Overexpression of Superoxide Dismutase Protects Plants from Oxidative Stress (Induction of Ascorbate Peroxidase in Superoxide Dismutase-Overexpressing Plants)
- A. S. Gupta, R. Webb, A. Holaday, R. Allen
- Environmental SciencePlant Physiology
- 1 December 1993
Results indicate that transgenic tobacco plants that overexpress pea Cu/Zn SOD II can compensate for the increased levels of SOD with increased expression of the H2O2-scavenging enzyme APX.
Increased resistance to oxidative stress in transgenic plants that overexpress chloroplastic Cu/Zn superoxide dismutase.
- A. S. Gupta, J. L. Heinen, A. Holaday, J. Burke, R. Allen
- Environmental Science, BiologyProceedings of the National Academy of Sciences…
- 15 February 1993
It is demonstrated that SOD is a critical component of the active-oxygen-scavenging system of plant chloroplasts and indicate that modification of SOD expression in transgenic plants can improve plant stress tolerance.
Expression of an Arabidopsis vacuolar sodium/proton antiporter gene in cotton improves photosynthetic performance under salt conditions and increases fiber yield in the field.
- Cixin He, Juqiang Yan, Hong Zhang
- Medicine, BiologyPlant and Cell Physiology
- 1 November 2005
Overexpression of AtNHX1 increases sodium uptake in vacuoles, which leads to increased vacuolar solute concentration and therefore higher salt tolerance in transgenic plants, and indicates that At NHX1 can indeed be used for improving salt stress tolerance in cotton.
Changes in Activities of Enzymes of Carbon Metabolism in Leaves during Exposure of Plants to Low Temperature.
- A. Holaday, W. Martindale, R. Alred, A. L. Brooks, R. Leegood
- Environmental Science, BiologyPlant Physiology
- 1 March 1992
The inability of bean to activate fully certain Calvin cycle enzymes and sucrose-phosphate synthase, or to increase nonphotochemical quenching of chlorophyll fluorescence at 10 degrees C, may be factors contributing to its poor performance at low temperature.
The role of antioxidant enzymes in photoprotection
- B. Logan, D. Kornyeyev, Justin Hardison, A. Holaday
- EngineeringPhotosynthesis Research
- 19 April 2006
An analysis of attempts to improve stress tolerance by means of the creation of transgenic plants with elevated antioxidant enzyme activities concludes that the effect of such transgenic manipulation strongly depends on the manner in which the stress is imposed.
The Arabidopsis ascorbate peroxidase 3 is a peroxisomal membrane-bound antioxidant enzyme and is dispensable for Arabidopsis growth and development.
- Savitha Narendra, S. Venkataramani, Hong Zhang
- Environmental ScienceJournal of Experimental Botany
- 1 September 2006
The localization of a putative peroxisomal membrane-bound ascorbate peroxidase, APX3 from Arabidopsis, was confirmed by studying the green fluorescent protein (GFP)-APX3 fusion protein in transgenic plants and found to co-localize with a reporter protein that was targeted toperoxisomes by the peroxISomal targeting signal 1.
Leaf Water Content and Gas-Exchange Parameters of Two Wheat Genotypes Differing in Drought Resistance
- Steven W. Ritchie, H. Nguyen, A. Holaday
- Biology
- 1990
(...) The leaf relative water content (RWC) and gas-exchange parameters were compared between a drought-resistant winter wheat genotype (cv. TAM W-101) and a drought-susceptible genotype (cv. Sturdy)…
Protecting cotton photosynthesis during moderate chilling at high light intensity by increasing chloroplastic antioxidant enzyme activity.
- P. Payton, R. Webb, D. Kornyeyev, R. Allen, A. Holaday
- Environmental ScienceJournal of Experimental Botany
- 1 December 2001
To enhance the protection of photosynthesis using stroma-targeted antioxidant enzymes, enhancing metabolism associated with H( 2)O(2) is more effective than enhancing the capacity for superoxide scavenging.
Elevated chloroplastic glutathione reductase activities decrease chilling-induced photoinhibition by increasing rates of photochemistry, but not thermal energy dissipation, in transgenic cotton.
- D. Kornyeyev, B. Logan, P. Payton, R. Allen, A. Holaday
- Environmental ScienceFunctional Plant Biology
- 1 February 2003
Although GR overproduction afforded some increased protection against PSI photoinactivation, suggesting improved scavenging of reactive oxygen species, higher PSI activities could not completely explain the greater rates of photochemistry in GR+ plants.
Excitation pressure as a measure of the sensitivity of photosystem II to photoinactivation
- D. Kornyeyev, B. Logan, A. Holaday
- Physics
- 14 October 2010
Evidence is discussed showing that minimising of the amount of energy reaching closed PSII reaction centres (i.e. the excitation pressure) is important for photoprotection, and an integrated model that incorporates various mechanisms of PSII photoinactivation and analysis of their contribution is needed.
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