespiration.
TLDR
Glycolate is believed to be the primary substrate of photorespiration, and sufficiently rapid rates of glycolate synthesis have been observed in tobacco to account for this function, and the high rates of photOREspiration observed in Tobacco leaves compared with maize result partly from differences between these species in the pathway of gly colate synthesis. Expand
C4 Photosynthesis (The Effects of Leaf Development on the CO2-Concentrating Mechanism and Photorespiration in Maize)
TLDR
Analysis of maize leaves showed that the degree of inhibition of photosynthesis by supraoptimal levels of O2 increased rapidly once the ribulose-1,5-bisphosphate carboxylase/oxygenase and chlorophyll contents were below a critical level and was similar to that of C3 plants. Expand
Oxygen and electron flow in C4 photosynthesis: Mehler reaction, photorespiration and CO2 concentration in the bundle sheath
TLDR
It is concluded that when C4 photosynthesis is limited by supply of atmospheric CO2 to the C4 cycle, the C3 cycle becomes limited by regeneration of ribulose 1,5-bisphosphate (RuBP) which in turn limits RuBP oxygenase activity and photorespiration. Expand
Plant peroxisomes respire in the light: some gaps of the photorespiratory C2 cycle have become filled--others remain.
TLDR
This review highlights recent developments in understanding photorespiration and identifies remaining gaps in knowledge of this important metabolic pathway. Expand
Species variation in the specificity of ribulose biphosphate carboxylase/oxygenase
The balance between photosynthesis and photorespiration in many species, including most crop plants, is determined by the kinetic properties of ribulose-l,5-bisphosphate (RuBP)Expand
Photorespiratory rates in wheat and maize as determined by o-labeling.
TLDR
The results from maize tissue support the hypothesis that C(4) plants photorespire, albeit at a reduced rate in comparison to C(3) plants, and that the CO(2)/O(2) ratio in the bundle sheath of maize is higher in mature tissue than in seedling tissue. Expand
Plant Photorespiration—An Inevitable Consequence of the Existence of Atmospheric Oxygen
TLDR
Observations that net photosynthesis and plant growth in general are stimulated in oxygen-depleted atmospheres concomitantly with a suppression of photorespiration reinforce this concept that oxygenation of RuDP must be deleterious to the photosynthesis process. Expand
...
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3
4
5
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